Intent to Amend Air Emission Permit to United Taconite LLC ... · Permit issued: [month day, year] 13700113-102 Permit expires: [month day, year] Page 5 of 230 3. Facility description

Draft Air Individual Permit Major Amendment

13700113-102 Permittee: United Taconite LLC - Fairlane Plant

Facility name: United Taconite LLC - Fairlane Plant 8470 Townline Rd. Forbes, MN 55738-0180 St. Louis County

Operating permit issuance date: February 23, 2000 Expiration date: February 23, 2005 * All Title I Conditions do not expire Major Amendment: [Action Issue Date] Permit characteristics: Federal; Part 70/Major for NSR; True Minor for NSR *The Permittee may continue to operate this facility after the expiration date of the permit, per the provision under Minn. R. 7007.0450, subp. 3. (Title V Reissuance Application was received August 30, 2004.) The emission units, control equipment and emission stacks at the stationary source authorized in this permit amendment are as described in the submittals listed in the Permit Applications Table. This permit amendment supersedes Air Emission Permit No. 13700113-007 and authorizes the Permittee to modify the stationary source at the address listed above unless otherwise noted in the permit. The Permittee must comply with all the conditions of the permit. Any changes or modifications to the stationary source must be performed in compliance with Minn. R. 7007.1150 to 7007.1500. Terms used in the permit are as defined in the state air pollution control rules unless the term is explicitly defined in the permit. Unless otherwise indicated, all the Minnesota rules cited as the origin of the permit terms are incorporated into the SIP under 40 CFR § 52.1220 and as such are enforceable by U.S. Environmental Protection Agency (EPA) Administrator or citizens under the Clean Air Act.

Signature: [ ] This document has been electronically signed. for the Minnesota Pollution Control Agency

for Carolina Espejel-Schutt, P.E., Acting Manager Air Quality Permits Section Industrial Division

Table of Contents

Page

1. Permit applications table ............................................................................................................................................. 3 2. Where to send submittals ............................................................................................................................................ 4 3. Facility description ....................................................................................................................................................... 5 4. Summary of subject items ........................................................................................................................................... 6 5. Limits and other requirements .................................................................................................................................. 18 6. Submittal/action requirements ............................................................................................................................... 145 7. Appendices ............................................................................................................................................................... 197

Appendix A. Insignificant Activities and General Applicable Requirements .......................................................... 197 Appendix B. Visible Emission Checklists ................................................................................................................ 204 Appendix C. Inapplicable Requirements ................................................................................................................ 209 Appendix D. Determining Sulfur Acid Mist Emissions at EQUI 45 and EQUI 47 Using Sulfur Dioxide Continuous

Emission Monitoring (CEM) Data .................................................................................................................... 210 Appendix E. Fugitive Dust Control Plan ................................................................................................................. 211 Appendix F. Waste Gas Scrubber Solids and Mercury Analysis Plan ..................................................................... 219 Appendix G. Maximum Contents of Materials (Fluxstone and Bentonite Material Handling Operations) ........... 228 Appendix H. Induration furnaces PM, PM10, and PM2.5 emissions calculations .................................................... 230

Permit issued: [month day, year] 13700113-102 Permit expires: [month day, year] Page 3 of 230

1. Permit applications table

Permit applications:

Title description Application receipt date Action number

Total Facility Operating Permit 01/17/1995 13700113-001

Minor Amendment 12/15/2000 13700113-002

Administrative Amendment 12/08/2000

Major Amendment 02/26/2002 13700113-003

Administrative Amendment 11/26/2003 13700113-004


Major Amendment 07/21/2008 13700113-005

Minor Amendment 11/30/2004





Notification (Control Replacement) 08/30/2004

Major Amendment 07/01/2014 13700113-006







Moderate Amendment 07/07/2015 13700113-007






Major Amendment 04/16/2019 (Supplemental information 01/22/2020)

13700113-102

Major Amendment 06/05/2019 (Supplemental information 12/17/2019)

Notification (Replacement of Unit) 11/20/2019

Reopening 08/31/2017


2. Where to send submittals

Send submittals that are required to be submitted to the EPA regional office to: Chief Air Enforcement Air and Radiation Branch EPA Region V 77 West Jackson Boulevard Chicago, Illinois 60604

Each submittal must be postmarked or received by the date specified in the applicable Table. Those submittals required by Minn. R. 7007.0100 to 7007.1850 must be certified by a responsible official, defined in Minn. R. 7007.0100, subp. 21. Other submittals shall be certified as appropriate if certification is required by an applicable rule or permit condition.

Send submittals that are required by the Acid Rain Program to:

U.S. Environmental Protection Agency Clean Air Markets Division 1200 Pennsylvania Avenue NW (6204N) Washington, D.C. 20460

Send any application for a permit or permit amendment to:

Fiscal Services – 6th Floor Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55155-4194

Also, where required by an applicable rule or permit condition, send to the Permit Document Coordinator notices of:

a. Accumulated insignificant activities b. Installation of control equipment c. Replacement of an emissions unit, and d. Changes that contravene a permit term

Unless another person is identified in the applicable Table, send all other submittals to:

AQ Compliance Tracking Coordinator Industrial Division Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55155-4194

Or Email a signed and scanned PDF copy to: [email protected] (for submittals related to stack testing) [email protected] (for other compliance submittals) (See complete email instructions in “Routine Air Report Instructions Letter” at http://www.pca.state.mn.us/nwqh472.)


3. Facility description

The United Taconite LLC - Fairlane Plant (United Taconite) is located at 8470 Townline Rd. in Forbes, St. Louis County, Minnesota. United Taconite is a taconite processing and pellet production facility located near Forbes, Minnesota. Crude taconite ore is supplied from United Taconite LLC - Thunderbird Mine (Air Emission Permit No. 13700011-001) via a third party-owned and operated rail link. Crushed ore is unloaded in a covered building then transferred by a covered conveyor to the fines crusher building where it is immediately crushed at the third-stage crusher or sent to the coarse ore surge pile. The coarse ore surge pile is used to store ore between train shipments or during times when the crusher is down. Ore is returned from the coarse ore surge pile and fed into one of the five third-stage crushers. Particulate emissions from the third-stage crushers are controlled by wet scrubbers or fabric filters. The oversize material is conveyed to one of eight forth-stage crushers. Each forth-stage crusher has a dedicated wet scrubber or fabric filter to control particulate emissions. Undersize material is transferred to the fine ore surge building. Oversize material is recirculated to the forth-stage crushers. Five concentrator lines receive ore from the fine ore surge building. Particulate emissions from the transfer of fine ore to the concentrator lines are controlled using wet scrubbers or fabric filters. Here ore is ground and magnetic separators remove the magnetite ore from the gangue to produce concentrate. Low-magnetic coarse tailings are transported by truck for use as construction material for tailing basin sidewalls. Fine tailings are pumped in slurry form to the tailings basin. The processes performed in the concentrator area are wet operations. Concentrate is piped as a slurry to the pelletizing plant where the slurry is dewatered with filters. Here additives are introduced and green pellets are produced in balling drums. The green pellets are conveyed to one of two traveling grate-kiln indurating furnaces where it is thermally hardened to produce fired pellets. The grate feed, grate discharge, kiln induration, and kiln cooler emissions are controlled with wet scrubbers. Fired pellets are conveyed to pellet storage silos. Pellets are then loaded into rail cars and transported from the facility. Particulate emissions from the pellets are controlled with wet scrubbers and dust suppressants. Intermediate products and byproducts, including but not limited to rocks, tailings, and concentrate, are also sold by United Taconite. Supporting activities at the Fairlane Plant include maintenance shops and offices. The United Taconite facility is a major source under the Prevention of Significant Deterioration (PSD) program, a major source under the Part 70 program and a major source of hazardous air pollutants (HAPs). This permit action incorporates a major amendment to change limits to avoid a major PSD modification that were originally incorporated into Air Emission Permit No. 13700113-005. That permit action established PM, PM10, and PM2.5 grain-loading emission limits and annual hours-of-operation limits of 7,992 hr/yr for each the Line 1 (EQUI 45) and Line 2 (EQUI 47) induration furnaces. United Taconite proposed to remove the annual operating-hour limits and grain-loading emission limits and replace them with12-month rolling sum emission limits. For EQUI 45, the proposed limits are PM ≤ 72.1 tpy, PM10 ≤ 143.0 tpy, and PM2.5 ≤ 143.0 tpy. For EQUI 47, the proposed limits are PM ≤ 317.6 tpy, PM10 ≤ 382.2 tpy, and PM2.5 ≤ 382.2 tpy. This permit action also incorporate new monitoring and recordkeeping requirements necessary to demonstrate compliance with the new emission limits. This permit action incorporates a separate major amendment to authorized construction of a new baghouse (TREA 92) to control particulate emissions from EQUI 170. It also corrects the control equipment relationships for EQUI 37 (controlled by TREA 11) and EQUI 55 (controlled by TREA 13). This permit action also incorporates a notification for the replacement and installation of two new natural gas-fired space heaters: EQUI 208 and EQUI 209. This permit action also incorporates an MPCA-initiated reopening to reset pressure drop operating parameters for TREA 89 and TREA 90, pressure drop and water flow rate operating parameters for TREA 49 and TREA 50, and water flow rate operating parameters for TREA 91.


4. Summary of subject items

SI ID: Description

Relationship type

Related SI ID: Description

TFAC 1: United Taconite LLC - Fairlane Plant

ACTV 1: Insignificant Activities

COMG 2: Pellet Loadout System for Line 2 after 10/13/2000 fire

has members EQUI 62, EQUI 63, EQUI 64, EQUI 65, STRU 62, TREA 42, TREA 59

COMG 3: Taconite MACT All Affected Sources

has members EQUI 9, EQUI 11, EQUI 12, EQUI 13, EQUI 14, EQUI 15, EQUI 17, EQUI 18, EQUI 19, EQUI 20, EQUI 21, EQUI 22, EQUI 23, EQUI 24, EQUI 26, EQUI 27, EQUI 45, EQUI 47, EQUI 62, EQUI 63, EQUI 64, EQUI 65, EQUI 117, EQUI 118, EQUI 119, EQUI 120, EQUI 121, EQUI 122, EQUI 123, EQUI 124, EQUI 125, EQUI 127, EQUI 128, EQUI 129, EQUI 130, EQUI 131, EQUI 132, FUGI 1, FUGI 3, FUGI 4, FUGI 5, FUGI 6, FUGI 7, FUGI 8, FUGI 9, FUGI 10, FUGI 11, FUGI 13, FUGI 15, FUGI 16, FUGI 17, FUGI 18, FUGI 19, FUGI 20, FUGI 21, FUGI 22, FUGI 23, FUGI 24, FUGI 25, FUGI 26, FUGI 27, FUGI 28, FUGI 29, FUGI 30, FUGI 37, FUGI 38, STRU 4, STRU 6, STRU 7, STRU 14, STRU 15, STRU 16, STRU 17, STRU 18, STRU 20,

SI ID: Description

Relationship type

Related SI ID: Description STRU 21, STRU 22, STRU 26, STRU 27, STRU 28, STRU 29, STRU 30, STRU 31, STRU 32, STRU 33, STRU 34, STRU 35, STRU 36, STRU 37, STRU 38, STRU 39, STRU 40, STRU 41, STRU 42, STRU 43, STRU 44, STRU 45, STRU 46, STRU 47, STRU 48, STRU 49, STRU 51, STRU 53, STRU 57, STRU 58, STRU 59, STRU 62, TREA 14, TREA 15, TREA 16, TREA 17, TREA 18, TREA 19, TREA 20, TREA 21, TREA 22, TREA 23, TREA 24, TREA 25, TREA 26, TREA 27, TREA 28, TREA 29, TREA 30, TREA 31, TREA 32, TREA 33, TREA 34, TREA 35, TREA 36, TREA 37, TREA 40, TREA 43, TREA 46, TREA 47, TREA 48, TREA 49, TREA 50, TREA 53, TREA 54, TREA 55, TREA 56, TREA 57, TREA 58, TREA 59, TREA 61, TREA 62, TREA 65, TREA 66, TREA 67, TREA 68, TREA 69, TREA 78, TREA 81, TREA 82, TREA 83, TREA 84, TREA 85, TREA 86, TREA 87, TREA 89, TREA 90

COMG 4: Taconite MACT Existing Ore Crushing and Handling

has members EQUI 9, EQUI 11, EQUI 12, EQUI 13, EQUI 14, EQUI 15, EQUI 17, EQUI 18, EQUI 19, EQUI 20,

Permit Issued: [month day, year] 13700113-102 Permit Expires: [month day, year] Page 7 of 230

SI ID: Description

Relationship type

Related SI ID: Description EQUI 21, EQUI 22, EQUI 23, EQUI 24, EQUI 26, EQUI 27, EQUI 117, EQUI 118, EQUI 119, EQUI 120, EQUI 121, EQUI 122, EQUI 123, EQUI 124, EQUI 125, EQUI 127, EQUI 130, STRU 18, STRU 22, STRU 26, STRU 27, STRU 28, STRU 29, STRU 30, STRU 31, STRU 32, STRU 33, STRU 34, STRU 35, STRU 36, STRU 37, STRU 38, STRU 39, STRU 40, STRU 41, STRU 42, STRU 43, STRU 44, STRU 45, STRU 46, STRU 47, STRU 48, STRU 49, STRU 57, STRU 58, TREA 36, TREA 37, TREA 40, TREA 46, TREA 47, TREA 48, TREA 49, TREA 50, TREA 62, TREA 65, TREA 66, TREA 67, TREA 68, TREA 69, TREA 81, TREA 82, TREA 87

COMG 5: Taconite MACT Existing Indurating Furnaces

has members EQUI 45, EQUI 47, STRU 6, STRU 7, STRU 15, STRU 16, STRU 53

COMG 6: Taconite MACT Existing Finished Pellet Handling

has members EQUI 62, EQUI 63, EQUI 64, EQUI 65, EQUI 128, EQUI 129, EQUI 131, EQUI 132, STRU 4, STRU 14, STRU 17, STRU 20, STRU 21, STRU 51, STRU 59, STRU 62

COMG 8: Wet Scrubber (Title V Requirements)

has members TREA 36, TREA 37, TREA 40, TREA 46, TREA 47, TREA 48, TREA 49, TREA 50, TREA 62, TREA 65,

SI ID: Description

Relationship type

Related SI ID: Description TREA 66, TREA 67, TREA 68, TREA 69, TREA 81, TREA 82, TREA 87

COMG 15: Replacement Pellet Reclaim Screening System

has members FUGI 5, FUGI 7, FUGI 10, FUGI 28

COMG 16: Wet Scrubbers

has members TREA 36, TREA 37, TREA 40, TREA 43, TREA 46, TREA 47, TREA 48, TREA 49, TREA 50, TREA 53, TREA 54, TREA 55, TREA 56, TREA 57, TREA 58, TREA 59, TREA 61, TREA 62, TREA 65, TREA 66, TREA 67, TREA 68, TREA 69, TREA 78, TREA 81, TREA 82, TREA 87, TREA 89, TREA 90, TREA 91

COMG 17: Baghouses has members TREA 14, TREA 15, TREA 16, TREA 18, TREA 19, TREA 20, TREA 21, TREA 22, TREA 23, TREA 24, TREA 25, TREA 26, TREA 28, TREA 29, TREA 30, TREA 31, TREA 35, TREA 83, TREA 84, TREA 85, TREA 86

COMG 19: Baghouses (Subject to CAM)

has members TREA 17, TREA 27, TREA 32, TREA 33, TREA 34

COMG 20: Fluxstone Storage Building Space Heaters

has members EQUI 185, EQUI 186, EQUI 187, EQUI 188, EQUI 189, EQUI 190, EQUI 191, EQUI 192, EQUI 193, EQUI 194, EQUI 195, EQUI 196, EQUI 197, EQUI 198, EQUI 199, EQUI 200, EQUI 201, EQUI 202, EQUI 203, EQUI 204

COMG 21: Fourth has members EQUI 17, EQUI 18,


SI ID: Description

Relationship type


Stage Crusher Performance Testing

EQUI 19, EQUI 20, EQUI 21, EQUI 22, EQUI 23, EQUI 24, STRU 34, STRU 35, STRU 36, STRU 37, STRU 38, STRU 39, STRU 40, STRU 57

COMG 22: Fluxstone Storage Building NSPS Subpart OOO Affected Facilities

has members EQUI 176, EQUI 177, EQUI 178, EQUI 179, EQUI 183, EQUI 205

EQUI 1: Make-up Heater - Prod Loadout

sends to STRU 62: Pellet product bins

EQUI 6: Conveyor 16T Discharge Transfer Point

EQUI 7: Conveyor 16TA Discharge Transfer Point

EQUI 9: Crude Ore Unloading

sends to STRU 47: Crude Ore Unloading


sends to STRU 48: Crude Ore Unloading


is controlled in parallel by

TREA 84: Fabric Filter - Wheelabrator-Frye




EQUI 11: Third Stage Crusher 1

sends to STRU 45: Third Stage Crusher 1


is controlled by

TREA 82: Wet Scrubber - AAF Type N Rotoclone




is controlled by





is controlled by





is controlled by


EQUI 15: Third Stage sends to STRU 42: Third

SI ID: Description

Relationship type


Crusher 5 Stage Crusher 5 EQUI 15: Third Stage Crusher 5

is controlled by

TREA 22: Fabric Filter - Donaldson-Torit

EQUI 17: Fourth Stage Crusher 1

sends to STRU 40: Fourth Stage Crusher 1


is controlled by





is controlled by





is controlled by





is controlled by





is controlled by





is controlled by





is controlled by





is controlled by


EQUI 26: Transfer House North

sends to STRU 32: Transfer House North

EQUI 26: Transfer House North

is controlled by


EQUI 27: Transfer sends to STRU 31: Transfer


SI ID: Description

Relationship type


House South House South EQUI 27: Transfer House South

is controlled by

TREA 17: Fabric Filter - Low Temperature

EQUI 33: Limestone Storage Bins

is controlled by


EQUI 34: Additive Rail Unloading

sends to STRU 25: Additive Rail Unloading

EQUI 34: Additive Rail Unloading

is controlled by

TREA 71: Fabric Filter - Mikropal

EQUI 35: Line 2 Binder Storage Bins

sends to STRU 24: Line 2 Binder Storage Bins

EQUI 35: Line 2 Binder Storage Bins

is controlled by

TREA 75: Fabric Filter - Enviro-Tech

EQUI 37: Binder Storage Bins / Additive Mixing

is controlled by


EQUI 41: Line 2 Pellet Cooler Exhaust

sends to STRU 19: Line 2 Cooler Exhaust

EQUI 45: Line 1 Pellet Induration

is monitored by

EQUI 142: Furnace 1 NOx CEMS


is monitored by

EQUI 143: Furnace 1 SO2 CEMS


is monitored by

EQUI 144: Furnace 1 Stack Air Flow


sends to STRU 6: Line 1 Stack Cap


sends to STRU 53: Line 1 Pellet Induration


is controlled by

TREA 91: Wet Scrubber - Ducon VV-O

EQUI 46: Line 1 Pellet Cooler Exhaust

sends to STRU 52: Line 1 Cooler Exhaust


is monitored by

EQUI 145: Furnace 2A NOx CEMS


is monitored by

EQUI 146: Furnace 2A SO2 CEMS


is monitored by

EQUI 147: Furnace 2A Stack Air Flow


is monitored by

EQUI 148: Furnace 2B NOx CEMS


is monitored by

EQUI 149: Furnace 2B SO2 CEMS


is monitored by

EQUI 150: Furnace 2B Stack Air Flow


sends to STRU 7: Line 2 Stack Cap

EQUI 47: Line 2 Pellet sends to STRU 15: Line 2

SI ID: Description

Relationship type


Induration Pellet Induration EQUI 47: Line 2 Pellet Induration

sends to STRU 16: Line 2 Pellet Induration







EQUI 49: Fairlane Truck Shop Boiler

sends to STRU 8: Truck Shop Boiler

EQUI 50: Fairlane New Shop Boiler

sends to STRU 9: New Shop Boiler

EQUI 51: Fuel Handling Boiler #1

sends to STRU 10: Fuel Handling Boiler #1

EQUI 52: Fuel Handling Boiler #2

sends to STRU 11: Fuel Handling Boiler #2

EQUI 53: "A" Binder Day Bin

sends to STRU 13: "A" Binder Day Bin

EQUI 53: "A" Binder Day Bin

is controlled by

TREA 77: Fabric Filter - Donaldson

EQUI 55: "B" Binder Day Bin

is controlled by

TREA 13: Fabric Filter - Low Temperature, i.e., T<180 Degrees F

EQUI 62: Prod Conveyor Transfer 22S



is controlled by

TREA 42: Pellet Dust Suppression


is controlled by

TREA 59: Wet Scrubber - Ducon AUW

EQUI 63: Prod Conveyor Transfer 22N



is controlled by



is controlled by





is controlled by



is controlled by





is controlled by



SI ID: Description

Relationship type



is controlled by


EQUI 68: Fuel Oil Storage Tank

EQUI 69: Waste Oil Storage Tank



EQUI 72: Gasoline Storage Tank

EQUI 73: Lube Oil Storage Tank

EQUI 74: Antifreeze Storage Tank

EQUI 75: Diesel Storage Tank

EQUI 117: Crude Ore Unloading Pan Feeders

sends to STRU 49: Crude Ore Unloading Pan Feeders

EQUI 117: Crude Ore Unloading Pan Feeders

is controlled by


EQUI 118: Coarse Ore Surge

sends to STRU 46: Coarse Ore Surge

EQUI 118: Coarse Ore Surge

is controlled by


EQUI 119: Third Stage Bins Conveyor

sends to STRU 41: Third Stage Bins Conveyor

EQUI 119: Third Stage Bins Conveyor

is controlled by


EQUI 120: Fourth Stage Trip/Bin/Convey

sends to STRU 33: Fourth Stage Trip/Bin/Convey

EQUI 120: Fourth Stage Trip/Bin/Convey

is controlled by


EQUI 121: #1 Rod Mill Feed

sends to STRU 30: #1 Rod Mill Feed


is controlled by

TREA 68: Wet Scrubber - AAF Type W Rotoclone



EQUI 122: #2 Rod Mill is controlled TREA 62: Wet

SI ID: Description

Relationship type


Feed by Scrubber - AAF Type W Rotoclone




is controlled by





is controlled by





is controlled by


EQUI 126: Line 2 Binder Addition

sends to STRU 23: Line 2 Binder Addition

EQUI 126: Line 2 Binder Addition

is controlled by


EQUI 127: Line 2 Grate Feed

sends to STRU 22: Line 2 Grate Feed


is controlled by

TREA 53: Wet Scrubber - Ducon UW-4

EQUI 128: Line 2 Grate Discharge

sends to STRU 21: Line 2 Grate Discharge


is controlled by


EQUI 129: Line 2 Kiln Cooler Discharge

sends to STRU 4: Line 2 Cooler Discharge


sends to STRU 14: Line 2 Cooler Discharge / Vibrating Feeders


sends to STRU 20: Line 2 Cooler Discharge











sends to STRU 18: Line 1 Grate Feed

EQUI 130: Line 1 Grate is controlled TREA 56: Wet


SI ID: Description

Relationship type


Feed by Scrubber - Ducon UW-4


sends to STRU 17: Line 1 Grate Discharge


is controlled by



sends to STRU 51: Line 1 Cooler Exhaust - CE 055 only


sends to STRU 59: Cooler Dump Zone - CE 065 only







EQUI 133: Binder Addition to Concentrate Conveyor

sends to STRU 12: "B" Binder Day Bin

EQUI 133: Binder Addition to Concentrate Conveyor

is controlled by


EQUI 134: Space Heater

sends to STRU 63: Space heater vent







EQUI 142: Furnace 1 NOx CEMS

EQUI 143: Furnace 1 SO2 CEMS

EQUI 144: Furnace 1 Stack Air Flow

EQUI 145: Furnace 2A NOx CEMS

EQUI 146: Furnace 2A SO2 CEMS

EQUI 147: Furnace 2A Stack Air Flow

EQUI 148: Furnace 2B NOx CEMS

EQUI 149: Furnace 2B SO2 CEMS

EQUI 150: Furnace 2B

SI ID: Description

Relationship type


Stack Air Flow EQUI 151: Environmental Management System

receives from EQUI 45: Line 1 Pellet Induration

EQUI 151: Environmental Management System

receives from EQUI 47: Line 2 Pellet Induration


receives from EQUI 142: Furnace 1 NOx CEMS


receives from EQUI 143: Furnace 1 SO2 CEMS


receives from EQUI 144: Furnace 1 Stack Air Flow


receives from EQUI 145: Furnace 2A NOx CEMS


receives from EQUI 146: Furnace 2A SO2 CEMS


receives from EQUI 147: Furnace 2A Stack Air Flow


receives from EQUI 148: Furnace 2B NOx CEMS


receives from EQUI 149: Furnace 2B SO2 CEMS


receives from EQUI 150: Furnace 2B Stack Air Flow

EQUI 152: Make-Up Heater 1 (Fine Crusher)




EQUI 158: Make-Up Heater (Fine Ore Surge - Conveyor 3)

EQUI 159: Make-Up


SI ID: Description

Relationship type


Heater (Fine Ore Surge - Conveyor 4) EQUI 160: Make-Up Heater (Fine Ore Surge - Conveyor 5)

EQUI 162: Space Heater (Pellet Plant Near Line 2 Chip Mill)

EQUI 164: Make-Up Heater 1 (Pellet Loadout)



EQUI 167: Make-Up Heater 1 (Transfer House)

EQUI 168: Make-Up Heater 2 (Transfer House)

EQUI 169: Line 1 Kiln Drive Emergency Engine

EQUI 170: Binder Unloading (Truck to Bin)

is controlled by

TREA 92: Binder Unloading (Truck to Bin) Baghouse

EQUI 171: Bentonite Unloading (Truck to Bin)

is controlled by


EQUI 172: Bentonite Conveying (Bin to #5 Conveyor)

is controlled by


EQUI 173: Fluxstone Railcar Summer Unloading (Bottom Dump to CV-001A)

sends to STRU 1: Fluxstone Railcar Unloading and Conveying

EQUI 173: Fluxstone Railcar Summer Unloading (Bottom Dump to CV-001A)

is controlled by


EQUI 174: Fluxstone Summer Conveying (CV-001A to CV-002)

sends to STRU 1: Fluxstone Railcar Unloading and Conveying

EQUI 174: Fluxstone Summer Conveying (CV-001A to CV-002)

is controlled by


EQUI 175: Fluxstone sends to STRU 1: Fluxstone

SI ID: Description

Relationship type


Winter Conveying (CV-001B to CV-002)

Railcar Unloading and Conveying

EQUI 175: Fluxstone Winter Conveying (CV-001B to CV-002)

is controlled by


EQUI 176: Fluxstone Conveying (CV-002 to CV-003)

is controlled by


EQUI 177: Fluxstone Transfer (CV-003 to Bin 1)

is controlled by


EQUI 178: Fluxstone Transfer (CV-003 to Bin 2)

is controlled by


EQUI 179: Fluxstone Transfer (Bin 1 to CV-005)

is controlled by


EQUI 181: Fluxstone Conveying (CV-003 to Stockpile)

EQUI 183: Fluxstone Reclaiming (CV-004 to CV-005)

is controlled by


EQUI 184: Fluxstone Crusher (CV-005 to Roll Crusher to CV-006)

sends to STRU 2: Fluxstone Conveying (CV-005 to Crusher to CV-006)

EQUI 184: Fluxstone Crusher (CV-005 to Roll Crusher to CV-006)

is controlled by


EQUI 185: Space Heater 1 (Fluxstone Storage Building)






EQUI 191: Space


SI ID: Description

Relationship type


Heater 7 (Fluxstone Storage Building) EQUI 192: Space Heater 8 (Fluxstone Storage Building)













EQUI 205: Fluxstone Transfer (Bin 2 to CV-005)

is controlled by


EQUI 206: Fluxstone Reclaiming (Loader to Hopper)

EQUI 208: Space Heater (Pellet Plant, Conv 21A Head)

SI ID: Description

Relationship type


EQUI 209: Space Heater (Line 1, Plant, Col B1-22 Grade)

FUGI 1: Coarse Ore Surge Dump

FUGI 3: Conveyor 3D Discharge Transfer Point

FUGI 4: Conveyor 3C Discharge Transfer Point

FUGI 5: Pellet Reclaim - Screen Prod to Belt 22N/S via Belt 22X

FUGI 6: Line 1 Pellet Transfer (21 to 21B)

FUGI 7: Pellet Reclaim - Hopper/Grizzly to Belt 22Z via Hopper Conveyor Belt

FUGI 8: Pellet Reclaim - Pile 2 to Hopper/Grizzly via Front End Loader

FUGI 9: Fine Ore Surge (10 to Pile Transfer)

FUGI 10: Pellet Reclaim - Hopper Conveyor Belt to Screen via Belt 22Z

FUGI 11: Conveyor 3E Discharge Transfer Point

FUGI 13: Pellet Reclaim - Hopper/Grizzly Oversize to Pile Transfer

FUGI 15: Pellet Loadout Conveyor N

FUGI 16: Conveyor 3F Discharge Transfer Point

FUGI 17: Pellet Reclaim - Screen to Belt 22 (out after action)

FUGI 18: Unpaved Roads - Light Truck Traffic Around Plant


SI ID: Description

Relationship type


FUGI 19: Unpaved Roads - Coarse Tailings to Tailings Basin

FUGI 20: Pellet Loadout Railcar Loading

FUGI 21: Conveyor 3A Discharge Transfer Point

FUGI 22: Conveyor 2C Discharge Transfer Point

FUGI 23: Fine Ore Surge (9F to 10 Transfer)

FUGI 24: Wind Erosion - Tailings Basin (Active Area)

FUGI 25: Wind Erosion - Concentrate Stockpile

FUGI 26: Pellet Reclaim - Pocket to Pile 2 (FEL)

FUGI 27: Conveyor 2D Discharge Transfer Point

FUGI 28: Pellet Reclaim - Screening

FUGI 29: Pellet Reclaim - Screen Fines to Stockpile (via Belt 22Y) Transfer

FUGI 30: Pellet Reclaim - Screen Oversize to Stockpile (via Chute) Transfer

FUGI 31: Concentrate Reclaim - Screen Oversize to Stockpile (via Belt 31B) Transfer

FUGI 32: Wind Erosion - Concentrate Reclaim Screen Oversize Stockpile

FUGI 33: Line 1 Pellet Transfer (21B to 22N/S)

FUGI 34: Unpaved Roads - Solid Fuel

SI ID: Description

Relationship type


Trucks FUGI 35: Fluxstone Railcar Winter Unloading (Railcar to Hopper)

FUGI 36: Fluxstone Railcar Winter Unloading (Hopper to CV-001B)

FUGI 37: Unpaved Roads - Trucks Hauling Concentrate

FUGI 38: Paved Roads - Trucks Hauling Concentrate

STRU 1: Fluxstone Railcar Unloading and Conveying

STRU 2: Fluxstone Conveying (CV-005 to Crusher to CV-006)

STRU 4: Line 2 Cooler Discharge

STRU 6: Line 1 Stack Cap

STRU 7: Line 2 Stack Cap

STRU 8: Truck Shop Boiler

STRU 9: New Shop Boiler

STRU 10: Fuel Handling Boiler #1

STRU 11: Fuel Handling Boiler #2

STRU 12: "B" Binder Day Bin

STRU 13: "A" Binder Day Bin

STRU 14: Line 2 Cooler Discharge / Vibrating Feeders

STRU 15: Line 2 Pellet Induration


STRU 17: Line 1 Grate Discharge

STRU 18: Line 1 Grate Feed


SI ID: Description

Relationship type


STRU 19: Line 2 Cooler Exhaust

STRU 20: Line 2 Cooler Discharge

STRU 21: Line 2 Grate Discharge

STRU 22: Line 2 Grate Feed

STRU 23: Line 2 Binder Addition

STRU 24: Line 2 Binder Storage Bins

STRU 25: Additive Rail Unloading

STRU 26: #5 Rod Mill Feed





STRU 31: Transfer House South

STRU 32: Transfer House North

STRU 33: Fourth Stage Trip/Bin/Convey

STRU 34: Fourth Stage Crusher 8







STRU 41: Third Stage Bins Conveyor

STRU 42: Third Stage Crusher 5


SI ID: Description

Relationship type




STRU 46: Coarse Ore Surge

STRU 47: Crude Ore Unloading


STRU 49: Crude Ore Unloading Pan Feeders

STRU 50: Pellet Loadout Bin 3 Vent

STRU 51: Line 1 Cooler Exhaust - CE 055 only

STRU 52: Line 1 Cooler Exhaust




STRU 59: Cooler Dump Zone - CE 065 only

STRU 60: Space heater vent


STRU 62: Pellet product bins



STRU 66: General Office


STRU 68: Coarse Ore Surge

STRU 69: Truck Shop STRU 70: Fines Crushing (3rd & 4th Stage Crushers)

STRU 71: Transfer House

STRU 72: Fine Ore Surge Pile


SI ID: Description

Relationship type


STRU 73: Concentrator STRU 74: Dry - Locker Room

STRU 75: Plant Office/Warehouse

STRU 76: Additive Plant

STRU 77: Pellet Plant STRU 78: Thickener STRU 79: Pellet Loadout

STRU 80: Tailings Pocket

STRU 81: Coal Transfer STRU 82: Fuel Handling STRU 83: Belt Shop STRU 84: Central Shop STRU 85: Substation STRU 86: Fire Pump House

STRU 87: Reel House STRU 88: Fluxstone Unloading

STRU 89: Fluxstone Storage










TREA 13: Fabric Filter - Low Temperature, i.e., T<180 Degrees F



SI ID: Description

Relationship type

























TREA 42: Pellet Dust is controlled TREA 59: Wet


SI ID: Description

Relationship type


Suppression in series by Scrubber - Ducon AUW


TREA 44: Fabric Filter - American Air Filter

TREA 45: Fabric Filter - Industrial Clean Filter


















SI ID: Description

Relationship type





TREA 71: Fabric Filter - Mikropal















TREA 92: Binder Unloading (Truck to Bin) Baghouse


5. Limits and other requirements

Requirement number Requirement and citation

TFAC 1 United Taconite LLC - Fairlane Plant

5.1.1 The Permittee is authorized to commence construction on the flux pellet project which includes the following equipment meeting the design requirements specified below within 18 months after permit issuance of Permit No. 13700113-007. The units shall meet all the requirements of this permit. The equipment authorized as part of the flux pellet project is as follows: - 8 natural-gas fired preheat burners (capable of firing 6.6 million cubic feet per hour each) for EQUI 45; - Replace the existing main kiln burners with low NOx burners for EQUI 45; - 12 natural-gas fired preheat burners (capable of firing 10.7 million cubic feet per hour each) for EQUI 47; - Replace the existing main kiln burners with low NOx burners for EQUI 47; - EQUI 171 - Bentonite Unloading (Truck to Bin), capable of processing 50 tons per hour of bentonite maximum; - EQUI 172 - Bentonite Conveying (Bin to #5 Conveyor), capable of processing 8.5 tons per hour of bentonite maximum; - EQUI 173 - Fluxstone Railcar Summer Unloading (Bottom Dump to CV-001A), capable of processing 1000 tons per hour of fluxstone maximum; - EQUI 174 - Fluxstone Summer Conveying (CV-001A to CV-002), capable of processing 1000 tons per hour of fluxstone maximum; - EQUI 175 - Fluxstone Winter Conveying (CV-001B to CV-002), capable of processing 550 tons per hour of fluxstone maximum; - EQUI 176 - Fluxstone Conveying (CV-002 to CV-003), capable of processing 1000 tons per hour of fluxstone maximum; - EQUI 177 - Fluxstone Transfer (CV-003 to Bin 1), capable of processing 1000 tons per hour of fluxstone maximum; - EQUI 178 - Fluxstone Transfer (CV-003 to Bin 2), capable of processing 1000 tons per hour of fluxstone maximum; - EQUI 179 - Fluxstone Transfer (Bin 1 to CV-005), capable of processing 250 tons per hour of fluxstone maximum; - EQUI 181 - Fluxstone Conveying (CV-003 to Stockpile), capable of processing 1000 tons per hour of fluxstone maximum; - EQUI 183 - Fluxstone Reclaiming (CV-004 to CV-005), capable of processing 250 tons per hour of fluxstone maximum; - EQUI 184 - Fluxstone Crusher (CV-005 to Roll Crusher to CV-006), capable of processing 250 tons per hour of fluxstone maximum; - 20 natural gas-fired space heaters (0.2 MMBtu/hr each, 4.0 MMBtu/hr total, EQUIs 185-204) listed in COMG 20; - EQUI 205 - Fluxstone Transfer (Bin 2 to CV-005), capable of processing 250 tons per hour of fluxstone maximum; - EQUI 206 - Fluxstone Reclaiming (Loader to Hopper), capable of processing 250 tons per hour of fluxstone maximum; - FUGI 35 - Fluxstone Railcar Winter Unloading (Railcar to Hopper), capable of processing 550 tons per hour of fluxstone maximum; - FUGI 36 - Fluxstone Railcar Winter Unloading (Hopper to CV-001B), capable of processing 550 tons per hour of fluxstone maximum; - TREA 1 - Fabric Filter, a baghouse controlling emissions from EQUI 171; - TREA 2 - Fabric Filter, a baghouse controlling emissions from EQUI 172; - TREA 3 - Fabric Filter, a baghouse controlling emissions from EQUIs 173, 174, and 175; - TREA 4 - Fabric Filter, a baghouse controlling emissions from EQUI 176;


Requirement number Requirement and citation - TREA 5 - Fabric Filter, a baghouse controlling emissions from EQUIs 177 and 178; - TREA 6 - Fabric Filter, a baghouse controlling emissions from EQUI 179, 183, and 205; - TREA 7 - Fabric Filter, a baghouse controlling emissions from EQUI 184. [Minn. R. 7007.0800, subp. 2]

5.1.2 Permit Appendices: This permit contains appendices as listed in the permit Table of Contents. The Permittee shall comply with all requirements contained in the following Appendices. Appendix A: Insignificant Activities and General Applicable Requirements Appendix B: Visible Emission Checklists Appendix C: Inapplicable Requirements Appendix D: Determining Sulfur Acid Mist Emissions at EQUI 45 and EQUI 47 Using Sulfur Dioxide Continuous Emission Monitoring (CEM) Data Appendix E: Fugitive Dust Control Plan Appendix F: Waste Gas Scrubber Solids and Mercury Analysis Plan Appendix G: Maximum Contents of Materials (Bentonite and Fluxstone Material Handling Operations) Appendix H: Indurating furnaces PM, PM10, and PM2.5 calculations. [Minn. R. 7007.0800, subp. 2]

5.1.3 PERMIT SHIELD: Subject to the limitations in Minn. R. 7007.1800, compliance with the conditions of this permit shall be deemed compliance with the specific provision of the applicable requirement identified in the permit as the basis of each condition. Subject to the limitations of Minn. R. 7007.1800 and 7017.0100, subp. 2, notwithstanding the conditions of this permit specifying compliance practices for applicable requirements, any person (including the Permittee) may also use other credible evidence to establish compliance or noncompliance with applicable requirements. This permit shall not alter or affect the liability of the Permittee for any violation of applicable requirements prior to or at the time of permit issuance. [Minn. R. 7007.1800(A)(2)]

5.1.4 The Permittee shall submit a complete updated application for permit reissuance: Due 30 calendar days after Permit Issuance. [Minn. R. 7007.0800, subp. 16(L), Minn. R. 7007.0800, subp. 2(B)]

5.1.5 Comply with Fugitive Emission Control Plan: The Permittee shall follow the actions and recordkeeping specified in the fugitive dust control plan in Appendix E of this permit. The plan may be amended by the Permittee with the Commissioner's approval. If the Commissioner determines the Permittee is out of compliance with Minn. R. 7011.0150 or the fugitive control plan, then the Permittee may be required to amend the control plan and/or to install and operate particulate matter ambient monitors as requested by the Commissioner. [Minn. R. 7007.0100, Minn. R. 7007.0800, subp. 2, Minn. R. 7009.0020, Minn. R. 7011.0150, Minn. Stat. 116.07, subd. 4a]

5.1.6 Contractors: The Permittee shall retain records on site of all contractors allowed on site to operate any crushers, screens and conveyors. The Permittee shall also retain records on site of all contractors whose operations would require an Air Emissions Permit from the MPCA. The records shall include the contractor's company name, MPCA air emissions permit number, short description of activities undertaken by the contractor, estimate of emissions or materials handled and the dates the contractor was on site. The records shall be updated at least quarterly. The Permittee shall evaluate if the activities of any contractor required NSR permitting prior to the contractor performing such activities. If a contractor has its own permit, but it is determined that the contractor is under the common control of the taconite plant then the contractor's permit does not shield the taconite plant or the contractor from the NSR & Part 70 modification regulations or enforcement actions. [Minn. R. 7007.0800, subps. 4-5]

5.1.7 Maximum Contents of Materials: The Permittee assumed certain worst-case contents of materials when determining the potential to emit of the fluxstone handling equipment (EQUIs 173-179, EQUI 181, EQUIs 183-184, EQUIs 205-206, and FUGIs 35-36) and bentonite handling equipment (EQUIs 171-172). These assumptions are listed in Appendix G of this permit. Changing to a material composition


Requirement number Requirement and citation that has a higher bentonite or fluxstone content is considered a change in method of operation that must be evaluated under Minn. R. 7007.1200, subp. 3 to determine if a permit amendment or notification is required under Minn. R. 7007.1150. [Minn. R. 7005.0100, subp. 35a]

5.1.8 Comply with the Federal Implementation Plan for Regional Haze: a. Comply with each emission limitation, operational limitation, work practice standard, and associated monitoring, recordkeeping, and reporting requirement contained in 40 CFR Section 52.1235 that applies to United Taconite by the identified compliance dates; and b. Submit the required notifications and reports by the identified due dates contained in 40 CFR Section 52.1235. [40 CFR 52.1235]

5.1.9 The Permittee shall limit Taconite Pellet Production <= 6.000000 million tons per year 12-month rolling sum (long tons of taconite pellets at the facility). [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.1.10 Taconite Pellet Production Monitoring The Permittee shall monitor and record the long tons of taconite pellets produced at EQUI 45 and EQUI 47 on a monthly basis. [Minn. R. 7007.0800, subp. 4, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.1.11 Taconite Pellet Production Monthly Recordkeeping By the 15th day of each month, the Permittee shall calculate and record the following: 1. The production of taconite pellets (in long tons) at EQUI 45 for the previous month; 2. The production of taconite pellets (in long tons) at EQUI 47 for the previous month; and 3. The 12-month rolling sum of combined production of taconite pellets (in long tons) for EQUI 45 and EQUI 47. This is determined by summing the monthly production of taconite pellets for EQUI 45 and EQUI 47 for the previous 12 months. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.1.12 Opacity Standards: Opacity standards apply at all times except during periods of start-up, shutdown, and malfunction, and as otherwise provided in an applicable requirement or compliance document. The exemption for periods of start-up, shutdown and malfunction applies only if the conditions of Minn. R. 7011.0010, subps. 4(A), (B), and (C) are met. [Minn. R. 7011.0010, subp. 4]

5.1.13 Visible Emissions Check: The Permittee shall check visible emissions once daily when in operation during daylight hours using the visible emissions checklists for all sources included in Appendix B. If, based on completion of the checklist, the Permittee determines that additional investigative or remedial action is required, the Permittee shall investigate process and control equipment, and, if necessary, implement appropriate corrective action. Note that fabric filters (baghouses) that are equipped with an MPCA-approved bag leak detection system are not subject to daily visible emission inspections as identified in this requirement and Appendix B. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.1.14 Visible Emissions Checklists: The Permittee shall use the Stack Emissions Checklists identified in Appendix B. These checklists will become part of the O&M plan upon Plan approval. Note that fabric filters (baghouses) that are equipped with an MPCA-approved bag leak detection system are not subject to daily visible emission inspections as identified in this requirement and Appendix B. [Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 4(D)]

5.1.15 For all units identified in the Stack Emissions Checklists that are controlled by fabric filters, cyclones, and/or multiclones, a daily check of pressure drop is required if visible emissions in the plume are


Requirement number Requirement and citation unreadable due to visible moisture. For all units identified in the Stack Emissions Checklists that are controlled by scrubbers, a daily check of pressure drop and total water flow is required if the visible emissions in the plume are unreadable due to visible moisture. Note that fabric filters (baghouses) that are equipped with an MPCA-approved bag leak detection system are not subject to daily visible emission inspections or daily check of pressure drop as identified in this requirement and Appendix B. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.1.16 Fugitive Dust Observations: Prior to the approval of the Fugitive Control Plan, the Permittee shall use the Fugitive Emissions Checklists to monitor fugitive dust control practices. The Permittee shall observe fugitive dust sources once daily during daylight hours for all sources identified in the Fugitive Emissions Checklists. In the event the Permittee makes a finding that attention to fugitive dust sources is required, the Permittee shall investigate the fugitive dust sources and implement corrective action, if necessary. Upon approval of the Fugitive Control Plan the Fugitive Emissions Checklists shall become part of the Plan. The Permittee shall observe fugitive dust sources once daily during daylight hours for all sources identified in the Fugitive Emissions Checklists. The Permittee shall use the Fugitive Emissions Checklists in the Fugitive Control Plan as a means to indicate when appropriate corrective actions in the Fugitive Control Plan are taken. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.1.17 Fugitive Sources Visible Emissions Checklists: The Permittee shall use the Fugitive Emissions Checklists identified in Appendix B. These checklist(s) will become part of the Fugitive Control Plan upon Plan approval. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.1.18 Visible Emissions Training: The Permittee shall (1) ensure that one employee obtain an initial EPA Method 9 certification and be recertified every three years or (2) employ a similarly certified contractor. This person will train other employees to perform the daily visible emissions check as detailed in the O&M Plan and Fugitive Control Plan. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.1.19 In accordance with the May 11, 2010 applicability determination from USEPA Region 5, the coal pulverizer and associated pneumatic transfer pipe installed as part of the modification authorized by Air Emission Permit No. 13700113-005 are subject to 40 CFR pt. 60, subp. Y. Since there is no direct route to the atmosphere from these units, the PM and opacity limits from 40 CFR 60.254(b)(1) and (2) do not apply. If a point of potential release to the atmosphere from the pulverizer or the pipe is created, 40 CFR Section 60.254(b)(1) and (2) would apply immediately to the point of release. In addition, any visible emissions from equipment leaks from the pulverizer or the pneumatic transfer pipe will be subject to Subpart Y's opacity standard. [40 CFR 60.250, 40 CFR 60.254]

5.1.20 No owner or operator shall build, erect, install, or use any article, machine, equipment or process, the use of which conceals an emission which would otherwise constitute a violation of an applicable standard. [40 CFR 60.12, Minn. R. 7011.0050]

5.1.21 Mercury Emissions Reduction Plan Implementation: The Permittee must implement and comply with the mercury emissions reduction plan, as approved by the Commissioner, no later than January 1, 2025. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0502, Minn. R. 7007.0800,


Requirement number Requirement and citation subp. 2(A)]

5.1.22 Mercury Emissions Reduction Plan Information Requests: The Permittee shall respond to MPCA information requests regarding the Permittee's submitted mercury emission reduction plan under review within the timeframe specified in the information request or within the timeframe extended in agreement with the MPCA. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0800, subp. 16(L), Minn. R. 7007.0800, subp. 2(A)]

5.1.23 Mercury Reduction Plan Implementation Reports: The Permittee must submit annual progress reports to the commissioner by April 1 of each year starting with the year following plan approval until one full year after achievement of the reduction as described in the plan. The report must provide the status of facility modifications and actions taken in the preceding 12 months on each of the plan elements as identified in Minn. R. 7007.0502, subp. 5. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0502, subp. 8, Minn. R. 7007.0800, subp. 16(L), Minn. R. 7007.0800, subp. 2(A)]

5.1.24 Mercury Reduction Plan Modifications: The Permittee may request modification of the approved mercury emissions reduction plan or enforceable agreement by submitting a written request to the commissioner. The request must include: (1) a description of the modification; (2) reasons for the modification; and (3) if the request is to modify the mercury reduction, the information required under Minn. R. 7007.0502, subp. 5(A)(1), for the requested new reduction. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0502, subp. 9(A), Minn. R. 7007.0800, subp. 2(A)]

5.1.25 Mercury Reduction Plan Modifications: The Permittee may not implement any proposed plan modifications until the commissioner approves the modification, issues an amended permit, or revises an enforceable agreement, as applicable. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0502, subp. 9(B)]

5.1.26 The Permittee shall quantify the mercury emitted when operating above a 5.436 million long tons per year taconite pellet production rate and determine the amount attributed to the production increase authorized in Air Emission Permit No. 13700113-005. When Line 1 is burning solid fuels, the Permittee shall quantify the mercury emissions from the combustion of the solid fuel. The Permittee shall off-set these project-related (authorized in Air Emission Permit No. 13700113-005) mercury emissions in accordance with the MPCA-approved Waste Gas Scrubber Solids and Mercury Analysis Plan contained in Appendix F of this permit. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0800, subp. 2, Minn. Stat.


Requirement number Requirement and citation 116.07, subd. 4a(a)]

5.1.27 The Permittee may reduce mercury emissions in excess of that required to ensure no net increase of mercury emissions from the project authorized by Air Emission Permit No. 13700113-005. Using MPCA approved data from the Waste Gas Scrubber Solids and Mercury Analysis Plan, such equivalent and excess mercury reductions may be banked and used at United Taconite at any time in the future until 2025 on a one-for-one basis or, as outlined in the Mercury TMDL Implementation Plan, used at another facility. Equivalent mercury reductions from another facility may be used to supplement the Permittee's on-site mercury emission reductions requirements, upon approval by MPCA, as outlined in the Mercury TMDL Implementation Plan. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0800, subp. 2]

5.1.28 Recordkeeping: Using the method submitted in the Waste Gas Scrubber Solids and Mercury Analysis Plan and approved by the MPCA, by the last day of each month the Permittee shall calculate and record annual mercury emissions from the previous 12 months for any taconite pellet production greater than 5.436 million long tons per year using a 12-month rolling sum. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0800, subp. 5]

5.1.29 Recordkeeping: By the last day of each month the Permittee shall reconcile for the previous month the project-related mercury emissions, the amount of mercury emissions off-set by routing scrubber solids to the tailings basin and any banked mercury reductions. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0800, subp. 5]

5.1.30 These requirements apply if a reasonable possibility (RP) as defined in 40 CFR Section 52.21(r)(6)(vi) exists that a proposed project, analyzed using the actual-to-projected-actual (ATPA) test (either by itself or as part of the hybrid test at Section 52.21(a)(2)(iv)(f)) and found to not be part of a major modification, may result in a significant emissions increase (SEI). If the ATPA test is not used for the project, or if there is no RP that the proposed project could result in a SEI, these requirements do not apply to that project. The Permittee is only subject to the Preconstruction Documentation requirement for a project where a RP occurs only within the meaning of Section 52.21(r)(6)(vi)(b). Even though a particular modification is not subject to New Source Review (NSR), or where there isn't a RP that a proposed project could result in a SEI, a permit amendment, recordkeeping, or notification may still be required by Minn. R. 7007.1150 - 7007.1500. [Minn. R. 7007.0800, subp. 2, Title I Condition: 40 CFR 52.21(r)(6) and Minn. R. 7007.3000]

5.1.31 Preconstruction Documentation -- Before beginning actual construction on a project, the Permittee shall document the following: 1. Project description 2. Identification of any emission unit whose emissions of an NSR pollutant could be affected 3. Pre-change potential emissions of any affected existing emission unit, and the projected post-change potential emissions of any affected existing or new emission unit. 4. A description of the applicability test used to determine that the project is not a major modification for any regulated NSR pollutant, including the baseline actual emissions, the projected actual emissions, the amount of emissions excluded due to increases not associated with the modification and that the emission unit could have accommodated during the baseline period, an explanation of


Requirement number Requirement and citation why the amounts were excluded, and any creditable contemporaneous increases and decreases that were considered in the determination. The Permittee shall maintain records of this documentation. [Minn. R. 7007.0800, subps. 4-5, Minn. R. 7007.1200, subp. 4, Title I Condition: 40 CFR 52.21(r)(6) and Minn. R. 7007.3000]

5.1.32 The Permittee shall monitor the actual emissions of any regulated NSR pollutant that could increase as a result of the project and that were analyzed using the ATPA test, and the potential emissions of any regulated NSR pollutant that could increase as a result of the project and that were analyzed using potential emissions in the hybrid test. The Permittee shall calculate and maintain a record of the sum of the actual and potential (if the hybrid test was used in the analysis) emissions of the regulated pollutant, in tons per year on a calendar year basis, for a period of 5 years following resumption of regular operations after the change, or for a period of 10 years following resumption of regular operations after the change if the project increases the design capacity of or potential to emit of any unit associated with the project. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: 40 CFR 52.21(r)(6) and Minn. R. 7007.3000]

5.1.33 The Permittee must submit a report to the Agency if the annual summed (actual, plus potential if used in hybrid test) emissions differ from the preconstruction projection and exceed the baseline actual emissions by a significant amount as listed at 40 CFR Section 52.21(b)(23). Such report shall be submitted to the Agency within 60 days after the end of the year in which the exceedances occur. The report shall contain: a. The name and ID number of the Facility, and the name and telephone number of the Facility contact person. b. The annual emissions (actual, plus potential if any part of the project was analyzed using the hybrid test) for each pollutant for which the preconstruction projection and significant emissions increase are exceeded. c. Any other information, such as an explanation as to why the summed emissions differ from the preconstruction projection. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: 40 CFR 52.21(r)(6) and Minn. R. 7007.3000]

5.1.34 The Permittee shall comply with National Primary and Secondary Ambient Air Quality Standards, 40 CFR pt. 50, and the Minnesota Ambient Air Quality Standards, Minn. R. 7009.0010 to 7009.0090. Compliance shall be demonstrated upon written request by the MPCA. [Minn. R. 7007.0800, subp. 2(A) & (B), Minn. R. 7009.0020-7009.0090, Minn. Stat. 116.07, subd. 4a(a)]

5.1.35 Remodeling Language for Baseline Model: This permit condition applies to the following NAAQS criteria pollutants and their respective averaging times: - 1-hr SO2; - 1-hr NO2; - 24-hour PM10; and - 24-hour and Annual PM2.5. The Permittee shall submit within 45 days after permit issuance, the following pre-protocol information for MPCA review and comment: - List of nearby sources to be included in cumulative review for each criteria pollutant, including emission rates and methodology for including or excluding sources; - Proposed receptor grid placement; - Proposed meteorological data set; - Proposed deposition assumptions; and - Site-specific supporting information to be used for Method 1 assumptions, if Method 1 is anticipated to be applied.


Requirement number Requirement and citation The pre-protocol submittal should be consistent with the modeling practices presented in the most current version of the MPCA Air Quality Dispersion Modeling Manual. Deviations from existing practices must be supported by evidence and presented in this submittal. [Minn. R. 7007.0800, subp. 2(A) & (B), Minn. R. 7009.0020-7009.0090, Minn. Stat. 116.07, subd. 4a(a)]

5.1.36 NAAQS Modeling Protocol: This permit condition applies to the following NAAQS criteria pollutants and their respective averaging times: - 1-hr SO2; - 1-hr NO2; - 24-hour PM10; and - 24-hour and Annual PM2.5. The Permittee must within 180 days of permit issuance, submit an approvable Computer Dispersion Modeling protocol consistent with the current version of the MPCA Air Dispersion Modeling Practices Manual using the applicable MPCA modeling form(s) for the permitted facility. [Minn. R. 7007.0800, subp. 2(A) & (B), Minn. R. 7009.0020-7009.0090, Minn. Stat. 116.07, subd. 4a(a)]

5.1.37 NAAQS Modeling Results: This permit condition applies to the following NAAQS criteria pollutants and their respective averaging times: - 1-hr SO2; - 1-hr NO2, ; - 24-hour PM10; and - 24-hour and Annual PM2.5. The Permittee must within 60 days of Protocol approval, submit a final modeling report to the MPCA using the appropriate modeling form(s) as directed in the MPCA Air Dispersion Modeling Practices Manual. [Minn. R. 7007.0800, subp. 2(A) & (B), Minn. R. 7009.0020-7009.0090, Minn. Stat. 116.07, subd. 4a(a)]

5.1.38 Circumvention: Do not install or use a device or means that conceals or dilutes emissions, which would otherwise violate a federal or state air pollution control rule, without reducing the total amount of pollutant emitted. [Minn. R. 7011.0020]

5.1.39 Air Pollution Control Equipment: The permittee shall at all times properly operate and maintain the facilities and systems of treatment and control and the appurtenances related to them which are installed or used by the permittee to achieve compliance with the conditions of the permit. Proper operation and maintenance includes effective performance, adequate funding, adequate operator staffing and training, and adequate laboratory and process controls, including appropriate quality assurance procedures. [Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 2]

5.1.40 Operation and Maintenance Plan: Retain at the stationary source an operation and maintenance plan for all air pollution control equipment. At a minimum, the O & M plan shall identify all air pollution control equipment and control practices and shall include a preventative maintenance program for the equipment and practices, a description of (the minimum but not necessarily the only) corrective actions to be taken to restore the equipment and practices to proper operation to meet applicable permit conditions, a description of the employee training program for proper operation and maintenance of the control equipment and practices, and the records kept to demonstrate plan implementation. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J)]

5.1.41 Operation Changes: In any shutdown, breakdown, or deviation the Permittee shall immediately take all practical steps to modify operations to reduce the emission of any regulated air pollutant. The Commissioner may require feasible and practical modifications in the operation to reduce emissions of air pollutants. No emissions units that have an unreasonable shutdown or breakdown frequency of process or control equipment shall be permitted to operate. [Minn. R. 7019.1000, subp. 4]



5.1.42 Fugitive Emissions: Do not cause or permit the handling, use, transporting, or storage of any material in a manner which may allow avoidable amounts of particulate matter to become airborne. Comply with all other requirements listed in Minn. R. 7011.0150. [Minn. R. 7011.0150]

5.1.43 Noise: The Permittee shall comply with the noise standards set forth in Minn. R. 7030.0010 to 7030.0080 at all times during the operation of any emission units. This is a state only requirement and is not enforceable by the EPA Administrator or citizens under the Clean Air Act. [Minn. R. 7030.0010-7030.0080]

5.1.44 Inspections: The Permittee shall comply with the inspection procedures and requirements as found in Minn. R. 7007.0800, subp. 9(A). [Minn. R. 7007.0800, subp. 9(A)]

5.1.45 The Permittee shall comply with the General Conditions listed in Minn. R. 7007.0800, subp. 16. [Minn. R. 7007.0800, subp. 16]

5.1.46 Performance Testing: Conduct all performance tests in accordance with Minn. R. ch. 7017 unless otherwise noted in this permit. [Minn. R. ch. 7017]

5.1.47 Performance Test Notifications and Submittals: Performance Test Notification and Plan: due 30 days before each Performance Test Performance Test Pre-test Meeting: due 7 days before each Performance Test Performance Test Report: due 45 days after each Performance Test The Notification, Test Plan, and Test Report must be submitted in a format specified by the commissioner. [Minn. R. 7017.2017, Minn. R. 7017.2030, subps. 1-4, Minn. R. 7017.2035, subps. 1-2]

5.1.48 Limits set as a result of a performance test (conducted before or after permit issuance) apply until superseded as stated in the MPCA's Notice of Compliance letter granting preliminary approval. Preliminary approval is based on formal review of a subsequent performance test on the same unit as specified by Minn. R. 7017.2025, subp. 3. The limit is final upon issuance of a permit amendment incorporating the change. [Minn. R. 7017.2025, subp. 3]

5.1.49 Performance Tests -- The following performance testing requirements apply unless specified elsewhere in this permit, in an applicable regulation, or an alternative is approved by MPCA in the performance test plan approval: 1. Performance testing for Line 1 (specifically, EQUI 45-46, EQUI 130-132, and the associated control equipment and stacks) shall be tested at a green ball feed rate of greater than or equal to 250 long tons per hour. 2. Performance testing for Line 2 (specifically, EQUI 41, EQUI 47, EQUI 127-129, and the associated control equipment and stacks) shall be tested at a green ball feed rate of greater than or equal to 630 long tons per hour. 3. All other emission units and their associated control equipment and stacks shall be tested at greater than or equal to 90% of the emission units rated capacity. If a performance test is conducted at less than the applicable minimum rate given above, the Permittee shall be given the opportunity to retest within 90 days of the subject test before process limits can be applied as specified in Minn. R. 7017.2025, subp. 3. [Minn. R. 7017.2025]

5.1.50 Monitoring Equipment Calibration - The Permittee shall either: 1. Calibrate or replace required monitoring equipment every 12 months; or 2. Calibrate at the frequency stated in the manufacturer's specifications. For each monitor, the Permittee shall maintain a record of all calibrations, including the date


Requirement number Requirement and citation conducted, and any corrective action that resulted. The Permittee shall include the calibration frequencies, procedures, and manufacturer's specifications (if applicable) in the Operations and Maintenance Plan. Any requirements applying to continuous emission monitors are listed separately in this permit. [Minn. R. 7007.0800, subp. 4(D)]

5.1.51 Operation of Monitoring Equipment: Unless noted elsewhere in this permit, monitoring a process or control equipment connected to that process is not necessary during periods when the process is shutdown, or during checks of the monitoring systems, such as calibration checks and zero and span adjustments. If monitoring records are required, they should reflect any such periods of process shutdown or checks of the monitoring system. [Minn. R. 7007.0800, subp. 4(D)]

5.1.52 Monitoring Equipment Installation: Install monitoring equipment for air pollution control devices within 180 days of permit issuance. Monitoring equipment, if not already existing, must be installed within this time period to monitor surrogate parameters such as "Pressure Drop," "Water Flow Rate," and/or "Total Water Pressure," which are listed elsewhere in this permit for specific component groups, control equipment, and emission units. [Minn. R. 7007.0800, subp. 4(D)]

5.1.53 Monitoring Equipment Debugging, Troubleshooting, and Establishment of Parameter Ranges: Complete within 180 days of installation or of completion of needed repairs of all monitoring equipment. [Minn. R. 7007.0800, subp. 4(D)]

5.1.54 Equipment Inventory: The Permittee shall maintain a written list of all emissions units and control equipment on site that shall be made available for inspection upon request. The Permittee shall update the list to include any replaced, modified, or new equipment prior to making the change. The list shall correlate the units to the Subject Item numbers (EQUI, STRU, TREA, COMG) used in this permit and shall include the data on the GI-04, GI-05A, GI-05B, and GI-05F forms. The date of construction shall be the date the change was made for replaced, modified, or new equipment. [Minn. R. 7007.0800, subp. 2]

5.1.55 Recordkeeping: Retain all records at the stationary source, unless otherwise specified within this permit, for a period of five (5) years from the date of monitoring, sample, measurement, or report. Records which must be retained at this location include all calibration and maintenance records, all original recordings for continuous monitoring instrumentation, and copies of all reports required by the permit. Records must conform to the requirements listed in Minn. R. 7007.0800, subp. 5(A). [Minn. R. 7007.0800, subp. 5(C)]

5.1.56 Recordkeeping: Maintain records describing any insignificant modifications (as required by Minn. R. 7007.1250, subp. 3) or changes contravening permit terms (as required by Minn. R. 7007.1350, subp. 2), including records of the emissions resulting from those changes. [Minn. R. 7007.0800, subp. 5(B)]

5.1.57 If the Permittee determines that no permit amendment or notification is required prior to making a change, the Permittee must retain records of all calculations required under Minn. R. 7007.1200. These records shall be kept for a period of five years from the date the change was made or until permit reissuance, whichever is longer. The records shall be kept at the stationary source for the current calendar year of operation and may be kept at the stationary source or office of the stationary source for all other years. The records may be maintained in either electronic or paper format. [Minn. R. 7007.1200, subp. 4]

5.1.58 Shutdown Notifications: Notify the Commissioner at least 24 hours in advance of a planned shutdown of any control equipment or process equipment if the shutdown would cause any increase in the emissions of any regulated air pollutant. If the owner or operator does not have advance knowledge of the shutdown, notification shall be made to the Commissioner as soon as possible after the shutdown. However, notification is not required in the circumstances outlined in items A, B, and C of Minn. R. 7019.1000, subp. 3. At the time of notification, the owner or operator shall inform the Commissioner of the cause of the


Requirement number Requirement and citation shutdown and the estimated duration. The owner or operator shall notify the Commissioner when the shutdown is over. [Minn. R. 7019.1000, subp. 3]

5.1.59 Breakdown Notifications: Notify the Commissioner within 24 hours of a breakdown of more than one hour duration of any control equipment or process equipment if the breakdown causes any increase in the emissions of any regulated air pollutant. The 24-hour time period starts when the breakdown was discovered or reasonably should have been discovered by the owner or operator. However, notification is not required in the circumstances outlined in items A, B, and C of Minn. R. 7019.1000, subp. 2. At the time of notification or as soon as possible thereafter, the owner or operator shall inform the Commissioner of the cause of the breakdown and the estimated duration. The owner or operator shall notify the Commissioner when the breakdown is over. [Minn. R. 7019.1000, subp. 2]

5.1.60 Notification of Deviations Endangering Human Health or the Environment: As soon as possible after discovery, notify the Commissioner or the state duty officer, either orally or by facsimile, of any deviation from permit conditions which could endanger human health or the environment. [Minn. R. 7019.1000, subp. 1]

5.1.61 Notification of Deviations Endangering Human Health or the Environment Report: Within 2 working days of discovery, notify the Commissioner in writing of any deviation from permit conditions which could endanger human health or the environment. Include the following information in this written description: 1. the cause of the deviation; 2. the exact dates of the period of the deviation, if the deviation has been corrected; 3. whether or not the deviation has been corrected; 4. the anticipated time by which the deviation is expected to be corrected, if not yet corrected; and 5. steps taken or planned to reduce, eliminate, and prevent reoccurrence of the deviation. [Minn. R. 7019.1000, subp. 1]

5.1.62 Application for Permit Amendment: If a permit amendment is needed, submit an application in accordance with the requirements of Minn. R. 7007.1150 through Minn. R. 7007.1500. Submittal dates vary, depending on the type of amendment needed. Upon adoption of a new or amended federal applicable requirement, and if there are 3 or more years remaining in the permit term, the Permittee shall file an application for an amendment within nine months of promulgation of the applicable requirement, pursuant to Minn. R. 7007.0400, subp. 3. [Minn. R. 7007.0400, subp. 3, Minn. R. 7007.1150 - 7007.1500]

5.1.63 For changes that do not require a permit amendment: - The Permittee shall submit a Part 1 MACT application within 30 days of startup of any 112(j) affected source. The application shall meet the requirements of 40 CFR Section 63.53(a). - The Permittee shall submit a Part 2 MACT application within 90 days of startup of any 112(j) affected source. The application shall meet the requirements of 40 CFR Section 63.53(b). 112(j) affected source is defined in 40 CFR Section 63.51. [40 CFR 63.52(b)(1), 40 CFR 63.52(e)(1)]

5.1.64 Extension Requests: The Permittee may apply for an Administrative Amendment to extend a deadline in a permit by no more than 120 days, provided the proposed deadline extension meets the requirements of Minn. R. 7007.1400, subp. 1(H). Performance testing deadlines from the General Provisions of 40 CFR pt. 60 and pt. 63 are examples of deadlines for which the MPCA does not have authority to grant extensions and therefore do not meet the requirements of Minn. R. 7007.1400, subp. 1(H). [Minn. R. 7007.1400, subp. 1(H)]

5.1.65 Emission Inventory Report: due on or before April 1 of each calendar year following permit issuance. Submit in a format specified by the Commissioner. [Minn. R. 7019.3000-7019.3100]



5.1.66 Emission Fees: due 30 days after receipt of an MPCA bill. [Minn. R. 7002.0005-7002.0085]

5.1.67 The Permittee must submit a Risk Management Plan (RMP) under 40 CFR pt. 68. Each owner or operator of a stationary source, at which a regulated substance is present above a threshold quantity in a process, shall design and implement an accidental release prevention program. An initial RMP must be submitted no later than the latest of the following dates: 1) June 21, 1999; 2) Three years after the date on which a regulated substance is first listed under 40 CFR Section 68.130; or 3) The date on which a regulated substance is first present above a threshold quantity in a process. A full update and resubmission of the RMP is required at least once every five years. The five-year anniversary date is reset whenever the Permittee fully updates and resubmits their RMP. Submit RMPs as specified by EPA as of the date of submission. [40 CFR pt. 68]

COMG 2 Pellet Loadout System for Line 2 after 10/13/2000 fire

5.2.1 The Permittee shall vent emissions from EQUI 62 to control equipment meeting the requirements of TREA 59 whenever EQUI 62 operates. The Permittee shall vent emissions from EQUI 63 to control equipment meeting the requirements of TREA 59 whenever EQUI 63 operates. The Permittee shall vent emissions from EQUI 64 to control equipment meeting the requirements of TREA 59 whenever EQUI 64 operates. The Permittee shall vent emissions from EQUI 65 to control equipment meeting the requirements of TREA 59 whenever EQUI 65 operates. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]

5.2.2 The provisions of 40 CFR pt. 60, subp. LL apply to the following affected facilities: Each crusher and screen in open-pit mines; each crusher, screen, bucket elevator, conveyor belt transfer point, thermal dryer, product packaging station, storage bin, enclosed storage area, truck loading station, truck unloading station, railcar loading station, and railcar unloading station at the mill or concentrator. The affected facilities contained within this group qualify as conveyor belt transfer points as defined in 40 CFR Section 60.381. [40 CFR 60.380(a), Minn. R. 7011.2700]

5.2.3 Total Particulate Matter <= 0.05 grams per dry standard cubic meter (0.022 gr/dscf) for any stack emissions from an affected facility. This limit applies individually to each emission unit in this group. [40 CFR 60.382(a), Minn. R. 7011.2700]

5.2.4 Opacity <= 10 percent opacity for any process fugitive emissions from an affected facility. This limit applies individually for each emission unit contained in this group. [40 CFR 60.382(b), Minn. R. 7011.2700]

5.2.5 In conducting the performance testing for total particulate matter from emission units contained in this group, Method 5 or 17 shall be used to determine the particulate matter concentration. The sample volume for each run shall be at least 1.70 dry standard cubic meters (60 dry standard cubic feet). The sampling probe and filter holder of Method 5 may be operated without heaters if the gas stream being sampled is at ambient temperature. For gas streams above ambient temperature, the Method 5 sampling train shall be operated with a probe and filter temperature slightly above the effluent temperature (up to a maximum filter temperature of 121 degrees Celsius (250 degrees Fahrenheit)) in order to prevent water condensation on the filter. To comply with 40 CFR Section 60.385(c), the Permittee shall use the monitoring devices in 40 CFR Sections 60.384(a) and (b) to determine the pressure loss of the gas stream through the scrubber and scrubbing liquid flow rate at any time during each particulate matter run, and the average of the three determinations shall be computed. [40 CFR 60.385(a), 40 CFR 60.386(b)(1), 40 CFR 60.386(c), 40 CFR 60.8(a), Minn. R. 7011.2700, Minn. R. 7017.2020, subp. 1]

COMG 3 Taconite MACT All Affected Sources

5.3.1 40 CFR pt. 63, subp. RRRRR applies to each new and existing affected source at a taconite ore processing plant. The affected sources are each new or existing ore crushing and handling operation,


Requirement number Requirement and citation ore dryer, indurating furnace, and finished pellet handling operation at a taconite ore processing plant, as defined in 40 CFR Section 63.9652. An ore crushing and handling operation, ore dryer, indurating furnace, and finished pellet handling operation at a taconite ore processing plant is existing if construction or reconstruction of the affected source commenced before December 18, 2002. An affected source is new if construction or reconstruction of the affected source commenced on or after December 18, 2002. An affected source is reconstructed if it meets the definition of reconstruction in 40 CFR Section 63.2. The requirements of the 40 CFR pt. 63, subp. RRRRR apply individually to each unit in this group unless otherwise stated. Additional requirements for 40 CFR pt. 63, subp. RRRRR are presented in COMG 4-6, COMG 16-17, COMG 19, and at each individual subject item in this group. [40 CFR 63.9582, Minn. R. 7011.8030]

5.3.2 The Permittee shall prepare, and at all times operate according to, a fugitive dust emissions control plan in accordance with the requirements in 40 CFR Section 63.9591 that describes in detail the measures that will be put in place to control fugitive dust emissions from stockpiles, material transfer points, plant roadways, tailings basin, pellet loading areas, and yard areas. [40 CFR 63.9591(a), 40 CFR 63.9624, 40 CFR 63.9635(a), Minn. R. 7011.8030]

5.3.3 A copy of the fugitive dust emissions control plan shall be submitted for approval to the Administrator on or before the applicable compliance date for the affected source as specified in 40 CFR Section 63.9583. [40 CFR 63.9591(b), 40 CFR 63.9624(b), Minn. R. 7011.8030]

5.3.4 The Permittee may use an existing fugitive dust emissions control plan provided it meets the following requirements: 1. The plans satisfies the requirements of 40 CFR Section 63.9591(a). 2. The plan describes the current measures to control fugitive dust emission sources. 3. The plan has been approved as part of a State implementation plan or title V permit. [40 CFR 63.9591(c), Minn. R. 7011.8030]

5.3.5 The Permittee shall maintain a current copy of the fugitive dust emissions control plan onsite, and it shall be available for inspection upon request. The Permittee shall keep the plan for the life of the affected source or until the affected source is no longer subject to the requirements of 40 CFR pt. 63, subp. RRRRR. [40 CFR 63.9591(d), 40 CFR 63.9635(b), Minn. R. 7011.8030]

5.3.6 Proper Operation and Maintenance. At all times, including periods of startup, shutdown, and malfunction, the Permittee shall operate and maintain the emission unit subject to the MACT standard and any associated air pollution control equipment and monitoring equipment, in a manner consistent with safety and good air pollution control practices for minimizing emissions at least to the levels required by 40 CFR pt. 63, subp. RRRRR. [40 CFR 63.6(e)(1)(i), 40 CFR 63.9600(a), Minn. R. 7011.7000, Minn. R. 7011.8030]

5.3.7 Operation and Maintenance Plan: Prepare, and at all times operate according to, a written operation and maintenance (O&M) plan for each control device used for compliance with any particulate matter emission limit in 40 CFR pt. 63, subp. RRRRR, Table 1 and to meet the requirement of each indurating furnace subject to good combustion practices (GCP). The O&M Plan shall contain the following components: 1. Preventative maintenance for each control device; 2. Corrective action procedures for bag leak detection systems; 3. Corrective action procedures for continuous parametric monitoring systems (CPMS) for air pollution control devices except baghouses; and 4. Good combustion practices for each indurating furnace.


Requirement number Requirement and citation The Permittee shall maintain a current copy of the O&M Plan onsite, and it must be available for inspection upon request. [40 CFR 63.9600(b), 40 CFR 63.9625(a) and (b), 40 CFR 63.9636(b), Minn. R. 7011.8030]

5.3.8 Preventative maintenance for each control device includes a preventative maintenance schedule that is consistent with the manufacturer's instructions for routine and long-term maintenance. [40 CFR 63.9600(b)(1), Minn. R. 7011.8030]

5.3.9 The Permittee shall be in compliance with the following requirements in 40 CFR Section 63.9610(a)(1)-(6) at all times, except during periods of startup, shutdown, and malfunction as defined in 40 CFR Section 63.2. 1. The emission limitations in 40 CFR Section 63.9590. 2. The work practice standards in 40 CFR Section 63.9591. 3. The operation and maintenance requirements in 40 CFR Section 63.9600. 4. The notification requirements in 40 CFR Section 63.9640. 5. The reporting requirements in 40 CFR Section 63.9641. 6. The recordkeeping requirements in 40 CFR Section 63.9642. [40 CFR 63.9610(a), Minn. R. 7011.8030]

5.3.10 During the period between the compliance date specified for the affected source in 40 CFR Section 63.9583 and the date upon which continuous monitoring systems have been installed and certified and any applicable operating limits have been set, the Permittee shall maintain a log detailing the operation and maintenance of the process and emissions control equipment. This includes the daily monitoring and recordkeeping of air pollution control device operating parameters as specified in 40 CFR Section 63.9590(b). [40 CFR 63.9610(b), Minn. R. 7011.8030]

5.3.11 The Permittee shall develop a written startup, shutdown, and malfunction plan according to the provisions in 40 CFR Section 63.6(e)(3). [40 CFR 63.9610(c), Minn. R. 7011.8030]

5.3.12 Startup, shutdown, and malfunction plan (SSMP). The Permittee shall develop a written SSMP that describes, in detail, procedures for operating and maintaining the source during periods of startup, shutdown, and malfunction; and a program of corrective action for malfunctioning process, air pollution control, and monitoring equipment used to comply with the relevant standard. The plan requirements are further described in 40 CFR Section 63.6(e)(3)(i). [40 CFR 63.6(e)(3)(i), 40 CFR 63.8(c)(1)(iii), 40 CFR 63.9610(c), Minn. R. 7011.7000, Minn. R. 7011.8030]

5.3.13 Performance test methods and other procedures: The Permittee shall conduct each performance test according to the requirements in section 40 CFR Section 63.7(e)(1) and 40 CFR Section 63.9621(b) and (c) for purposes of 40 CFR pt. 63, subp. RRRRR. [40 CFR 63.9621(a), Minn. R. 7011.8030]

5.3.14 Operating limits may be changed for any air pollution control device as long as the Permittee meets the following requirements from 40 CFR Section 63.9622(f)(1)-(3): 1. Submit a written notification to the Commissioner of your request to conduct a new performance test to revise the operating limit. 2. Conduct a performance test to demonstrate compliance with the applicable emission limitation in Table 1 to 40 CFR pt. 63, subp. RRRRR. 3. Establish revised operating limits according to the applicable procedures in 40 CFR Section 63.9622(a)-(e). [40 CFR 63.9622(f), Minn. R. 7011.8030]

5.3.15 The Permittee shall develop and make available for inspection upon request a site-specific monitoring plan that address the following requirements for each CPMS required in 40 CFR Section 63.9631: 1. Installation of the CPMS sampling probe or other interface at a measurement location relative to each affected emission unit such that the measurement is representative of control of the exhaust emissions (e.g., on or downstream of the last control device).


Requirement number Requirement and citation 2. Performance and equipment specifications for the sample interface, the parametric signal analyzer, and the data collection and reduction system. 3. Performance evaluation procedures and acceptance criteria (e.g., calibrations). 4. Ongoing operation and maintenance procedures in accordance with the general requirements of 40 CFR Sections 63.8(c)(1), (3), (4)(ii), (7), and (8). 5. Ongoing data quality assurance procedures in accordance with 40 CFR Section 63.8(d). 6. Ongoing recordkeeping and reporting procedures in accordance with 40 CFR Sections 63.10(c), (e)(1), and (e)(2)(i). 7. Corrective action procedures to be followed in the event an air pollution control device, except for a baghouse, exceeds an established operating limit as required in 40 CFR Section 63.9600(b)(3). [40 CFR 63.9625(d), 40 CFR 63.9632(b), Minn. R. 7011.8030]

5.3.16 Unless otherwise specified, each CPMS shall meet the following requirements: 1. Each CPMS shall complete a minimum of one cycle of operation for each successive 15-minute period and shall have valid data for at least 95 percent of every daily averaging period. 2. Each CPMS shall determine and record the daily average of all recorded readings. [40 CFR 63.9632(c), Minn. R. 7011.8030]

5.3.17 The Permittee shall conduct a performance evaluation of each CPMS in accordance with the site-specific monitoring plan. [40 CFR 63.9632(d), Minn. R. 7011.8030]

5.3.18 The Permittee shall operate and maintain the CPMS in continuous operation according to the site-specific monitoring plan. [40 CFR 63.9632(e), Minn. R. 7011.8030]

5.3.19 General Monitoring Requirements: except for monitoring malfunctions, associated repairs, and required quality assurance (including as applicable, calibration checks and required zero and span adjustments), the Permittee shall monitor continuously (or collect data at all required intervals) at all times an affected source is operating. Data recorded during monitoring malfunctions, associated repairs, and required QA/QC activities shall not be used in data averages and calculations used to report emissions or operating levels, or to fulfill a minimum data availability requirement. The Permittee shall use all the data collected during all other periods in assessing compliance. [40 CFR 63.9633, Minn. R. 7011.8030]

5.3.20 If the daily average operating parameter value for an emission unit or group of similar emission units does not meet the corresponding established operating limit, the Permittee must then follow the following procedures: 1. The Permittee must initiate and complete initial corrective action within 10 calendar days and demonstrate that the initial corrective action was successful. During any period of corrective action, the Permittee must continue to monitor and record all required operating parameters for equipment that remains in operation. After 10 calendar days, measure and record the daily average operating parameter value for the emission unit or group of similar emission units on which corrective action was taken. After the initial corrective action, if the daily average operating parameter value for the emission unit or group of similar emission units meets the operating limit established for the corresponding unit or group, then the corrective action was successful and the emission unit or group of similar emission units is in compliance with established operating limits and no reportable deviation occurred. 2. If the initial corrective action required in (1) was not successful, then the Permittee must complete additional corrective action within 10 calendar days and demonstrate that the subsequent corrective action was successful. During any period of corrective action, you must continue to monitor and record all required operating parameters for equipment that remains in operation. After the second set of 10 calendar days allowed to implement corrective action, the Permittee must again measure and record the daily average operating parameter value for the emission unit or group of similar


Requirement number Requirement and citation emission units. If the daily average operating parameter value for the emission unit or group of similar emission units meets the operating limit established for the corresponding unit or group, then the corrective action was successful and the emission unit or group of similar emission units is in compliance with established operating limits and no reportable deviation occurred. 3. If the second attempt at corrective action required in (2) was not successful, then the Permittee must repeat the procedures until the corrective action is successful. If the third attempt at corrective action is unsuccessful, the Permittee must conduct another performance test in accordance with the procedures in 40 CFR section 63.9622(f) and report to the Commissioner as a deviation the third unsuccessful attempt at corrective action. 4. After the third unsuccessful attempt at corrective action, the Permittee shall submit the written report required in (3) within 5 calendar days after the third unsuccessful attempt at corrective action. This report must notify the Commissioner that a deviation has occurred and document the types of corrective measures taken to address the problem that resulted in the deviation of established operating parameters and the resulting operating limits. [40 CFR 63.9634(j), 40 CFR 63.9641(e), Minn. R. 7011.8030]

5.3.21 The Permittee shall: 1. Perform preventative maintenance for each control device in accordance with 40 CFR section 63.9600(b)(1) and recording all information needed to document conformance with these requirements. 2. Initiate and complete corrective actions for a bag leak detection system alarm in accordance with 40 CFR section 63.9600(b)(2) and record all the information needed to document conformance with these requirements. 3. Initiate and complete corrective actions for a CPMS when an established operating limit for an air pollution control device, except for a baghouse, is exceeded in accordance with 40 CFR Section 63.9600(b)(3) and record all information needed to document conformance with these requirements. 4. Implement and maintain site-specific good combustion practices for each indurating furnace in accordance with 40 CFR Section 63.9600(b)(4) and record all information needed to document conformance with these requirements. [40 CFR 63.9636(a), Minn. R. 7011.8030]

5.3.22 Deviations. The Permittee shall report each instance in which an emission limitation was not met. This includes periods of startup, shutdown, and malfunction. The Permittee shall report each instance in which a work practice standard in 40 CFR section 63.9591 was not met. The Permittee must report each instance in which an applicable operation and maintenance requirement in 40 CFR section 63.9600 was not met. These deviations must be reported in accordance with the requirements in 40 CFR Section 63.9641. Deviations that occur during a period of startup, shutdown, or malfunction are not violations if the Permittee demonstrates to the Commissioner's satisfaction the Permittee was operating in accordance with 40 CFR Section 63.6(e)(1). [40 CFR 63.9637(a)-(b), Minn. R. 7011.8030]

5.3.23 Immediate startup, shutdown, and malfunction report. Any time an action taken by the Permittee during a startup or shutdown or malfunction (that caused the source to exceed any applicable emission limitation in the relevant emission standards), that is not consistent with the procedures specified in the affected source's SSM Plan, the Permittee shall report the actions taken for that event within 2 working days after commencing the actions followed by a letter within 7 working days after the end of the event. The reports must be in accordance with 40 CFR Section 63.10(d)(5)(ii). The report shall include: 1. Certification of accuracy of the report by a responsible official;


Requirement number Requirement and citation 2. Explanation of circumstances of the event; 3. Reasons for not following the SSM Plan; 4. Description of all excess emissions and/or CPMS monitoring exceedances which have occurred; and 5. Actions taken to minimize emissions in conformance with 40 CFR Section 63.6(e)(1)(i). [40 CFR 63.10(d)(5)(ii), 40 CFR 63.6(e)(3)(iv), 40 CFR 63.9641(c), Minn. R. 7011.8030, Minn. R. 7019.0100, subp. 2]

5.3.24 Part 70 monitoring report. The Permittee shall report all deviations as defined in 40 CFR pt. 63, subp. RRRRR in the semiannual monitoring report required by 40 CFR 70.6(a)(3)(iii)(A) or 40 CFR 71.6(a)(3)(iii)(A). If you submit a compliance report for an affected source along with, or as part of, the semiannual monitoring report required by 40 CFR 70.6(a)(3)(iii)(A) or 40 CFR 71.6(a)(3)(iii)(A), and the compliance report includes all the required information concerning deviations from any emission limitation or operation and maintenance requirement in 40 CFR pt. 63, subp. RRRRR, submission of the compliance report satisfies any obligation to report the same deviations in the semiannual monitoring report. However, submission of a compliance report does not otherwise affect any obligation you may have to report deviations from permit requirements for an affected source to your permitting authority. [40 CFR 63.9641(d), Minn. R. 7011.8030]

5.3.25 Recordkeeping. The Permittee shall keep the following records: 1. A copy of each notification and report that you submitted to comply with 40 CFR pt. 63, subp. RRRRR. 2. The records in 40 CFR Section 63.6(e)(3)(iii)-(v) related to startup, shutdown, and malfunction. 3. Records of performance tests and performance evaluations as required in 40 CFR Section 63.10(b)(2)(viii). 4. Records required by 40 CFR Sections 63.9634 through 63.9636 to show continuous compliance with each applicable emission limitation, work practice standard, and operation and maintenance requirement. [40 CFR 63.9642(a) and (c), Minn. R. 7011.8030]

5.3.26 Circumvention. The Permittee shall not build, erect, install, or use any article, machine, equipment, or process to conceal an emission that would otherwise constitute noncompliance with a relevant standard. Such concealment includes, but is not limited to: The use of diluents to achieve compliance with a relevant standard based on the concentration of a pollutant in the effluent discharged to the atmosphere. [40 CFR 63.4(b), Minn. R. 7011.7000]

5.3.27 After the effective date of any relevant standard promulgated under 40 CFR pt. 63, equipment added (or a process change) to an affected source that is within the scope of the definition of affected source under the relevant standard shall be considered part of the affected source and subject to all provisions of the relevant standard established for that affected source. [40 CFR 63.5(b)(6), Minn. R. 7011.7000]

5.3.28 Malfunctions shall be corrected as soon as practicable after their occurrence. [40 CFR 63.6(e)(1)(ii), Minn. R. 7011.7000]

5.3.29 When actions taken by the Permittee during a startup or shutdown (and the startup or shutdown causes the source to exceed any applicable emission limitation), or malfunction (including actions taken to correct a malfunction) are consistent with the procedures specified in the affected source's SSMP, the Permittee shall keep records which demonstrate that the procedures specified in the SSMP were followed and describes the actions taken for that event. [40 CFR 63.6(e)(3)(iii), Minn. R. 7011.7000]

5.3.30 If an action taken by the Permittee during a startup, shutdown, or malfunction (including an action taken to correct a malfunction) is not consistent with the procedures specified in the affected source's SSMP, and the source exceeds any applicable emission limitation in the relevant emission standard, then the Permittee shall record the actions taken for that event and shall report such actions as specified in 40 CFR Section 63.10(d)(5). [40 CFR 63.6(e)(3)(iv), Minn. R. 7011.7000]



5.3.31 The Permittee shall maintain at the affected source a current SSMP and shall make the plan available upon request for inspection and copying by the Commissioner and the Administrator. In addition, if the SSMP is subsequently revised, the Permittee shall maintain at the affected source each previous (i.e., superseded) version of the SSMP, and shall make each such previous version available for inspection and copying for a period of 5 years after revision of the SSMP. [40 CFR 63.6(e)(3)(v), Minn. R. 7011.7000]

5.3.32 To satisfy the requirements of this section to develop a SSMP, the Permittee may use a standard operating procedures (SOP) manual, or other plan, provided the alternative plans meet all the requirements and are made available for inspection or submission. [40 CFR 63.6(e)(3)(vi), Minn. R. 7011.7000]

5.3.33 The Commissioner or the Administrator may require that the Permittee make changes to the SSMP. Revisions to the SSMP will be required if the plan: 1. Does not address a startup, shutdown, or malfunction event that has occurred; 2. Fails to provide for the operation of the source (including associated air pollution control and monitoring equipment) during a startup, shutdown, or malfunction event in a manner consistent with the general duty to minimize emissions established by 40 CFR Section 63.6(e)(1)(i); 3. Does not provide adequate procedures for correcting malfunctioning process and/or air pollution control and monitoring equipment as quickly as practicable; or 4. Includes an event that does not meet the definition of startup, shutdown, or malfunction in 40 CFR Section 63.2. [40 CFR 63.6(e)(3)(vii), Minn. R. 7011.7000]

5.3.34 The Permittee may periodically revise the SSMP as necessary to satisfy the requirements of 40 CFR pt. 63, subp. A or to reflect changes in equipment or procedures at the affected source. Each such revision to a SSMP shall be reported in the semiannual report required by 40 CFR Section 63.10(d)(5). If the SSMP fails to address or inadequately addresses an event that meets the characteristics of a malfunction but was not included in the SSMP, the Permittee shall revise the SSMP within 45 days after the event in accordance with 40 CFR Section 63.6(e)(3)(viii). [40 CFR 63.6(e)(3)(viii), Minn. R. 7011.7000]

5.3.35 Any revisions made to the SSMP shall not be deemed to constitute permit revisions under 40 CFR pt. 70 or pt. 71 and elements of the SSMP shall not be considered an applicable requirement as defined in 40 CFR pt. 70 or pt. 71. [40 CFR 63.6(e)(3)(ix), Minn. R. 7011.7000]

5.3.36 Applicability. The non-opacity emission standards set forth in 40 CFR Section 63.6(f)(1)-(3) shall apply at all times except during periods of startup, shutdown, and malfunction, and as otherwise specified in 40 CFR pt. 63, subp. RRRRR. [40 CFR 63.6(f)(1), Minn. R. 7011.7000]

5.3.37 Methods for determining compliance will be, in part, based on the results of performance tests, conformance with operation and maintenance requirements, review of records, and inspection of the source as specified in 40 CFR Section 63.6(f)(2). The Permittee may use the results of performance testing conducted previously if it meets the requirements of 40 CFR Section 63.6(f)(iii). [40 CFR 63.6(f)(2), Minn. R. 7011.7000]

5.3.38 Finding of compliance. The Commissioner or the Administrator will make a finding concerning an affected source's compliance with a non-opacity emission standard upon obtaining all the compliance information required by the relevant standard and information available to the Commissioner or the Administrator pursuant to 40 CFR Section 63.6(e)(1)(i). [40 CFR 63.6(f)(3), Minn. R. 7011.7000]

5.3.39 Notification of performance test. 1. The Permittee shall notify the Commissioner and the Administrator of their intention to conduct a performance test at least 60 calendar days before the performance test is initially scheduled to begin. 2. In the event the Permittee is unable to conduct the performance test on the date specified due to unforeseeable circumstances, the Permittee shall notify the Commissioner and the Administrator as


Requirement number Requirement and citation soon as practicable and without delay prior to the scheduled performance test date and specify the date when the performance test is rescheduled. [40 CFR 63.7(b), 40 CFR 63.9(e), Minn. R. 7017.2015, Minn. R. 7019.0100]

5.3.40 Submission of site-specific test plan. Before conducting a required performance test, the Permittee shall develop and, if requested by the Commissioner or the Administrator, shall submit a site-specific test plan for approval in accordance with the requirements of 40 CFR Section 63.7(c)(2). [40 CFR 63.7(c)(2), Minn. R. 7017.2015]

5.3.41 Approval of site-specific test plan. The Administrator will notify the Permittee of approval or intention to deny approval of the site-specific test plan (if review of the site-specific test plan is requested) within 30 calendar days after receipt of the original plan and within 30 calendar days after receipt of any supplementary information. [40 CFR 63.7(c)(3), Minn. R. 7017.2015]

5.3.42 Performance testing facilities. The Permittee, at the request of the Commissioner or the Administrator, shall provide performance testing facilities as specified in 40 CFR Section 63.7(d). [40 CFR 63.7(d), Minn. R. 7017.2015]

5.3.43 Conduct of performance tests. 1. Performance tests shall be conducted under conditions based on representative performance (i.e., performance based on normal operating conditions) of the affected source. Operations during periods of startup, shutdown, and malfunction shall not constitute representative conditions for the purpose of a performance test, nor shall emissions in excess of the relevant standard during periods of startup, shutdown, and malfunction be considered a violation of the relevant standards unless a determination of noncompliance is made under 40 CFR Section 63.6(e). 2. Performance tests shall be conducted and data shall be reduced in accordance with the test methods and procedures set forth in 40 CFR Section 63.7(e), in each relevant standard, and, if required, in applicable appendices of 40 CFR pts. 51, 60, 61, and 63. The Commissioner has delegation to approve a minor or intermediate modification to a reference method or specified monitoring procedure as allowed in 40 CFR Section 63.7(e)(2)(i) and (ii). [40 CFR 63.7(e)(1)-(2), Minn. R. 7017.2015]

5.3.44 Unless otherwise specified in a relevant standard or test method, each performance test shall consist of three separate runs using the applicable test method. Each run shall be conducted for the time and under the conditions specified in the relevant standard. For the purpose of determining compliance with a relevant standard, the arithmetic mean of the results of the three runs shall apply, unless otherwise approved in accordance with provisions of 40 CFR Section 63.7(e)(3). [40 CFR 63.7(e)(3), Minn. R. 7017.2015]

5.3.45 Data analysis, recordkeeping, and reporting. Unless otherwise specified in a relevant standard or test method, or as otherwise approved by the Commissioner or Administrator in writing, results of a performance test shall include the analysis of samples, determination of emissions, and raw data. A performance test is "completed" when field sample collection is terminated. The Permittee shall report the results of the performance test to the Commissioner or Administrator before the close of business on the 60th day following the completion of the performance test, unless specified otherwise in a relevant standard or as approved otherwise in writing. The results of the performance test shall be submitted as part of the notification of compliance status required under 40 CFR Section 63.9(h) to the appropriate permitting authority. [40 CFR 63.7(g), Minn. R. 7017.2015]

5.3.46 All CMS required under relevant standards shall be subject to the provisions of 40 CFR Section 63.8 upon promulgation of performance specifications for CMS as specified in the relevant standard or otherwise by the Administrator. [40 CFR 63.8(a)(2), Minn. R. 7017.1010]

5.3.47 Conduct of monitoring. Monitoring shall be conducted as set forth in 40 CFR Section 63.8(b)(1). [40 CFR 63.8(b)(1), Minn. R. 7017.1010]

5.3.48 When the emissions from two or more affected sources are combined before being released to the


Requirement number Requirement and citation atmosphere, the owner or operator may install an applicable CMS for each emission stream or for the combined emissions streams, provided the monitoring is sufficient to demonstrate compliance with the relevant standard unless otherwise stated in 40 CFR Section 63.8(b)(2). [40 CFR 63.8(b)(2), Minn. R. 7017.1010]

5.3.49 Operation and maintenance of continuous monitoring systems. The Permittee shall maintain and operate each CMS in a manner consistent with good air pollution control practices. 1. The Permittee shall keep the necessary parts for routine repairs of the affected CMS equipment readily available. 2. The Permittee shall ensure the read out, or other indication of operation, from any CMS required for compliance with the emission standard is readily accessible on site for operational control or inspection. 3. All CMS shall be installed, operational, and the data verified prior to or in conjunction with conducting performance tests. Verification of operational status shall, at a minimum, include completion of the manufacturer's written specifications or recommendations for installation, operation, and calibration of the system. 4. A CMS is out of control if: i) The zero (low-level), mid-level (if applicable), or high-level calibration drift (CD) exceeds two times the applicable CD specification in the applicable performance specification or in the relevant standard; or ii) The CMS fails a performance test audit (e.g., cylinder gas audit), relative accuracy audit, relative accuracy test audit, or linearity test audit. 5. The Permittee shall submit all information concerning out-of-control periods, including start and end dates and hours and descriptions of corrective actions taken, in the excess emissions and continuous monitoring system performance report. [40 CFR 63.8(c)(1)-(3), 40 CFR 63.8(c)(7)-(8), Minn. R. 7017.1010]

5.3.50 When the CMS is out of control, the Permittee shall take the necessary corrective action and shall repeat all necessary tests which indicate that the system is out of control until the performance requirements are below the applicable limits. The beginning of the out-of-control period is the hour the Permittee conducts a performance check (e.g., calibration drift) that indicates an exceedance of the performance requirements established under this part. The end of the out-of-control period is the hour following the completion of corrective action and successful demonstration that the system is within the allowable limits. During the period the CMS is out of control, recorded data shall not be used in data averages and calculations, or to meet any data availability requirement. [40 CFR 63.8(c)(7)(ii), Minn. R. 7017.1010]

5.3.51 The Permittee shall develop and implement a CMS quality control program. As part of the quality control program, the Permittee shall develop and submit to the Commissioner or Administrator for approval upon request a site-specific performance evaluation test plan for the CMS performance evaluation required in 40 CFR Section 63.8(e)(3)(i). Each quality control program shall include, at a minimum, a written protocol that describes procedures for each of the following operations: i) Initial and any subsequent calibration of the CMS; ii) Determination and adjustment of the calibration drift of the CMS; iii) Preventive maintenance of the CMS, including spare parts inventory; iv) Data recording, calculations, and reporting; v) Accuracy audit procedures, including sampling and analysis methods; and vi) Program of corrective action for a malfunctioning CMS. [40 CFR 63.8(d), Minn. R. 7017.1010]



5.3.52 The Permittee shall keep these written procedures on record for the life of the affected source, to be made available for inspection, upon request. The Permittee shall keep previous versions of the performance evaluation plan on record to be made available for inspection upon request, for a period of 5 years after each revision to the plan. Written procedures may be incorporated into the SSMP to avoid duplication of planning and recordkeeping efforts. [40 CFR 63.8(d), Minn. R. 7017.1010]

5.3.53 Performance evaluation of continuous monitoring systems. 1. When required by a relevant standard, and at any other time the Administrator may require, the Permittee shall conduct a performance evaluation of the CMS according to the applicable specifications and procedures described in 40 CFR Section 63.8(e) or in the relevant standard. 2. Reporting performance evaluation results. The Permittee shall furnish the Commissioner and the Administrator a copy of a written report of the results of the performance evaluation simultaneously with the results of the performance test or within 60 days of completion of the performance evaluation if no test is required, unless otherwise specified in a relevant standard. [40 CFR 63.8(e), Minn. R. 7017.1010]

5.3.54 Reduction of monitoring data. The Permittee shall reduce the monitoring data as specified in 40 CFR Section 63.8(g)(1)-(4). [40 CFR 63.8(g), Minn. R. 7017.1010]

5.3.55 Additional notification requirements for sources with CMS. The Permittee shall submit to the Commissioner and the Administrator written notification as follows: 1. A notification of the date the CMS performance evaluation under 40 CFR Section 63.8(e) is scheduled to begin, submitted simultaneously with the notification of the performance test date required under 40 CFR Section 63.7(b). If no performance test is required, or if the requirement to conduct a performance test has been waived, the Permittee shall notify the Commissioner and the Administrator in writing of the date of the performance evaluation at least 60 calendar days before the evaluation is scheduled to begin; 2. A notification that the criterion necessary to continue use of an alternative to relative accuracy testing, as provided by 40 CFR Section 63.8(f)(6), has been exceeded. The notification shall be delivered or postmarked not later than 10 days after the occurrence of such exceedance, and it shall include a description of the nature and cause of the increased emissions. [40 CFR 63.10(e)(2), 40 CFR 63.8(e), 40 CFR 63.9(g), Minn. R. 7017.1010, Minn. R. 7019.0100]

5.3.56 Notification of compliance status. Each time a notification of compliance status is required under 40 CFR pt. 63, subp. A, the Permittee shall submit to the Commissioner a notification of compliance status containing the information required by 40 CFR Section 63.9(h), signed by the responsible official who shall certify its accuracy, attesting to whether the source has complied with the relevant standard. The notification shall be sent by the 60th day following the completion of the relevant compliance demonstration activity specified in the relevant standard. [40 CFR 63.9(h), Minn. R. 7019.0100]

5.3.57 Notification. Any change in the information already provided under 40 CFR Section 63.9 shall be provided to the Commissioner and the Administrator in writing within 15 calendar days after the change. [40 CFR 63.9(j), Minn. R. 7019.0100]

5.3.58 The Permittee shall submit reports to the Commissioner and shall send a copy of each report to the Administrator. [40 CFR 63.10(a), Minn. R. 7019.0100]

5.3.59 Recordkeeping. The Permittee shall maintain files of all information (including all reports and notifications) required by 40 CFR pt. 63 in a form suitable and readily available for expeditious inspection and review. The files shall be retained for at least 5 years following the date of each occurrence, measurement, maintenance, corrective action, report, or record. At a minimum, the most recent 2 years of data shall be retained on site. [40 CFR 63.10(b)(1), Minn. R. 7019.0100, subp. 2(B)]



5.3.60 The Permittee shall maintain, at a minimum, the following information in the files: 1. The occurrence and duration of each startup or shutdown when the startup or shutdown causes the source to exceed any applicable emission limitation in the relevant emission standard; 2. The occurrence and duration of each malfunction of the process equipment or of the air pollution control equipment and monitoring equipment; 3. All maintenance performed on the pollution control equipment; 4. Actions taken during periods of startup or shutdown when the source exceeded applicable emission limitations in a relevant standard and when such actions are different from the procedures specified in the affected source's startup, shutdown, and malfunction plan (SSMP); 5. Actions taken during periods of malfunction (including corrective actions to restore malfunction process and air pollution control and monitoring equipment to its normal or usual manner of operation) when the actions taken are different from the procedures specified in the SSMP; 6. All information necessary to demonstrate conformance with the affected source's SSMP and actions taken in accordance with SSMP; 7. Each period during which a continuous monitoring system (CMS) is malfunctioning or inoperative; 8. All required measurements needed to demonstrate compliance with a relevant standard; 9. All results of performance test and CMS performance evaluations; 10. All measurements as may be necessary to determine the conditions of performance tests and performance evaluations; 11. All CMS calibration checks; 12. All adjustments and maintenance performed on CMS; 13. Any information demonstrating whether a source is meeting the requirements for a waiver of record keeping or reporting requirements under this part; and 14. All documents supporting initial notifications and notifications of compliance status. [40 CFR 63.10(b)(2), Minn. R. 7019.0100, subp. 2(B)]

5.3.61 Periodic startup, shutdown, and malfunction reports. If actions taken by a Permittee during a startup or shutdown (and the startup or shutdown causes the source to exceed any applicable emission limitation in the relevant emission standards), or malfunction of an affected source (including actions taken to correct a malfunction) are consistent with the procedures specified in the source's startup, shutdown, and malfunction plan, the Permittee shall state such information in a startup, shutdown, and malfunction report. Actions taken to minimize emissions during such startups, shutdowns, and malfunctions shall be summarized in the report and may be done in checklist form. Such a report shall also include the number, duration, and a brief description for each type of malfunction which occurred during the reporting period and which caused or may have caused any applicable emission limitation to be exceeded. Reports shall only be required if a startup or shutdown caused the source to exceed any applicable emission limitation, or if a malfunction occurred during the reporting period. The startup, shutdown, and malfunction report shall consist of a letter, containing the name, title, and signature of the Permittee who is certifying its accuracy, that shall be submitted to the Commissioner and the Administrator semiannually. [40 CFR 63.10(d)(5)(i), Minn. R. 7019.0100, subp. 2(B)]

5.3.62 Startup, shutdown, and malfunction report: due 30 days following the end of each calendar half-year. The Permittee may submit this simultaneously with the excess emissions and continuous monitoring system performance (or other) reports. The Permittee may request approval to reduce the frequency of reporting following the procedures specified in 40 CFR Section 63.10(e)(3). [40 CFR 63.10(d)(5)(i), Minn. R. 7019.0100, subp. 2(B)]

5.3.63 Immediate startup, shutdown, and malfunction reports. Notwithstanding the allowance to reduce the frequency of reporting for periodic startup, shutdown, and malfunction reports, any time an action taken by a Permittee during a startup or shutdown that caused the source to exceed any applicable


Requirement number Requirement and citation emission limitation in the relevant emission standards, or malfunction is not consistent with the procedures specified in the affected source's SSMP, the Permittee shall report the actions taken for that event within 2 working days after commencing actions inconsistent with the plan followed by a letter within 7 working days after the end of the event. The immediate report required under 40 CFR Section 63.10(d)(5)(ii) shall consist of a telephone call (or facsimile (FAX) transmission) to the Commissioner and the Administrator within 2 working days after commencing actions inconsistent with the plan, and it shall be followed by a letter, delivered or postmarked within 7 working days after the end of the event. The report shall contain the information specified in 40 CFR Section 63.10(d)(5)(ii). [40 CFR 63.10(d)(5)(ii), Minn. R. 7019.0100, subp. 2(B)]

5.3.64 Additional reporting requirements for sources with continuous monitoring systems. The Permittee shall furnish the Commissioner and the Administrator a copy of a written report of the results of the CMS performance evaluation, as required in 40 CFR section 63.8(e), simultaneously with the results of the performance test, unless otherwise specified in the relevant standard. [40 CFR 63.10(e)(2), Minn. R. 7019.0100, subp. 2(B)]

5.3.65 Excess emissions and continuous monitoring system performance report and summary report. Excess emissions and parameter monitoring exceedances are defined in relevant standards. The Permittee shall submit an excess emissions and continuous monitoring system performance report and/or a summary report to the Commissioner and the Administrator semiannually. [40 CFR 63.10(e)(3)(i)-(iv), Minn. R. 7019.0100]

5.3.66 Content and submittal dates for excess emissions and monitoring system performance reports. All excess emissions and monitoring system performance reports and all summary reports, if required, shall be delivered or postmarked by the 30th day following the end of each calendar half. Written reports of excess emissions or exceedances of process or control system parameters shall include all the information required in 40 CFR Section 63.10(c)(5)-(13), in 40 CFR Section 63.8(c)(7) and 40 CFR Section 63.8(c)(8), and in the relevant standard, and they shall contain the name, title, and signature of the responsible official who is certifying the accuracy of the report. When no excess emissions or exceedances of a parameter have occurred, or a CMS has not been inoperative, out of control, repaired, or adjusted, such information shall be stated in the report. [40 CFR 63.10(e)(3)(v), Minn. R. 7019.0100]

5.3.67 Summary report. One summary report shall be submitted for the hazardous air pollutants monitored at each affected source (unless the relevant standard specifies that more than one summary report is required. The summary report shall be entitled "Summary Report-Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance" and shall contain the information specified in 40 CFR Section 63.10(e)(3)(vi). [40 CFR 63.10(e)(3)(vi), Minn. R. 7019.0100]

5.3.68 If the total duration of excess emissions or process or control system parameter exceedances for the reporting period is 1 percent or greater of the total operating time for the reporting period, or the total CMS downtime for the reporting period is 5 percent or greater of the total operating time for the reporting period, both the summary report and the excess emissions and continuous monitoring system performance report shall be submitted. [40 CFR 63.10(e)(3)(vii), Minn. R. 7019.0100]

COMG 4 Taconite MACT Existing Ore Crushing and Handling

5.4.1 40 CFR pt. 63, subp. RRRRR applies to each new and existing affected source at a taconite ore processing plant. The affected sources contained within this group qualify as existing ore crushing and handling operations at a taconite ore processing plant, as defined in 40 CFR Section 63.9652. An ore crushing and handling operation at a taconite ore processing plant is existing if construction or reconstruction of the affected source commenced before December 18, 2002. An affected source is new if construction or reconstruction of the affected source commenced on or after December 18, 2002. An affected source is reconstructed if it meets the definition of reconstruction in 40 CFR Section


Requirement number Requirement and citation 63.2. The requirements of the 40 CFR pt. 63, subp. RRRRR apply individually to each unit in this group unless otherwise stated. [40 CFR 63.9582, Minn. R. 7011.8030]

5.4.2 The Permittee must comply with the flow-weighted mean concentration of particulate matter discharged to the atmosphere from the affected source, as determined using the procedures in 40 CFR Section 63.9621(b), such that Total Particulate Matter <= 0.008 grains per dry standard cubic foot. For each ore crushing and handling affected source, the Permittee must determine compliance with the emission limit for particulate matter by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). [40 CFR 63.9590(a), 40 CFR 63.9621(b), 40 CFR pt. 63, subp. RRRRR(Table 1), Minn. R. 7011.8030]

5.4.3 The Permittee may elect to group a maximum of six similar emission units together and conduct an initial compliance test on one representative emission unit within each group of similar units. The determination of whether emission units are similar shall meet the criteria of 40 CFR Section 63.6920(f). If testing representative emission units, the Permittee shall prepare and submit a testing plan as described in 40 CFR Section 63.6920(g). [40 CFR 63.9620(e), Minn. R. 7011.8030]

5.4.4 For emission units not selected for initial performance testing and defined within a group of similar emission units in accordance with 40 CFR Section 63.9620(e), the Permittee shall calculate the daily average value of each operating parameter for the similar air pollution control device applied to each similar emission unit within a defined group using the following equation. Pk = (sum of all Pi)/n Pk = Daily average operating parameter value for all emission units within group k; Pi = Daily average parametric monitoring parameter value corresponding to emission unit i within the group; and n = Total number of emission units within the group, including emission units that have been selected for performance tests and those that have not been selected for performance tests. [40 CFR 63.9634(b)(3), Minn. R. 7011.8030]

COMG 5 Taconite MACT Existing Indurating Furnaces

5.5.1 40 CFR pt. 63, subp. RRRRR applies to each new and existing affected source at a taconite ore processing plant. The affected sources contained within this group qualify as existing grate kiln indurating furnaces at a taconite ore processing plant, as defined in 40 CFR Section 63.9652. An indurating furnace at a taconite ore processing plant is existing if construction or reconstruction of the affected source commenced before December 18, 2002. An affected source is new if construction or reconstruction of the affected source commenced on or after December 18, 2002. An affected source is reconstructed if it meets the definition of reconstruction in 40 CFR Section 63.2. The requirements of the 40 CFR pt. 63, subp. RRRRR apply individually to each unit in this group unless otherwise stated. [40 CFR 63.9582, Minn. R. 7011.8030]

5.5.2 The Permittee must comply with the flow-weighted mean concentration of particulate matter discharged to the atmosphere from the affected source, as determined using the procedures in 40 CFR Section 63.9621(c), such that Total Particulate Matter <= 0.01 grains per dry standard cubic foot. For each indurating furnace affected source, the Permittee must determine compliance with the emission limit for particulate matter by following the test methods and procedures in 40 CFR Section 63.9621(c)(1)-(3). [40 CFR 63.9590(a), 40 CFR 63.9621(c), 40 CFR pt. 63, subp. RRRRR(Table 1), Minn. R. 7011.8030]

5.5.3 Good combustion practices for indurating furnaces: Identify and implement a set of site-specific GCP


Requirement number Requirement and citation for each type of indurating furnace at the facility. These GCP should correspond to standard operating procedures for maintaining proper and efficient combustion within each indurating furnace. Good combustion practices include, but are not limited to, the elements listed below: 1. Proper operating conditions for each indurating furnace (e.g., minimum combustion temperature, maximum carbon monoxide concentration in the furnace exhaust gases, burner alignment, or proper fuel-air distribution/mixing). 2. Routine inspection and preventative maintenance and corresponding schedules of each indurating furnace. 3. Performance analyses of each indurating furnace. 4. Keeping applicable operator logs. 5. Keeping applicable records to document compliance with each element. [40 CFR 63.9600(b)(4), Minn. R. 7011.8030]

COMG 6 Taconite MACT Existing Finished Pellet Handling

5.6.1 40 CFR pt. 63, subp. RRRRR applies to each new and existing affected source at a taconite ore processing plant. The affected sources contained within this group qualify as existing finished pellet handling operations at a taconite ore processing plant, as defined in 40 CFR Section 63.9652. A finished pellet handling operation at a taconite ore processing plant is existing if construction or reconstruction of the affected source commenced before December 18, 2002. An affected source is new if construction or reconstruction of the affected source commenced on or after December 18, 2002. An affected source is reconstructed if it meets the definition of reconstruction in 40 CFR Section 63.2. The requirements of the 40 CFR pt. 63, subp. RRRRR apply individually to each unit in this group unless otherwise stated. [40 CFR 63.9582, Minn. R. 7011.8030]

5.6.2 The Permittee must comply with the flow-weighted mean concentration of particulate matter discharged to the atmosphere from the affected source, as determined using the procedures in 40 CFR Section 63.9621(b), such that Total Particulate Matter <= 0.008 grains per dry standard cubic foot. For each finished pellet handling affected source, the Permittee must determine compliance with the emission limit for particulate matter by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). [40 CFR 63.9590(a), 40 CFR 63.9621(b), 40 CFR pt. 63, subp. RRRRR(Table 1), Minn. R. 7011.8030]

5.6.3 The Permittee may elect to group a maximum of six similar emission units together and conduct an initial compliance test on one representative emission unit within each group of similar units. The determination of whether emission units are similar shall meet the criteria of 40 CFR Section 63.6920(f). If testing representative emission units, the Permittee shall prepare and submit a testing plan as described in 40 CFR Section 63.6920(g). [40 CFR 63.9620(e), Minn. R. 7011.8030]

5.6.4 For emission units not selected for initial performance testing and defined within a group of similar emission units in accordance with 40 CFR Section 63.9620(e), the Permittee shall calculate the daily average value of each operating parameter for the similar air pollution control device applied to each similar emission unit within a defined group using the following equation. Pk = (sum of all Pi)/n Pk = Daily average operating parameter value for all emission units within group k; Pi = Daily average parametric monitoring parameter value corresponding to emission unit i within the group; and n = Total number of emission units within the group, including emission units that have been selected for performance tests and those that have not been selected for performance tests. [40 CFR


Requirement number Requirement and citation 63.9634(b)(3), Minn. R. 7011.8030]

COMG 8 Wet Scrubber (Title V Requirements)

5.7.1 If the Permittee replaces any existing wet scrubber, adds new wet scrubbers, or modifies the wet scrubbers listed in COMG 8, such equipment is subject to all of the requirements of COMG 8, all applicable requirements of COMG 3 and COMG 16, and all of the requirements at the TREA ID of the wet scrubber that is being modified or replaced. Prior to making such a change, the Permittee shall apply for and obtain the appropriate permit amendment, as applicable. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.7.2 The requirements of COMG 8 apply individually to each control device listed in COMG 8. This includes each replaced wet scrubber as allowed by COMG 8. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.7.3 The Permittee shall operate and maintain the wet scrubber at all times that any emission unit controlled by the wet scrubber is in operation. The Permittee shall document periods of non-operation of the wet scrubber. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.7.4 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for Total Particulate Matter >= 94 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.7.5 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for PM < 10 micron >= 84 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.7.6 The Permittee shall operate and maintain the wet scrubber in accordance with the Operation and Maintenance (O & M) Plan. The Permittee shall keep copies of the O & M Plan available onsite for use by staff and MPCA staff. [Minn. R. 7007.0800, subp. 14]

5.7.7 Recordkeeping of Pressure Drop and Water Flow Rate. The Permittee shall record the time and date of each pressure drop and water flow rate reading and whether or not the recorded pressure drop or water flow rate was within the range specified in this permit. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.7.8 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the recorded pressure drop is outside the required operating range; - the recorded water flow is outside the required operating range; or - the wet scrubber or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop to within the permitted range and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the wet scrubber. The Permittee shall keep a record of the type and date of any corrective action taken for each scrubber. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5]

5.7.9 Monitoring Equipment: The Permittee shall install and maintain the necessary monitoring equipment for measuring and recording pressure drop and water flow rate as required by this permit. The monitoring equipment must be installed, in use, and properly maintained when the monitored wet scrubber is in operation. [Minn. R. 7007.0800, subp. 4]

5.7.10 Periodic Inspections: At least once per calendar quarter, or more frequently as required by the


Requirement number Requirement and citation manufacturing specifications, the Permittee shall inspect the control equipment components. The Permittee shall maintain a written record of these inspections. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5]

COMG 15 Replacement Pellet Reclaim Screening System

5.8.1 The provisions of 40 CFR pt. 60, subp. LL apply to the following affected facilities: Each crusher and screen in open-pit mines; each crusher, screen, bucket elevator, conveyor belt transfer point, thermal dryer, product packaging station, storage bin, enclosed storage area, truck loading station, truck unloading station, railcar loading station, and railcar unloading station at the mill or concentrator. The affected facilities contained within this group qualify as screens and conveyor belt transfer points as defined in 40 CFR Section 60.381. [40 CFR 60.380(a), Minn. R. 7011.2700]

5.8.2 Opacity <= 10 percent opacity for any process fugitive emissions from an affected facility. This limit applies individually to each emission unit in this group. [40 CFR 60.382(b), Minn. R. 7011.2700]

5.8.3 Process Throughput <= 334656 tons per year 12-month rolling sum (or equivalently, 298800 Long Tons/year) for the amount of pellets reclaimed. [Minn. R. 7007.0100, subp. 25(B), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.8.4 Process Throughput -- By the 15th of each month, the Permittee shall calculate and record: 1. The amount of pellets reclaimed in the previous month; and 2. The 12-month rolling sum of the amount of pellets reclaimed by summing the data of the previous 12 months. [Minn. R. 7007.0100, subp. 25(B), Title I Condition: Avoid major source under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.8.5 The Permittee shall comply with all applicable fugitive dust control provisions for the subject item set forth in the Fugitive Dust Control Plan, which can be found in Appendix E of this permit. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]

5.8.6 Visible Emissions Check: The Permittee shall check visible emissions once daily when in operation during daylight hours using the visible emissions checklist for all sources included in Appendix B. If, based on completion of the checklist, the Permittee determines that additional investigative or remedial action is required, the Permittee shall investigate process and control equipment, and, if necessary, implement appropriate corrective action. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.8.7 The Permittee shall keep records of fugitive emissions control measures taken by the facility for a minimum of five years. This includes visible emission checks, wind that delays operations, and training records. [Minn. R. 7007.0800, subp. 5]

5.8.8 The Permittee shall report the dates when fugitive dust is visible in a semiannual report to the Agency. The report shall also identify any fugitive emissions corrective actions taken by the facility. [Minn. R. 7007.0800, subp. 6]

COMG 16 Wet Scrubbers

5.9.1 For wet scrubbers, the Permittee shall establish site-specific operating limits according to the following procedures: 1. Using the CPMS required in 40 CFR Section 63.9631(b), measure and record the pressure drop and scrubber water flow rate every 15 minutes during each run of the particulate matter performance test. 2. Calculate and record the average pressure drop and scrubber water flow rate for each individual test run. Operating limits are established as the lowest average pressure drop and the lowest average scrubber water flow rate corresponding to any of the three test runs. [40 CFR 63.9622(a)(1)-(2), Minn. R. 7011.8030]



5.9.2 For any rod-deck venturi scrubber applied to an indurating furnace, the Permittee may establish a pressure drop operating limit by using historical average pressure drop data as allowed by 40 CFR Section 63.9622(a)(3). [40 CFR 63.9622(a)(3), Minn. R. 7011.8030]

5.9.3 For dynamic wet scrubbers, the Permittee shall establish site-specific operating limits according to the following procedures: 1. Using the CPMS required in 40 CFR Section 63.9631(b), measure and record the scrubber water flow rate and either the fan amperage or pressure drop every 15 minutes during each run of the particulate matter performance test. 2. Calculate and record the average scrubber water flow rate and either the average fan amperage or average pressure drop for each individual test run. Operating limits are established as the lowest average scrubber water flow rate and either the lowest average fan amperage or pressure drop value corresponding to any of the three test runs. [40 CFR 63.9622(b), Minn. R. 7011.8030]

5.9.4 Install, operate, and maintain a CPMS according to the requirements in 40 CFR Section 63.9632(b)-(e) and monitor: 1. For each wet scrubber, the daily average scrubber pressure drop and the daily average scrubber water flow rate according to the requirements in 40 CFR Section 63.9633; or 2. For each dynamic wet scrubber, the daily average scrubber water flow rate and either the daily average fan amperage or the daily average pressure drop according to the requirements in 40 CFR Section 63.9633. [40 CFR 63.9631(b)-(c), Minn. R. 7011.8030]

5.9.5 The Permittee shall demonstrate continuous compliance by: 1. Maintaining the daily average pressure drop and daily average scrubber water flow rate at or above the minimum levels established during the initial or subsequent performance test. 2. Operating and maintaining each wet scrubber CPMS according to 40 CFR Section 63.9632(b) and recording all information needed to document conformance with these requirements. 3. Collecting and reducing monitoring data for pressure drop and scrubber water flow rate according to 40 CFR Section 63.9632(c) and recording all information needed to document conformance with these requirements. 4. If the daily average pressure drop or daily average scrubber water flow rate is below the operating limits established for a corresponding emission unit or group of similar emission units, the Permittee must then follow the corrective action procedures in 40 CFR Section 63.9634(j). [40 CFR 63.9634(e), Minn. R. 7011.8030]

5.9.6 CPMS corrective action procedures for all air pollution control devices except baghouses: In the event the Permittee exceeds an established operating limit for an air pollution control device except for a baghouse, the Permittee shall initiate corrective action to determine the cause of the operating limit exceedance and complete the corrective action within 10 calendar days. The corrective action procedures shall be consistent with the installation, operation, and maintenance procedures listing in the site-specific CPMS monitoring plan in accordance with 40 CFR Section 63.9632(b). [40 CFR 63.9600(b)(3), Minn. R. 7011.8030]

COMG 17 Baghouses

5.10.1 The Permittee is authorized to install and operate fabric filters (TREA 14-16, 18-26, 28-31, and 35) on the associated emission units (EQUI 11-15, 17-24, 26, and 120-122). The fabric filters shall meet the requirements of COMG 17. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.10.2 If the Permittee replaces any existing fabric filter, adds new fabric filters, or modifies the fabric filters


Requirement number Requirement and citation listed in COMG 17, such equipment is subject to all of the requirements of COMG 17, all applicable requirements of COMG 3, and all of the requirements at the TREA ID of the fabric filter that is being modified or replaced. Prior to making such a change, the Permittee shall apply for and obtain the appropriate permit amendment, as applicable. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.10.3 The requirements of COMG 17 apply individually to each control device listed in COMG 17. This includes each new, modified, or replaced fabric filter as allowed by COMG 17. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.10.4 The Permittee shall operate and maintain the fabric filter at all times that any emission unit controlled by the fabric filter is in operation. The Permittee shall document periods of non-operation of the fabric filter. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



5.10.7 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for PM < 2.5 micron >= 93 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.10.8 The Permittee shall operate and maintain the fabric filter in accordance with the Operation and Maintenance (O & M) Plan. The Permittee shall keep copies of the O & M Plan available onsite for use by staff and MPCA staff. [Minn. R. 7007.0800, subp. 14]

5.10.9 The Permittee shall operate and maintain a bag leak detector at all times that the fabric filter and emission unit controlled by the fabric filter is in operation. Operation and maintenance of the bag leak detector shall be included in the O & M Plan. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]

5.10.10 Corrective action procedures for bag leak detection systems: In the event a bag leak detection system alarm is triggered, the Permittee shall initiate corrective action to determine the cause of the alarm within 1 hour of the alarm, initiate corrective action to correct the cause of the problem within 24 hours of the alarm, and complete the corrective action as soon as practicable. Corrective actions may include, but are not limited to the following: 1. Inspecting the baghouse for air leaks, torn or broken bags or filter media, or any other condition that may cause an increase in emissions. 2. Sealing off defective bags or filter media. 3. Replacing defective bags or filter media or otherwise repairing the control device. 4. Sealing off a defective baghouse compartment. 5. Cleaning the bag leak detection system probe, or otherwise repairing the bag leak detection system. 6. Adjusting the process operation producing the particulate emissions. [40 CFR 63.9600(b)(2), Minn. R. 7011.8030]

5.10.11 Install, operate, and maintain a bag leak detection system to monitor the relative change in particulate matter loadings according to the requirements in 40 CFR Section 63.9632(a), and conduct inspections at their specified frequencies according to the following requirements:


Requirement number Requirement and citation 1. Monitor the pressure drop across each baghouse cell each day to ensure pressure drop is within the normal operating range. 2. Confirm that dust is being removed from hoppers through weekly visual inspections or other means of ensuring the proper functioning of removal mechanisms. 3. Check the compressed air supply of pulse-jet baghouses each day. 4. Monitor cleaning cycles to ensure proper operation using an appropriate methodology. 5. Check bag cleaning mechanisms for proper functioning through monthly visual inspections or equivalent means. 6. Make monthly visual checks of bag tension on reverse air and shaker-type baghouses to ensure that bags are not kinked (kneed or bent) or lying on their sides. You do not have to make this check for shaker-type baghouses that have self-tensioning (spring-loaded) devices. 7. Confirm the physical integrity of the baghouse through quarterly visual inspections of the baghouse interior for air leaks. 8. Inspect fans for wear, material buildup, and corrosion through quarterly visual inspections, vibration detectors, or equivalent means. [40 CFR 63.9631(a), Minn. R. 7011.8030]

5.10.12 Bag Leak Detection System Requirements: Each negative or positive pressure baghouse equipped with a stack used for compliance with 40 CFR pt. 63, subp. RRRRR shall meet the following requirements: 1. The system shall be certified by the manufacturer to be capable of detecting emissions of particulate matter at concentrations of 10 milligrams per actual cubic meter (0.0044 grains per actual cubic foot) or less. 2. The system shall provide output of relative changes in particulate matter loadings. 3. The system shall be equipped with an alarm that will sound when an increase in relative particulate loadings is detected over the alarm level set point established according to 40 CFR Section 63.9632(a)(4). The alarm shall be located such that it can be heard by the appropriate plant personnel. [40 CFR 63.9632(a)(1)-(3), Minn. R. 7011.8030]

5.10.13 Bag Leak Detection System Monitoring Plan: For each baghouse used for compliance with 40 CFR pt. 63, subp. RRRRR, develop and implement a Bag Leak Detection System Monitoring Plan. The plan shall be submitted to MPCA for approval. The plan shall describe: 1. Installation of the bag leak detection system. 2. Initial and periodic adjustment of the bag leak detection system including how the alarm set-point will be established. 3. Operation of the bag leak detection system including quality assurance procedures. 4. How the bag leak detection system will be maintained including a routine maintenance schedule and spare parts inventory list. 5. How the bag leak detection system output shall be recorded and stored. [40 CFR 63.9632(a)(4), Minn. R. 7011.8030]

5.10.14 To make the initial adjustment of the bag leak detection system, the Permittee shall establish the baseline output by adjusting the sensitivity (range) and the averaging period of the device. Then, establish the alarm set points and the alarm delay time (if applicable). Following initial adjustment, the Permittee shall not adjust the averaging period, alarm set point, or alarm delay time, without approval from the Commissioner except once per quarter, the Permittee may adjust the sensitivity of the bag leak detection system to account for seasonal effects, including temperature and humidity, according to the procedures identified in the site-specific monitoring plan required under 40 CFR Section 63.9632(a)(4). Where multiple detectors are required, the system's instrumentation and alarm may be shared


Requirement number Requirement and citation among detectors. The bag leak detector sensor must be installed downstream of the baghouse and upstream of any wet scrubber. [40 CFR 63.9632(a)(5)-(8), Minn. R. 7011.8030]

5.10.15 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the alarm for the bag leak detector is triggered; or - the recorded pressure drop is outside the required operating range; or - the fabric filter or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop to within the permitted range and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the fabric filter. The Permittee shall keep a record of the type and date of any corrective action taken for each filter. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5]

5.10.16 For each baghouse required to meet any particulate emission limit in Table 1 of 40 CFR pt. 63, subp. RRRRR, the Permittee shall demonstrate continuous compliance by: 1. Maintaining records of the time corrective action was initiated in the event of a bag leak detection system alarm, the corrective action(s) taken, and the date on which corrective action was completed. 2. Inspecting and maintaining each baghouse according to the requirements in 40 CFR Section 63.9631(a)(1)-(8) and recording all information needed to document conformance with these requirements. If the Permittee increases or decreases the sensitivity of the bag leak detection system beyond the limits specified in the site-specific monitoring plan, the Permittee shall include a copy of the required written certification by a responsible official in the next semiannual compliance report. [40 CFR 63.9634(d), Minn. R. 7011.8030]

5.10.17 Pressure Drop: Recordkeeping of Pressure Drop. The Permittee shall record the time and date of each pressure drop reading and whether or not the recorded pressure drop was within the range specified in this permit. [Minn. R. 7007.0800, subps. 4-5]

COMG 19 Baghouses (Subject to CAM)

5.11.1 The Permittee is authorized to install and operate fabric filters (TREA 17, 27, and 32-34) on the associated emission units (EQUI 27, 119, and 123-125). The fabric filters shall meet the requirements of COMG 19. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.11.2 If the Permittee replaces any existing fabric filter, adds new fabric filters, or modifies the fabric filters listed in COMG 19, such equipment is subject to all of the requirements of COMG 19, all applicable requirements of COMG 3, and all requirements at the TREA ID of the fabric filter that is being modified or replaced. Prior to making such a change, the Permittee shall apply for and obtain the appropriate permit amendment, as applicable. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.11.3 The requirements of COMG 19 apply individually to each control device listed in COMG 19. This includes each new, modified, or replaced fabric filter as allowed by COMG 19. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.11.4 The Permittee shall operate and maintain the fabric filter at all times that any emission unit controlled by the fabric filter is in operation. The Permittee shall document periods of non-operation of the fabric filter. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]






5.11.8 The Permittee shall operate and maintain the fabric filter in accordance with the Operation and Maintenance (O & M) Plan. The Permittee shall keep copies of the O & M Plan available onsite for use by staff and MPCA staff. [Minn. R. 7007.0800, subp. 14]

5.11.9 The Permittee shall operate and maintain a bag leak detector at all times that the fabric filter and emission unit controlled by the fabric filter is in operation. Operation and maintenance of the bag leak detector shall be included in the O & M Plan. [40 CFR 64.3, Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7017.0200]

5.11.10 Corrective action procedures for bag leak detection systems: In the event a bag leak detection system alarm is triggered, the Permittee shall initiate corrective action to determine the cause of the alarm within 1 hour of the alarm, initiate corrective action to correct the cause of the problem within 24 hours of the alarm, and complete the corrective action as soon as practicable. Corrective actions may include, but are not limited to the following: 1. Inspecting the baghouse for air leaks, torn or broken bags or filter media, or any other condition that may cause an increase in emissions. 2. Sealing off defective bags or filter media. 3. Replacing defective bags or filter media or otherwise repairing the control device. 4. Sealing off a defective baghouse compartment. 5. Cleaning the bag leak detection system probe, or otherwise repairing the bag leak detection system. 6. Adjusting the process operation producing the particulate emissions. [40 CFR 63.9600(b)(2), Minn. R. 7011.8030]

5.11.11 Install, operate, and maintain a bag leak detection system to monitor the relative change in particulate matter loadings according to the requirements in 40 CFR Section 63.9632(a), and conduct inspections at their specified frequencies according to the following requirements: 1. Monitor the pressure drop across each baghouse cell each day to ensure pressure drop is within the normal operating range. 2. Confirm that dust is being removed from hoppers through weekly visual inspections or other means of ensuring the proper functioning of removal mechanisms. 3. Check the compressed air supply of pulse-jet baghouses each day. 4. Monitor cleaning cycles to ensure proper operation using an appropriate methodology. 5. Check bag cleaning mechanisms for proper functioning through monthly visual inspections or equivalent means. 6. Make monthly visual checks of bag tension on reverse air and shaker-type baghouses. 7. Confirm the physical integrity of the baghouse through quarterly visual inspections of the baghouse interior for air leaks. 8. Inspect fans for wear, material buildup, and corrosion through quarterly visual inspections,


Requirement number Requirement and citation vibration detectors, or equivalent means. [40 CFR 63.9631(a), Minn. R. 7011.8030]

5.11.12 Bag Leak Detection System Requirements: Each negative or positive pressure baghouse equipped with a stack used for compliance with 40 CFR pt. 63, subp. RRRRR shall meet the following requirements: 1. The system shall be certified by the manufacturer to be capable of detecting emissions of particulate matter at concentrations of 10 milligrams per actual cubic meter (0.0044 grains per actual cubic foot) or less. 2. The system shall provide output of relative changes in particulate matter loadings. 3. The system shall be equipped with an alarm that will sound when an increase in relative particulate loadings is detected over the alarm level set point established according to 40 CFR Section 63.9632(a)(4). The alarm shall be located such that it can be heard by the appropriate plant personnel. [40 CFR 63.9632(a)(1)-(3), Minn. R. 7011.8030]

5.11.13 Bag Leak Detection System Monitoring Plan: For each baghouse used for compliance with 40 CFR pt. 63, subp. RRRRR, develop and implement a Bag Leak Detection System Monitoring Plan. The plan shall be submitted to MPCA for approval. The plan shall describe: 1. Installation of the bag leak detection system. 2. Initial and periodic adjustment of the bag leak detection system including how the alarm set-point will be established. 3. Operation of the bag leak detection system including quality assurance procedures. 4. How the bag leak detection system will be maintained including a routine maintenance schedule and spare parts inventory list. 5. How the bag leak detection system output shall be recorded and stored. [40 CFR 63.9632(a)(4), Minn. R. 7011.8030]

5.11.14 To make the initial adjustment of the bag leak detection system, the Permittee shall establish the baseline output by adjusting the sensitivity (range) and the averaging period of the device. Then, establish the alarm set points and the alarm delay time (if applicable). Following initial adjustment, the Permittee shall not adjust the averaging period, alarm set point, or alarm delay time, without approval from the Commissioner except once per quarter, the Permittee may adjust the sensitivity of the bag leak detection system to account for seasonal effects, including temperature and humidity, according to the procedures identified in the site-specific monitoring plan required under 40 CFR Section 63.9632(a)(4). Where multiple detectors are required, the system's instrumentation and alarm may be shared among detectors. The bag leak detector sensor must be installed downstream of the baghouse and upstream of any wet scrubber. [40 CFR 63.9632(a)(5)-(8), Minn. R. 7011.8030]

5.11.15 For each baghouse required to meet any particulate emission limit in Table 1 of 40 CFR pt. 63, subp. RRRRR, the Permittee shall demonstrate continuous compliance by: 1. Maintaining records of the time corrective action was initiated in the event of a bag leak detection system alarm, the corrective action(s) taken, and the date on which corrective action was completed. 2. Inspecting and maintaining each baghouse according to the requirements in 40 CFR Section 63.9631(a)(1)-(8) and recording all information needed to document conformance with these requirements. If the Permittee increases or decreases the sensitivity of the bag leak detection system beyond the limits specified in the site-specific monitoring plan, the Permittee shall include a copy of


Requirement number Requirement and citation the required written certification by a responsible official in the next semiannual compliance report. [40 CFR 63.9634(d), Minn. R. 7011.8030]

5.11.16 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the alarm for the bag leak detector is triggered; or - the recorded pressure drop is outside the required operating range; or - the fabric filter or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop to within the permitted range and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the fabric filter. The Permittee shall keep a record of the type and date of any corrective action taken for each filter. [40 CFR 64.7(d), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5, Minn. R. 7017.0200]

5.11.17 The Permittee shall maintain records of monitoring data, monitor performance data, corrective actions taken, and other supporting information required to be maintained. The Permittee may maintain records on alternative media, such as microfilm, computer files, magnetic tape disks, or microfiche, provided that the use of such alternative media allows for expeditious inspection and review, and does not conflict with other applicable recordkeeping requirements. [40 CFR 64.9(b), Minn. R. 7017.0200]

5.11.18 Pressure Drop: Recordkeeping: The Permittee shall record the time and date of each pressure drop reading and whether or not the observed pressure drop was within the range specified in this permit. Recorded values outside the range specified in this permit are considered Deviations as defined by Minn. R. 7007.0100, subp. 8a. [40 CFR 64.3, Minn. R. 7007.0800, subps. 4-5, Minn. R. 7017.0200]

5.11.19 The Permittee shall calibrate the pressure gauge at least once every 12 months and shall maintain a written record of any action resulting from the calibration. [40 CFR 64.3, Minn. R. 7017.0200]

5.11.20 Periodic Inspections: At least once per calendar quarter, or more frequently as required by the manufacturing specifications, the Permittee shall inspect the control equipment components. The Permittee shall maintain a written record of these inspections. [40 CFR 64.3, Minn. R. 7017.0200]

5.11.21 Documentation of Need for Improved Monitoring: If the Permittee fails to achieve compliance with an emission limitation or standard for which the monitoring did not provide an indication of an excursion or exceedance while providing valid data, or the results of compliance or performance testing document a need to modify the existing pressure drop range, the Permittee shall promptly notify the MPCA and, if necessary, submit a permit amendment application to address the necessary monitoring change. [40 CFR 64.7(e), Minn. R. 7017.0200]

5.11.22 As required by 40 CFR Section 64.9(a)(2), for the Semi-Annual Deviations Report required by this permit and/or the Notification of Deviations Endangering Human Health and the Environment required by this permit, as applicable, the Permittee shall include the following related to the monitoring identified as required by 40 CFR pt. 64: 1) Summary information on the number, duration, and cause of excursions or exceedances, as applicable, and the corrective action taken; and 2) Summary information on the number, duration, and cause for monitor downtime incidents. [40 CFR 64.9(a)(2), Minn. R. 7017.0200]

COMG 20 Fluxstone Storage Building Space Heaters

5.12.1 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. This limit applies individually to each emission unit in this group. [Minn. R. 7011.0610, subp. 1(A)(1)]

5.12.2 Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. This limit applies individually to each emission unit in this group. [Minn. R. 7011.0610, subp.


Requirement number Requirement and citation 1(A)(2)]

5.12.3 Fuel type: Natural gas only by design. This requirement applies individually to each emission unit in this group. [Minn. R. 7005.0100, subp. 35a]

COMG 22 Fluxstone Storage Building NSPS Subpart OOO Affected Facilities

5.13.1 The Permittee shall vent emissions from EQUI 176 to control equipment meeting the requirements of TREA 4 whenever EQUI 176 operates. The Permittee shall vent emissions from EQUI 177 to control equipment meeting the requirements of TREA 5 whenever EQUI 177 operates. The Permittee shall vent emissions from EQUI 178 to control equipment meeting the requirements of TREA 5 whenever EQUI 178 operates. The Permittee shall vent emissions from EQUI 179 to control equipment meeting the requirements of TREA 6 whenever EQUI 179 operates. The Permittee shall vent emissions from EQUI 183 to control equipment meeting the requirements of TREA 6 whenever EQUI 183 operates. The Permittee shall vent emissions from EQUI 205 to control equipment meeting the requirements of TREA 6 whenever EQUI 205 operates. [Minn. R. 7011.0075, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.13.2 The provisions of 40 CFR pt. 60, subp. OOO apply to the following affected facilities: Each crusher, grinding mill, screening operation, bucket elevator, belt conveyor, bagging operation, storage bin, and enclosed truck or railcar loading station. An affected facility that commences construction, modification, or reconstruction after August 31, 1983, is subject to the requirements of 40 CFR pt. 60, subp. OOO. The affected facilities contained within this group qualify as storage bins and belt conveyors as defined in 40 CFR Section 60.671. [40 CFR 60.670, Minn. R. 7011.3350]

5.13.3 Opacity <= 7 percent opacity for fugitive emissions from the building openings. This limit applies to the building enclosing the affected facilities contained within this group. [40 CFR 60.672(e)(1), 40 CFR pt. 60, subp. OOO(Table 3), Minn. R. 7011.3350]

5.13.4 In determining compliance with the particulate matter standards in 40 CFR Section 60.672(e)(1), the Permittee shall use Method 9 of 40 CFR pt. 60, Appendix A-4 and the procedures in 40 CFR Section 60.11, with the following additions: - The minimum distance between the observer and the emission source shall be 4.57 meters (15 feet). - The observer shall, when possible, select a position that minimizes interference from other fugitive emission sources (e.g., road dust). The required observer position relative to the sun (Method 9 of 40 CFR pt. 60, Appendix A-4, Section 2.1) must be followed. [40 CFR 60.675(c)(1), Minn. R. 7011.3350]

5.13.5 When determining compliance with the fugitive emissions standard for any affected facility described under 40 CFR Section 60.672(e)(1), the duration of the Method 9 (40 CFR pt. 60, Appendix A-4) observations must be 30 minutes (five 6-minute averages). Compliance with the applicable fugitive emission limits in 40 CFR pt. 60, subp. OOO, Table 3 must be based on the average of the five 6-minute averages. [40 CFR 60.675(c)(3), Minn. R. 7011.3350]

5.13.6 To demonstrate compliance with the fugitive emission limits for buildings specified in 40 CFR Section 60.672(e)(1), the Permittee must complete the testing specified in 40 CFR Section 60.675(d)(1). Performance tests must be conducted while all affected facilities inside the building are operating. [40 CFR 60.675(d), Minn. R. 7011.3350]

5.13.7 Recordkeeping: The Permittee shall maintain records of the occurrence and duration of any startup, shutdown, or malfunction in the operation of the facility including; any malfunction of the air pollution control equipment; or any periods during which a continuous monitoring system or monitoring device is inoperative. [40 CFR 60.7(b), Minn. R. 7019.0100, subp. 1]



5.13.8 Recordkeeping: The Permittee shall maintain a file of all measurements, maintenance, reports and records for at least five years. This requirement is more stringent than 40 CFR Section 60.7(f), which specifies two years. [40 CFR 60.7(f), Minn. R. 7007.0800, subp. 5(C), Minn. R. 7019.0100, subp. 1]


5.13.10 The Permittee shall submit written reports of the results of all performance tests conducted to demonstrate compliance with the standards set forth in 40 CFR Section 60.672, including reports of opacity observations made using Method 9 (40 CFR pt. 60, Appendix A-4) to demonstrate compliance with 40 CFR Section 60.672(e). [40 CFR 60.676(f), Minn. R. 7011.3350]

5.13.11 The Permittee shall submit a notification of any physical or operational change which increases emission rate: due 60 days (or as soon as practical) before the change is commenced. [40 CFR 60.7(a)(4), Minn. R. 7019.0100, subp. 1]

5.13.12 The Permittee shall submit a notification of anticipated date for conducting opacity observations : Due 30 calendar days before Opacity Observation Date. For performance tests involving only Method 9 (40 CFR pt. 60, Appendix A-4) testing, the Permittee may reduce the 30-day advance notification of performance test in 40 CFR Sections 60.7(a)(6) and 60.8(d) to a 7-day advance notification. [40 CFR 60.675(g), 40 CFR 60.7(a)(6), Minn. R. 7011.3350, Minn. R. 7019.0100, subp. 1]

EQUI 9 Crude Ore Unloading

5.14.1 The Permittee shall vent emissions from EQUI 9 to fabric filters meeting the permit requirements for COMG 3, COMG 17, TREA 84, and TREA 86. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.14.2 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the industrial process equipment is controlled by control equipment which has a collection efficiency of 85% by weight, this industrial process equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0715, subps. 1(A)and 3]

5.14.3 Opacity <= 20 percent opacity. [Minn. R. 7011.0715, subp. 1(B)]

5.14.4 Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 16(J)]

5.14.5 Gas Stream Pressure Drop: Monitor and record once per week when in operation once the pressure gauges are installed. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

EQUI 11 Third Stage Crusher 1

5.15.1 The Permittee shall vent emissions from the third stage crusher, EQUI 11, to a wet scrubber meeting the permit requirements for COMG 3, COMG 4, COMG 8, COMG 16, and TREA 82 until the initial startup of the fabric filter, TREA 18, at which point the Permittee shall vent emissions from the third stage crusher, EQUI 11, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 18. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.15.2 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735.


Requirement number Requirement and citation Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the industrial process equipment is controlled by control equipment which has a collection efficiency of 85% by weight, this industrial process equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0715, subps. 1(A)and 3]











5.18.1 The Permittee shall vent emissions from the third stage crusher, EQUI 14, to a wet scrubber meeting the permit requirements for COMG 3, COMG 4, COMG 8, COMG 16, and TREA 65 until the initial startup of the fabric filter, TREA 21, at which point the Permittee shall vent emissions from the third


Requirement number Requirement and citation stage crusher, EQUI 14, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 21. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]




5.19.1 The Permittee shall vent emissions from the third stage crusher, EQUI 15, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 22. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



EQUI 17 Fourth Stage Crusher 1

5.20.1 The Permittee shall vent emissions from the fourth stage crusher, EQUI 17, to a wet scrubber meeting the permit requirements for COMG 3, COMG 4, COMG 8, COMG 16, and TREA 46 until the initial startup of the fabric filter, TREA 23, at which point the Permittee shall vent emissions from the fourth stage crusher, EQUI 17, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 23. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.20.2 Total Particulate Matter <= 0.0077 grains per dry standard cubic foot 3-hour average (standard cubic feet of exhaust gas). [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.20.3 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the unit is controlled by control equipment which has a collection efficiency of 85% by weight, this industrial process equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0710, subps. 1(A)and 3]



5.20.4 PM < 10 micron <= 0.0100 grains per dry standard cubic foot 3-hour average (standard cubic feet of exhaust gas). [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.20.5 PM < 2.5 micron <= 0.0100 grains per dry standard cubic foot 3-hour average (standard cubic feet of exhaust gas). [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.20.6 Opacity <= 20 percent opacity except for one six-minute per hour of not more than 60 percent opacity. [Minn. R. 7011.0710, subp. 1(B)]











5.22.3 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn.


Requirement number Requirement and citation R. 7011.0735. Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the unit is controlled by control equipment which has a collection efficiency of 85% by weight, this industrial process equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0710, subps. 1(A)and 3]












5.24.1 The Permittee shall vent emissions from the fourth stage crusher, EQUI 21, to a wet scrubber meeting the permit requirements for COMG 3, COMG 4, COMG 8, COMG 16, and TREA 50 until the initial startup of the fabric filter, TREA 26, at which point the Permittee shall vent emissions from the fourth stage crusher, EQUI 21, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and


Requirement number Requirement and citation TREA 26. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]







5.25.1 The Permittee shall vent emissions from the fourth stage crusher, EQUI 22, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 14. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]







5.26.1 The Permittee shall vent emissions from the fourth stage crusher, EQUI 23, to a fabric filter meeting


Requirement number Requirement and citation the permit requirements for COMG 3, COMG 17, and TREA 15. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]







5.27.1 The Permittee shall vent emissions from the fourth stage crusher, EQUI 24, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 16. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]






EQUI 26 Transfer House North

5.28.1 The Permittee shall vent emissions from the transfer house north, EQUI 26, to a wet scrubber


Requirement number Requirement and citation meeting the permit requirements for COMG 3, COMG 4, COMG 8, COMG 16, and TREA 40 until the initial startup of the fabric filter, TREA 29, at which point the Permittee shall vent emissions from the transfer house north, EQUI 26, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 29. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



EQUI 27 Transfer House South

5.29.1 The Permittee shall vent emissions from the transfer house south, EQUI 27, to a fabric filter meeting the permit requirements for COMG 3, COMG 19, and TREA 17. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



EQUI 33 Limestone Storage Bins

5.30.1 The Permittee shall vent emissions from EQUI 33 to control equipment meeting the requirements of TREA 10 whenever EQUI 33 operates. [Minn. R. 7011.0075, subp. 1]



EQUI 34 Additive Rail Unloading

5.31.1 The Permittee shall vent emissions from EQUI 34 to TREA 71 whenever EQUI 34 operates, and


Requirement number Requirement and citation operate and maintain TREA 71 at all times that any emissions are vented to TREA 71. The Permittee shall document periods of non-operation of the control equipment. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]



5.31.4 Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.31.5 Gas Stream Pressure Drop: Monitor and record once per week when in operation. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

EQUI 35 Line 2 Binder Storage Bins

5.32.1 The Permittee shall vent emissions from EQUI 35 to TREA 75 whenever EQUI 35 operates, and operate and maintain TREA 75 at all times that any emissions are vented to TREA 75. The Permittee shall document periods of non-operation of the control equipment. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]



5.32.4 Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 14]


EQUI 37 Binder Storage Bins / Additive Mixing


5.33.2 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth,


Requirement number Requirement and citation and is located at least 1/4 mile from any residence or public roadway, and the industrial process equipment is controlled by control equipment which has a collection efficiency of 85% by weight, this industrial process equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0715, subps. 1(A)and 3]


EQUI 41 Line 2 Pellet Cooler Exhaust



5.34.3 Operate, maintain, and monitor the condition of the pellet cooler dump zone hopper to prevent excess air infiltration, in order to minimize pellet cooler particulate matter emissions. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

EQUI 45 Line 1 Pellet Induration

5.35.1 The Permittee shall vent emissions from EQUI 45 to control equipment meeting the requirements of TREA 91 whenever EQUI 45 operates. [Minn. R. 7011.0075, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.2 Particulate Matter <= 72.1 tons per year 12-month rolling sum sum to be calculated by the 15th day of each month for the previous 12-month period as described later in this permit. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.35.3 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the unit is controlled by control equipment which has a collection efficiency of 85% by weight, this direct heating equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0610, subp. 1(A)(1), Minn. R. 7011.0710, subp. 3]

5.35.4 PM < 10 micron <= 143 tons per year 12-month rolling sum to be calculated by the 15th day of each month for the previous 12-month period as described later in this permit. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.35.5 PM < 2.5 micron <= 143.0 tons per year 12-month rolling sum to be calculated by the 15th day of each month for the previous 12-month period as described later in this permit. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.35.6 Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R. 7011.0610, subp. 1(A)(2)]

5.35.7 Sulfur Dioxide <= 106.3 tons 30-day rolling sum rolled daily. This condition restricts SO2 emissions from EQUI 45 to 1293 tons per year. [Title I Condition: Avoid major modification under 40 CFR


Requirement number Requirement and citation 52.21(b)(2) and Minn. R. 7007.3000]

5.35.8 Sulfur Dioxide <= 4 pounds per million Btu heat input when burning solid fossil fuels. If more than one fuel is burned simultaneously, calculate the emission limit as indicated in Minn. R. 7011.0605. [Minn. R. 7011.0610, subp. 2(B)]

5.35.9 Sulfur Dioxide <= 2 pounds per million Btu heat input when burning liquid fossil fuels. If more than one fuel is burned simultaneously, calculate the emission limit as indicated in Minn. R. 7011.0605. [Minn. R. 7011.0610, subp. 2(B)]

5.35.10 Nitrogen Oxides <= 816 tons 180-day rolling sum rolled daily. This condition restricts NOx emissions from EQUI 45 to 1655 tons per year. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.11 Sulfuric Acid Mist <= 6.25 tons 30-day rolling sum rolled daily. This restricts sulfuric acid mist emissions from EQUI 45 to 76.1 tons per year. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.12 Fuel Usage: Except as noted in the Alternative Fuels Testing Authorization provisions, fuels are limited to pulverized coal, blends of coal and petroleum coke, natural gas and distillate oil. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.13 Fuel Usage: Natural gas only by design for the preheat burners. [Minn. R. 7005.0100, subp. 35a]

5.35.14 Opacity: Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(B)]

5.35.15 Sulfur Dioxide: Emissions Monitoring: The Permittee shall operate a continuous emission monitoring system (CEMS) to measure emissions from EQUI 45. [Minn. R. 7017.1006, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.16 Sulfur Dioxide: Corrective actions: The Permittee shall monitor SO2 emissions on a lb/hr basis using concentration data (ppm) from an SO2 monitor and volumetric flow measurements from an in-stack flow meter. Emissions in excess of 515 lb SO2/hr will be identified as an excursion. When an excursion occurs, the Permittee shall conduct an inspection and perform corrective actions as necessary to prevent an exceedance of Minn. R. 7011.0610. The Permittee shall record the date and time that each excursion occurs, the duration of the excursion, and the emissions rate during the excursion. The Permittee shall record its response to the excursion. The Permittee shall maintain this information on-site for a minimum of five years. It shall be made available for the MPCA upon request. [40 CFR 64.3(b)(4)(ii), Minn. R. 7017.0200]

5.35.17 Prior to the installation and certification of a continuous emissions monitor system (CEMS) for SO2 for EQUI 45, the Permittee shall comply with the following conditions: Fuel Sulfur and BTU Content Monitoring: The Permittee shall analyze the weekly fuel composite samples for sulfur content in weight percent and heating value in BTU per pound, in accordance with current ASTM Methods. Sulfur Dioxide Emissions Calculation: Within 21 days after the end of a calendar week, the Permittee shall calculate the SO2 emissions rate in lbs/MMBtu from the results of the weekly fuel composite analysis, and the SO2 control efficiency of 25 percent or the value directly determined by recent performance testing - whichever is lower in value. The Permittee shall maintain a record of the


Requirement number Requirement and citation analysis, calculations, and emission rate. [Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4(B)]

5.35.18 Beginning with the certification of a continuous emissions monitoring system (CEMS) for SO2 for EQUI 45, the Permittee shall comply with the following conditions: Fuel BTU Content Monitoring: The Permittee shall analyze the weekly fuel composite samples for heating value in BTU per pound, in accordance with current ASTM Methods. Sulfur Dioxide Emissions Calculation (lb/MMBtu): Within 21 days after the end of a calendar week, the Permittee shall calculate and record the SO2 emissions rate in lbs/MMBtu for each 3-hour rolling period from the calendar week using the results of the weekly fuel composite analysis and stack CEMS measurements. The Permittee shall also calculate and record the emission limit for each 3-hour rolling period during the calendar week from the records of fuel inputs and fuel energy content. The Permittee shall maintain a record of the analysis, calculations, emission limit, and emission rate. [Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4(B)]

5.35.19 Nitrogen Oxides: Emissions Monitoring: The Permittee shall operate a continuous emission monitoring system (CEMS) to measure emissions from EQUI 45. [Minn. R. 7017.1006, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.20 Air Flow Rate: Emissions Monitoring: The Permittee shall operate a continuous emission monitoring system (CEMS) to measure flue gas flow rate from EQUI 45. [Minn. R. 7017.1006, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.21 Daily Recordkeeping. On each day of operation, the Permittee shall calculate, record, and maintain a record of pellet production from EQUI 45. This shall be based on written logs and/or electronic monitors. [Minn. R. 7007.0800, subps. 4(D) & 5(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.35.22 Fuel Usage: The Permittee shall monitor and record the type and quantity of each fuel entering the furnace each hour in a form that enables the Permittee to convert the data to the heat input (BTU) of each fuel type (solid, liquid, or gas) on an hourly basis. [Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4(B), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.23 Fuel Usage: Daily Recordkeeping: On each day of operation, the Permittee shall calculate, record, and maintain a record of the total tons of solid fuel, cubic feet of natural gas, and gallons of distillate oil used. This shall be based on fuel usage meter readings, written logs, and/or electronic monitors. [Minn. R. 7007.0800, subps. 4(D) & 5(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.35.24 Fuel Sampling: The Permittee shall collect a solid fuel sample each weekday from the pulverized fuel pipe. The Permittee shall form a weekly composite of all samples collected in a given calendar week. [Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4(B)]

5.35.25 Particulate Matter: Monthly Recordkeeping. By the end of the month, the Permittee shall calculate and record the following: 1) The total pellet production for the previous calendar month using the daily production records; 2) The total heat input for all combined fuel types and the total heat input for each fuel type (solid, liquid, or gas) for the previous calendar month; 3) The Particulate Matter emissions for the previous month using the formulas specified in Appendix H of this permit. The Permittee shall use the emission factors included in Appendix H of the permit


Requirement number Requirement and citation until receipt of a Notice of Compliance (NOC) letter that approves the most recent performance test result. At that time, the Permittee shall use the new emission factor as reset by the Protocol for Re-setting the Emission Factor Used for Calculation Particulate Matter Emissions in the formulas specified in Appendix H of this permit; and 4) The 12-month rolling sum Particulate Matter emissions for the previous 12-month period by summing the monthly Particulate Matter emissions data for the previous 12 months. [Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 5(A)]

5.35.26 PM < 10 micron: Monthly Recordkeeping. By the end of the month, the Permittee shall calculate and record the following: 1) The total pellet production for the previous calendar month using the daily production records; 2) The total heat input for all combined fuel types and the total heat input for each fuel type (solid, liquid, or gas) for the previous calendar month; 3) The PM10 emissions for the previous month using the formulas specified in Appendix H of this permit. The Permittee shall use the emission factors included in Appendix H of the permit until receipt of a Notice of Compliance (NOC) letter that approves the most recent performance test result. At that time, the Permittee shall use the new emission factor as reset by the Protocol for Re-setting the Emission Factor Used for Calculation Particulate Matter Emissions in the formulas specified in Appendix H of this permit; and 4) The 12-month rolling sum PM10 emissions for the previous 12-month period by summing the monthly PM10 emissions data for the previous 12 months. [Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 5(A)]

5.35.27 PM < 2.5 micron: Monthly Recordkeeping. By the end of the month, the Permittee shall calculate and record the following: 1) The total pellet production for the previous calendar month using the daily production records; 2) The total heat input for all combined fuel types and the total heat input for each fuel type (solid, liquid, or gas) for the previous calendar month; 3) The PM2.5 emissions for the previous month using the formulas specified in Appendix H of this permit. The Permittee shall use the emission factors included in Appendix H of the permit until receipt of a Notice of Compliance (NOC) letter that approves the most recent performance test result. At that time, the Permittee shall use the new emission factor as reset by the Protocol for Re-setting the Emission Factor Used for Calculation Particulate Matter Emissions in the formulas specified in Appendix H of this permit; and 4) The 12-month rolling sum PM2.5 emissions for the previous 12-month period by summing the monthly PM2.5 emissions data for the previous 12 months. [Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 5(A)]

5.35.28 Particulate Matter: Protocol for Re-Setting the Emission Factor Used For Calculating Particulate Matter Emissions: The Permittee shall conduct performance testing under conditions that produce the maximum emission rate, using US EPA Reference Method 5 and 202 to measure the emission factors as required elsewhere in this permit. The Permittee shall report the test result in pounds per long ton of pellets produced in the performance test report required by Minn. R. 7017.2035, subp. 1. For each type of fuel combusted, the emission factor used for calculating emissions shall be re-set to the 3-hour average emission rate in pounds per long ton of pellets produced, measured during the most recent MPCA-approved emission factor performance test. The new emission factors used for calculating emissions determined using this Protocol shall be effective upon receipt of the Notice of Compliance (NOC) letter that approves the test results and shall be incorporated into the permit during the next permit amendment. The Permittee shall follow this Protocol to independently determine the natural gas emission factors and the solid fuel emission factors. The new solid fuel emission factors determined using this Protocol


Requirement number Requirement and citation shall also apply to the distillate oil emission factors. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.35.29 Particulate Matter: The Permittee must apply for and obtain a major permit amendment if the Permittee wishes to deviate from the Protocol for Re-setting the Emission Factor Used for Calculating Particulate Matter Emissions established by this permit. [Minn. R. 7007.1500, subp. 1]

5.35.30 Particulate Matter: Notwithstanding the Protocol detailed above, the MPCA reserves the right to set operational limits and requirements as allowed under Minn. R. 7017.2025. If the MPCA sets limits, the new limits shall be implemented upon receipt of the NOC letter that notifies the Permittee of preliminary approval. The limits set according to Minn. R. 7017.2025 are final upon issuance of a permit amendment incorporating the change. [Minn. R. 7017.2025]

5.35.31 PM < 10 micron: Protocol for Re-Setting the Emission Factor Used For Calculating PM10 Emissions: The Permittee shall conduct performance testing under conditions that produce the maximum emission rate, using US EPA Reference Method 201A and 202 to measure the emission factors as required elsewhere in this permit. The Permittee shall report the test result in pounds per long ton of pellets produced in the performance test report required by Minn. R. 7017.2035, subp. 1. For each type of fuel combusted, the emission factor used for calculating emissions shall be re-set to the 3-hour average emission rate in pounds per long ton of pellets produced, measured during the most recent MPCA-approved emission factor performance test. The new emission factors used for calculating emissions determined using this Protocol shall be effective upon receipt of the Notice of Compliance (NOC) letter that approves the test results and shall be incorporated into the permit during the next permit amendment. The Permittee shall follow this Protocol to independently determine the natural gas emission factors and the solid fuel emission factors. The new solid fuel emission factors determined using this Protocol shall also apply to the distillate oil emission factors. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.35.32 PM < 10 micron: The Permittee must apply for and obtain a major permit amendment if the Permittee wishes to deviate from the Protocol for Re-setting the Emission Factor Used for Calculating PM10 Emissions established by this permit. [Minn. R. 7007.1500, subp. 1]

5.35.33 PM < 10 micron: Notwithstanding the Protocol detailed above, the MPCA reserves the right to set operational limits and requirements as allowed under Minn. R. 7017.2025. If the MPCA sets limits, the new limits shall be implemented upon receipt of the NOC letter that notifies the Permittee of preliminary approval. The limits set according to Minn. R. 7017.2025 are final upon issuance of a permit amendment incorporating the change. [Minn. R. 7017.2025]

5.35.34 PM < 2.5 micron: Protocol for Re-Setting the Emission Factor Used For Calculating PM2.5 Emissions: The Permittee shall conduct performance testing under conditions that produce the maximum emission rate, using US EPA Reference Method 201A and 202 to measure the emission factors as required elsewhere in this permit. The Permittee shall report the test result in pounds per long ton of pellets produced in the performance test report required by Minn. R. 7017.2035, subp. 1. For each type of fuel combusted, the emission factor used for calculating emissions shall be re-set to the 3-hour average emission rate in pounds per long ton of pellets produced, measured during the most recent MPCA-approved emission factor performance test. The new emission factors used for calculating emissions determined using this Protocol shall be effective upon receipt of the Notice of Compliance (NOC) letter that approves the test results and shall be incorporated into the permit during the next permit amendment. The Permittee shall follow this Protocol to independently determine the natural gas emission factors and the solid fuel emission factors. The new solid fuel emission factors determined using this Protocol shall also apply to the distillate oil emission factors. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]



5.35.35 PM < 2.5 micron: The Permittee must apply for and obtain a major permit amendment if the Permittee wishes to deviate from the Protocol for Re-setting the Emission Factor Used for Calculating PM2.5 Emissions established by this permit. [Minn. R. 7007.1500, subp. 1]

5.35.36 PM < 2.5 micron: Notwithstanding the Protocol detailed above, the MPCA reserves the right to set operational limits and requirements as allowed under Minn. R. 7017.2025. If the MPCA sets limits, the new limits shall be implemented upon receipt of the NOC letter that notifies the Permittee of preliminary approval. The limits set according to Minn. R. 7017.2025 are final upon issuance of a permit amendment incorporating the change. [Minn. R. 7017.2025]

5.35.37 Sulfur Dioxide: Calculations and Recordkeeping: The Permittee shall calculate and record the daily tons of SO2 emissions and the 30-day rolling sum of SO2 emissions from EQUI 45 (STRU 6 and STRU 53) each day. All SO2 emissions from EQUI 45 shall be included in the calculation of the rolling sum. Prior to certification of EQUI 143 and EQUI 144, emissions will be determined according to the calculation methods used in the permit application for Air Emission Permit No. 13700113-005. These methods are found in the BAE.xls (Excel) spreadsheet, tab (Table 3 SO2-SAM). After certification of EQUI 143 and EQUI 144, emissions from EQUI 45 (STRU 53) will be determined from EQUI 143 and EQUI 144. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.38 Nitrogen Oxides: Calculations and Recordkeeping: The Permittee shall calculate and record the daily tons of NOx emissions and the 180-day rolling sum of NOx emissions from EQUI 45 (STRU 6 and STRU 53) each day. All NOx emissions from EQUI 45 shall be included in the calculation of the rolling sum. Prior to certification of EQUI 142 and EQUI 144, emissions will be determined according to the calculation methods used in the permit application for Air Emission Permit No. 13700113-005. These methods are found in the PAE and PTE.xls (Excel) spreadsheet, tab (Table 2 PAE Calcs). After certification of EQUI 142 and EQUI 144, emissions from EQUI 45 (STRU 53) will be determined from EQUI 142 and EQUI 144. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.39 Sulfuric Acid Mist: Calculations and Recordkeeping: The Permittee shall calculate and record the daily tons of sulfuric acid mist emissions and the 30-day rolling sum of sulfuric acid mist emissions from EQUI 45 (STRU 6 and STRU 53) each day. All sulfuric acid mist emissions from EQUI 45 shall be included in these calculations. Prior to certification of EQUI 143 and EQUI 144, sulfuric acid mist emissions shall be determined according to the calculation methods used in the permit application for Air Emission Permit No. 13700113-005. These methods are found in the BAE.xls (Excel) spreadsheet, tab (Table 3 SO2-SAM). After certification of EQUI 143 and EQUI 144, emissions from EQUI 45 (STRU 53) will be determined from EQUI 143 and EQUI 144 as described in Appendix D. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.40 Recordkeeping: Maintain records of the occurrence and duration of any startup, shutdown, or malfunction of EQUI 45 including any malfunction of the air pollution control equipment; or any periods during which a continuous monitoring system or monitoring device is inoperative. [Minn. R. 7007.0800, subps. 4-5]

5.35.41 Alternative Fuel Testing Authorization: The Permittee is authorized to conduct test burns of alternative fuels in EQUI 45. Testing conducted under this authorization must be performed to generate emission factors to use when analyzing the addition of alternative fuels to the fuel stream. A major permit amendment is required following the testing to add an alternative fuel to the fuels allowed. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



5.35.42 The following list includes examples of alternative fuels: - clean or unadulterated wood (wood, sawdust, bark, material from facilities making dimensional lumber, etc. that has not been adulterated with resins, paints, stains, glues, coatings, or other chemicals) - wood waste from the Forestry Product Industry (unadulterated wood, wood chips, bark and sawdust from lumber mills and paper mills) - tree trimmings and brush - agricultural crop residues traditionally managed by leaving on fields (e.g. corn stover, corn cobs, straw) - forestry material traditionally managed by leaving in forest (logging residue) - energy crops grown specifically for use as a fuel, e.g. switchgrass, short rotation energy crops, poplar trees, etc. "Unadulterated" means "wood that does not contain contaminants present as a result of manufacturing or use of the wood". Examples of contaminants include paints, varnishes, stains, glues, resins or chemicals used to prevent rotting. Wood that is adulterated also includes such things as scraps and residue from composite wood products and vinyl covered window making. [Minn. R. 7007.0800, subp. 2]

5.35.43 Alternative Fuel Testing Restrictions: The Permittee must not undertake any physical or operational change that triggers the applicability of a New Source Performance Standard, a Maximum Achievable Control Technology standard, or the Prevention of Significant Deterioration regulation. [40 CFR pt. 60, 40 CFR pt. 63, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000, Title I Condition: Avoid major source under 40 CFR 52.21]

5.35.44 Alternative Fuel Testing Restrictions: Test burns shall be conducted in accordance with an MPCA-approved test plan and are limited to no more than 30 days of operation in a test period not to exceed 60 days of duration. [Minn. R. 7007.0800, subp. 2]

5.35.45 Alternative Fuel Testing Requirements: Any testing of an MPCA-authorized alternative fuel must be accommodated with existing equipment at the facility. Alternative fuels may be tested alone or as blends with authorized fuels. For each alternative fuel or blend with alternative fuel tested in a test burn, the Permittee shall conduct performance tests to measure emissions of PM, PM10, PM2.5, opacity, CO, NOx, SO2, HCl, acrolein, benzene, chlorine, formaldehyde, manganese, styrene, toluene, mercury, dioxin, PAHs, and other chemicals determined by the MPCA to be of potential interest. These tests shall be conducted for the purpose of developing emission factors. The method and duration for each test shall be determined in the test plan and/or the pre-test meeting with the approval of the MPCA. At the Permittee's request and with the MPCA's approval, pollutants on the list above may be eliminated. The Permittee shall collect a proximate and ultimate fuel analysis simultaneously with the test burn. These analyses shall be used to correlate fuel content and emissions. [Minn. R. 7007.0150, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.35.46 Alternative Fuel Testing Submittals: At least 30 days prior to testing an alternative fuel or blend, the Permittee shall submit a written performance test notification and test plan. The notification shall also document that there would be


Requirement number Requirement and citation sufficient quantity of fuel available to conduct performance testing, and that there is likely sufficient quantity of the fuel type so that it would be viable as a fuel. The test plan shall: 1. Meet the requirements of Minn. R. 7017.2030; 2. Describe the fuels or blends that are to be combusted; 3. Identify the type and estimated amount of fuel to be tested; 4. Describe operating parameters and anticipated fuel blends during the test; 5. Identify air pollutants (including other chemicals of potential interest as determined by the MPCA) and fuel parameters that will be measured during the testing; and 6. Provide a testing schedule. [Minn. R. 7017.2018, Minn. R. 7017.2030]

5.35.47 Manufactured Fuel Testing Requirements: For any manufactured fuel that the Permittee proposes to test, the Permittee shall first submit: 1. Identification of all materials and their proportions in the manufactured fuel; and 2. A proposed test plan. If the MPCA approves the manufactured fuel for testing, the Permittee shall comply with all conditions in "Alternative Fuel Testing Requirements" and the "Alternative Fuel Testing Submittals." Those conditions are found above. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


5.36.1 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. [Minn. R. 7011.0710, subps. 1(A)]



5.37.1 The Permittee shall vent emissions from EQUI 47 to control equipment meeting the requirements of TREA 89 and TREA 90 whenever EQUI 47 operates. [Minn. R. 7011.0075, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.2 Particulate Matter <= 317.6 tons per year 12-month rolling sum to be calculated by the 15th day of each month for the previous 12-month period as described later in this permit. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.37.3 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the unit is controlled by control equipment which has a collection efficiency of 85% by weight, this direct heating equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0610, subp. 1(A)(1), Minn. R. 7011.0710, subp. 3]

5.37.4 PM < 10 micron <= 382.2 tons per year 12-month rolling sum to be calculated by the 15th day of each month for the previous 12-month period as described later in this permit. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.37.5 PM < 2.5 micron <= 382.2 tons per year 12-month rolling sum to be calculated by the 15th day of each month for the previous 12-month period as described later in this permit. [Minn. R. 7007.0800, subp.


Requirement number Requirement and citation 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]


5.37.7 Sulfur Dioxide <= 197 tons 30-day rolling sum rolled daily. This condition restricts SO2 emissions from EQUI 47 to 2394 tons per year. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.8 Sulfur Dioxide <= 4 pounds per million Btu heat input when burning solid fossil fuels. If more than one fuel is burned simultaneously, calculate the emission limit as indicated in Minn. R. 7011.0605. [Minn. R. 7011.0610, subp. 2(B)]

5.37.9 Sulfur Dioxide <= 2 pounds per million Btu heat input when burning liquid fossil fuels. If more than one fuel is burned simultaneously, calculate the emission limit as indicated in Minn. R. 7011.0605. [Minn. R. 7011.0610, subp. 2(B)]

5.37.10 Nitrogen Oxides <= 1820 tons 180-day rolling sum rolled daily. This condition restricts NOx emissions from EQUI 47 to 3692 tons per year. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.11 Sulfuric Acid Mist <= 15.4 tons 30-day rolling sum rolled daily. This restricts sulfuric acid mist emissions from EQUI 47 to 186.8 tons per year. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.12 Fuel Usage: Except as noted in the Alternative Fuels Testing Authorization provisions, fuels are limited to pulverized coal, blends of coal and petroleum coke, natural gas and distillate oil. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.13 Fuel Usage: Natural gas only by design for the preheat burners. [Minn. R. 7005.0100, subp. 35a]

5.37.14 Opacity: Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(B)]


5.37.16 Prior to the installation and certification of a continuous emissions monitor system (CEMS) for SO2 for EQUI 47, the Permittee shall comply with the following conditions: Fuel Sulfur and BTU Content Monitoring: The Permittee shall analyze the weekly fuel composite samples for sulfur content in weight percent and heating value in BTU per pound, in accordance with current ASTM Methods. Sulfur Dioxide Emissions Calculation: Within 21 days after the end of a calendar week, the Permittee shall calculate the SO2 emissions rate in lbs/MMBtu from the results of the weekly fuel composite analysis, and the SO2 control efficiency of 25 percent or the value directly determined by recent performance testing - whichever is lower in value. The Permittee shall maintain a record of the analysis, calculations, and emission rate. [Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4(B)]

5.37.17 Beginning with the certification of a continuous emissions monitoring system (CEMS) for SO2 for EQUI 47, the Permittee shall comply with the following conditions: Fuel BTU Content Monitoring: The Permittee shall analyze the weekly fuel composite samples for heating value in BTU per pound, in accordance with current ASTM Methods.


Requirement number Requirement and citation Sulfur Dioxide Emissions Calculation (lb/MMBtu): Within 21 days after the end of a calendar week, the Permittee shall calculate and record the SO2 emissions rate in lbs/MMBtu for each 3-hour rolling period from the calendar week using the results of the weekly fuel composite analysis and stack CEMS measurements. The Permittee shall also calculate and record the emission limit for each 3-hour rolling period during the calendar week from the records of fuel inputs and fuel energy content. The Permittee shall maintain a record of the analysis, calculations, emission limit, and emission rate. [Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4(B)]


5.37.19 Air Flow Rate: Emissions Monitoring: The Permittee shall operate a continuous emission monitoring system (CEMS) to measure flue gas flow rate from EQUI 47. [Minn. R. 7017.1006, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.20 Daily Recordkeeping. On each day of operation, the Permittee shall calculate, record, and maintain a record of pellet production from EQUI 47. This shall be based on written logs and/or electronic monitors. [Minn. R. 7007.0800, subps. 4(D) & 5(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.37.21 Fuel Usage: The Permittee shall monitor and record the type and quantity of each fuel entering the furnace each hour in a form that enables the Permittee to convert the data to the heat input (BTU) of each fuel type (solid, liquid, or gas) on an hourly basis. [Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4(B), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.22 Fuel Usage: Daily Recordkeeping: On each day of operation, the Permittee shall calculate, record, and maintain a record of the total tons of solid fuel, cubic feet of natural gas, and gallons of distillate oil used. This shall be based on fuel usage meter readings, written logs, and/or electronic monitors. [Minn. R. 7007.0800, subps. 4(D)& 5(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.37.23 Fuel Sampling: The Permittee shall collect a solid fuel sample each weekday from the pulverized fuel pipe. The Permittee shall form a weekly composite of all samples collected in a given calendar week. [Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4(B)]

5.37.24 Particulate Matter: Monthly Recordkeeping. By the end of the month, the Permittee shall calculate and record the following: 1) The total pellet production for the previous calendar month using the daily production records; 2) The total heat input for all combined fuel types and the total heat input for each fuel type (solid, liquid, or gas) for the previous calendar month; 3) The Particulate Matter emissions for the previous month using the formulas specified in Appendix H of this permit. The Permittee shall use the emission factors included in Appendix H of the permit until receipt of a Notice of Compliance (NOC) letter that approves the most recent performance test result. At that time, the Permittee shall use the new emission factor as reset by the Protocol for Re-setting the Emission Factor Used for Calculation Particulate Matter Emissions in the formulas specified in Appendix H of this permit; and 4) The 12-month rolling sum Particulate Matter emissions for the previous 12-month period by summing the monthly Particulate Matter emissions data for the previous 12 months. [Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 5(A)]

5.37.25 PM < 10 micron: Monthly Recordkeeping. By the end of the month, the Permittee shall calculate and


Requirement number Requirement and citation record the following: 1) The total pellet production for the previous calendar month using the daily production records; 2) The total heat input for all combined fuel types and the total heat input for each fuel type (solid, liquid, or gas) for the previous calendar month; 3) The PM10 emissions for the previous month using the formulas specified in Appendix H of this permit. The Permittee shall use the emission factors included in Appendix H of the permit until receipt of a Notice of Compliance (NOC) letter that approves the most recent performance test result. At that time, the Permittee shall use the new emission factor as reset by the Protocol for Re-setting the Emission Factor Used for Calculation Particulate Matter Emissions in the formulas specified in Appendix H of this permit; and 4) The 12-month rolling sum PM10 emissions for the previous 12-month period by summing the monthly PM10 emissions data for the previous 12 months. [Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 5(A)]

5.37.26 PM < 2.5 micron: Monthly Recordkeeping. By the end of the month, the Permittee shall calculate and record the following: 1) The total pellet production for the previous calendar month using the daily production records; 2) The total heat input for all combined fuel types and the total heat input for each fuel type (solid, liquid, or gas) for the previous calendar month; 3) The PM2.5 emissions for the previous month using the formulas specified in Appendix H of this permit. The Permittee shall use the emission factors included in Appendix H of the permit until receipt of a Notice of Compliance (NOC) letter that approves the most recent performance test result. At that time, the Permittee shall use the new emission factor as reset by the Protocol for Re-setting the Emission Factor Used for Calculation Particulate Matter Emissions in the formulas specified in Appendix H of this permit; and 4) The 12-month rolling sum PM2.5 emissions for the previous 12-month period by summing the monthly PM2.5 emissions data for the previous 12 months. [Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 5(A)]

5.37.27 Particulate Matter: Protocol for Re-Setting the Emission Factor Used For Calculating Particulate Matter Emissions: The Permittee shall conduct performance testing under conditions that produce the maximum emission rate, using US EPA Reference Method 5 and 202 to measure the emission factors as required elsewhere in this permit. The Permittee shall report the test result in pounds per long ton of pellets produced in the performance test report required by Minn. R. 7017.2035, subp. 1. For each type of fuel combusted, the emission factor used for calculating emissions shall be re-set to the 3-hour average emission rate in pounds per long ton of pellets produced, measured during the most recent MPCA-approved emission factor performance test. The new emission factors used for calculating emissions determined using this Protocol shall be effective upon receipt of the Notice of Compliance (NOC) letter that approves the test results and shall be incorporated into the permit during the next permit amendment. The Permittee shall follow this Protocol to independently determine the natural gas emission factors and the solid fuel emission factors. The new solid fuel emission factors determined using this Protocol shall also apply to the distillate oil emission factors. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.37.28 Particulate Matter: The Permittee must apply for and obtain a major permit amendment if the Permittee wishes to deviate from the Protocol for Re-setting the Emission Factor Used for Calculating Particulate Matter Emissions established by this permit. [Minn. R. 7007.1500, subp. 1]

5.37.29 Particulate Matter: Notwithstanding the Protocol detailed above, the MPCA reserves the right to set operational limits and requirements as allowed under Minn. R. 7017.2025. If the MPCA sets limits, the


Requirement number Requirement and citation new limits shall be implemented upon receipt of the NOC letter that notifies the Permittee of preliminary approval. The limits set according to Minn. R. 7017.2025 are final upon issuance of a permit amendment incorporating the change. [Minn. R. 7017.2025]

5.37.30 PM < 10 micron: Protocol for Re-Setting the Emission Factor Used For Calculating PM10 Emissions: The Permittee shall conduct performance testing under conditions that produce the maximum emission rate, using US EPA Reference Method 201A and 202 to measure the emission factors as required elsewhere in this permit. The Permittee shall report the test result in pounds per long ton of pellets produced in the performance test report required by Minn. R. 7017.2035, subp. 1. For each type of fuel combusted, the emission factor used for calculating emissions shall be re-set to the 3-hour average emission rate in pounds per long ton of pellets produced, measured during the most recent MPCA-approved emission factor performance test. The new emission factors used for calculating emissions determined using this Protocol shall be effective upon receipt of the Notice of Compliance (NOC) letter that approves the test results and shall be incorporated into the permit during the next permit amendment. The Permittee shall follow this Protocol to independently determine the natural gas emission factors and the solid fuel emission factors. The new solid fuel emission factors determined using this Protocol shall also apply to the distillate oil emission factors. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.37.31 PM < 10 micron: The Permittee must apply for and obtain a major permit amendment if the Permittee wishes to deviate from the Protocol for Re-setting the Emission Factor Used for Calculating PM10 Emissions established by this permit. [Minn. R. 7007.1500, subp. 1]

5.37.32 PM < 10 micron: Notwithstanding the Protocol detailed above, the MPCA reserves the right to set operational limits and requirements as allowed under Minn. R. 7017.2025. If the MPCA sets limits, the new limits shall be implemented upon receipt of the NOC letter that notifies the Permittee of preliminary approval. The limits set according to Minn. R. 7017.2025 are final upon issuance of a permit amendment incorporating the change. [Minn. R. 7017.2025]

5.37.33 PM < 2.5 micron: Protocol for Re-Setting the Emission Factor Used For Calculating PM2.5 Emissions: The Permittee shall conduct performance testing under conditions that produce the maximum emission rate, using US EPA Reference Method 201A and 202 to measure the emission factors as required elsewhere in this permit. The Permittee shall report the test result in pounds per long ton of pellets produced in the performance test report required by Minn. R. 7017.2035, subp. 1. For each type of fuel combusted, the emission factor used for calculating emissions shall be re-set to the 3-hour average emission rate in pounds per long ton of pellets produced, measured during the most recent MPCA-approved emission factor performance test. The new emission factors used for calculating emissions determined using this Protocol shall be effective upon receipt of the Notice of Compliance (NOC) letter that approves the test results and shall be incorporated into the permit during the next permit amendment. The Permittee shall follow this Protocol to independently determine the natural gas emission factors and the solid fuel emission factors. The new solid fuel emission factors determined using this Protocol shall also apply to the distillate oil emission factors. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

5.37.34 PM < 2.5 micron: The Permittee must apply for and obtain a major permit amendment if the Permittee wishes to deviate from the Protocol for Re-setting the Emission Factor Used for Calculating PM2.5 Emissions established by this permit. [Minn. R. 7007.1500, subp. 1]

5.37.35 PM < 2.5 micron: Notwithstanding the Protocol detailed above, the MPCA reserves the right to set operational limits and requirements as allowed under Minn. R. 7017.2025. If the MPCA sets limits, the new limits shall be implemented upon receipt of the NOC letter that notifies the Permittee of preliminary approval. The limits set according to Minn. R. 7017.2025 are final upon issuance of a


Requirement number Requirement and citation permit amendment incorporating the change. [Minn. R. 7017.2025]

5.37.36 Sulfur Dioxide: Calculations and Recordkeeping: The Permittee shall calculate and record the daily tons of SO2 emissions and the 30-day rolling sum of SO2 emissions from EQUI 47 (STRU 7, STRU 15, and STRU 16) each day. All SO2 emissions from EQUI 47 shall be included in the calculation of the rolling sum. Prior to certification of EQUI 146, EQUI 147, EQUI 149, and EQUI 150, emissions will be determined according to the calculation methods used in the permit application for Air Emission Permit No. 13700113-005. These methods are found in the BAE.xls (Excel) spreadsheet, tab (Table 3 SO2-SAM). After certification of EQUI 146, EQUI 147, EQUI 149, and EQUI 150, emissions from EQUI 47 (STRU 15 and STRU 16) will be determined from EQUI 146, EQUI 147, EQUI 149, and EQUI 150. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.37 Nitrogen Oxides: Calculations and Recordkeeping: The Permittee shall calculate and record the daily tons of NOx emissions and the 180-day rolling sum of NOx emissions from EQUI 47 (STRU 7, STRU 15, and STRU 16) each day. All NOx emissions from EQUI 47 shall be included in the calculation of the rolling sum. Prior to certification of EQUI 145, EQUI 147, EQUI 148, and EQUI 150, emissions will be determined according to the calculation methods used in the permit application for Air Emission Permit No. 13700113-005. These methods are found in the PAE and PTE.xls (Excel) spreadsheet, tab (Table 2 PAE Calcs). After certification of EQUI 145, EQUI 147, EQUI 148, and EQUI 150, emissions from EQUI 47 (STRU 15 and STRU 16) will be determined from EQUI 145, EQUI 147, EQUI 148, and EQUI 150. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.38 Sulfuric Acid Mist: Calculations and Recordkeeping: The Permittee shall calculate and record the daily tons of sulfuric acid mist emissions and the 30-day rolling sum of sulfuric acid mist emissions from EQUI 47 (STRU 7, STRU 15, and STRU 16) each day. All sulfuric acid mist emissions from EQUI 47 shall be included in these calculations. Prior to certification of EQUI 146, EQUI 147, EQUI 149, and EQUI 150, sulfuric acid mist emissions shall be determined according to the calculation methods used in the permit application for Air Emission Permit No. 13700113-005. These methods are found in the BAE.xls (Excel) spreadsheet, tab (Table 3 SO2-SAM). After certification of EQUI 146, EQUI 147, EQUI 149, and EQUI 150, emissions from EQUI 47 (STRU 15 and STRU 16) will be determined from EQUI 146, EQUI 147, EQUI 149, and EQUI 150 as described in Appendix D. [Minn. R. 7007.0800, subps. 4-5, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.39 Recordkeeping: Maintain records of the occurrence and duration of any startup, shutdown, or malfunction of EQUI 47 including any malfunction of the air pollution control equipment; or any periods during which a continuous monitoring system or monitoring device is inoperative. [Minn. R. 7007.0800, subps. 4-5]

5.37.40 Alternative Fuel Testing Authorization: The Permittee is authorized to conduct test burns of alternative fuels in EQUI 47. Testing conducted under this authorization must be performed to generate emission factors to use when analyzing the addition of alternative fuels to the fuel stream. A major permit amendment is required following the testing to add an alternative fuel to the fuels allowed. [Minn. R. 7007.0800, subp. 2]

5.37.41 The following list includes examples of alternative fuels: - clean or unadulterated wood (wood, sawdust, bark, material from facilities making dimensional lumber, etc. that has not been adulterated with resins, paints, stains, glues, coatings, or other


Requirement number Requirement and citation chemicals) - wood waste from the Forestry Product Industry (unadulterated wood, wood chips, bark and sawdust from lumber mills and paper mills) - tree trimmings and brush - agricultural crop residues traditionally managed by leaving on fields (e.g. corn stover, corn cobs, straw) - forestry material traditionally managed by leaving in forest (logging residue) - energy crops grown specifically for use as a fuel, e.g. switchgrass, short rotation energy crops, poplar trees, etc. "Unadulterated" means "wood that does not contain contaminants present as a result of manufacturing or use of the wood". Examples of contaminants include paints, varnishes, stains, glues, resins or chemicals used to prevent rotting. Wood that is adulterated also includes such things as scraps and residue from composite wood products and vinyl covered window making. [Minn. R. 7007.0800, subp. 2]

5.37.42 Alternative Fuel Testing Restrictions: The Permittee must not undertake any physical or operational change that triggers the applicability of a New Source Performance Standard, a Maximum Achievable Control Technology standard, or the Prevention of Significant Deterioration regulation. [40 CFR pt. 60, 40 CFR pt. 63, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.37.43 Alternative Fuel Testing Restrictions: Test burns shall be conducted in accordance with an MPCA-approved test plan and are limited to no more than 30 days of operation in a test period not to exceed 60 days of duration. [Minn. R. 7007.0800, subp. 2]

5.37.44 Alternative Fuel Testing Requirements: Any testing of an MPCA-authorized alternative fuel must be accommodated with existing equipment at the facility. Alternative fuels may be tested alone or as blends with authorized fuels. For each alternative fuel or blend with alternative fuel tested in a test burn, the Permittee shall conduct performance tests to measure emissions of PM, PM10, PM2.5, opacity, CO, NOx, SO2, HCl, acrolein, benzene, chlorine, formaldehyde, manganese, styrene, toluene, mercury, dioxin, PAHs, and other chemicals determined by the MPCA to be of potential interest. These tests shall be conducted for the purpose of developing emission factors. The method and duration for each test shall be determined in the test plan and/or the pre-test meeting with the approval of the MPCA. At the Permittee's request and with the MPCA's approval, pollutants on the list above may be eliminated. The Permittee shall collect a proximate and ultimate fuel analysis simultaneously with the test burn. These analyses shall be used to correlate fuel content and emissions. [Minn. R. 7007.0150, Minn. R. 7007.0800, subp. 2]

5.37.45 Alternative Fuel Testing Submittals: At least 30 days prior to testing an alternative fuel or blend, the Permittee shall submit a written performance test notification and test plan. The notification shall also document that there would be sufficient quantity of fuel available to conduct performance testing, and that there is likely sufficient quantity of the fuel type so that it would be viable as a fuel. The test plan shall: 1. Meet the requirements of Minn. R. 7017.2030; 2. Describe the fuels or blends that are to be combusted;


Requirement number Requirement and citation 3. Identify the type and estimated amount of fuel to be tested; 4. Describe operating parameters and anticipated fuel blends during the test; 5. Identify air pollutants (including other chemicals of potential interest as determined by the MPCA) and fuel parameters that will be measured during the testing; and 6. Provide a testing schedule. [Minn. R. 7017.2018, Minn. R. 7017.2030]

5.37.46 Manufactured Fuel Testing Requirements: For any manufactured fuel that the Permittee proposes to test, the Permittee shall first submit: 1. Identification of all materials and their proportions in the manufactured fuel; and 2. A proposed test plan. If the MPCA approves the manufactured fuel for testing, the Permittee shall comply with all conditions in "Alternative Fuel Testing Requirements" and the "Alternative Fuel Testing Submittals." Those conditions are found above. [Minn. R. 7007.0800, subp. 2]

5.37.47 The Permittee shall submit an annual report by the 31st of January. The report shall document the PM, PM10, and PM2.5 12-month rolling sum calculations for the previous calendar year. The report shall be submitted with the annual Compliance Certification required by this permit. As part of the Annual Report, the Permittee shall verify and certify that the facility has maintained net emissions increases below the New Source Review significant emission rates. [Minn. R. 7007.0800, subp. 16(L)]

EQUI 49 Fairlane Truck Shop Boiler

5.38.1 Total Particulate Matter <= 0.6 pounds per million Btu heat input. [Minn. R. 7011.0510, subp. 1]

5.38.2 Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R. 7011.0510, subp. 2]

5.38.3 Sulfur Dioxide <= 2.0 pounds per million Btu heat input. The Permittee shall calculate sulfur dioxide emissions based on records of vendor certification of fuel sulfur content, as an indicator of compliance with Minn. R. 7011.0510, subp. 1. [Minn. R. 7011.0510, subp. 1]

5.38.4 Fuel Type: Limited to natural gas and distillate fuel oil only. [Minn. R. 7007.0800, subp. 2]

EQUI 50 Fairlane New Shop Boiler





EQUI 51 Fuel Handling Boiler #1





EQUI 52 Fuel Handling Boiler #2







EQUI 53 "A" Binder Day Bin






EQUI 55 "B" Binder Day Bin




EQUI 117 Crude Ore Unloading Pan Feeders

5.44.1 The Permittee shall vent emissions from EQUI 117 to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 85. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.44.2 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. Because it has been shown that the facility does not cause a violation of ambient air quality


Requirement number Requirement and citation standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the unit is controlled by control equipment which has a collection efficiency of 85% by weight, this industrial process equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0710, subps. 1(A)and 3]


5.44.4 Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 14]


EQUI 118 Coarse Ore Surge

5.45.1 The Permittee shall vent emissions from EQUI 118 to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 83. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



5.45.4 Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]


EQUI 119 Third Stage Bins Conveyor

5.46.1 The Permittee shall vent emissions from the third stage bins conveyor, EQUI 119, to a wet scrubber meeting the permit requirements for COMG 3, COMG 4, COMG 8, COMG 16, and TREA 87 until the initial startup of the fabric filter, TREA 27, at which point the Permittee shall vent emissions from the third stage bins conveyor, EQUI 119, to a fabric filter meeting the permit requirements for COMG 3, COMG 19, and TREA 27. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]





EQUI 120 Fourth Stage Trip/Bin/Convey

5.47.1 The Permittee shall vent emissions from the fourth stage trip/bin/conveyor, EQUI 120, to a wet scrubber meeting the permit requirements for COMG 3, COMG 4, COMG 8, COMG 16, and TREA 69 until the initial startup of the fabric filter, TREA 28, at which point the Permittee shall vent emissions from the fourth stage trip/bin/conveyor, EQUI 120, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 28. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



EQUI 121 #1 Rod Mill Feed

5.48.1 The Permittee shall vent emissions from the rod mill feed, EQUI 121, to a wet scrubber meeting the permit requirements for COMG 3, COMG 4, COMG 8, COMG 16, and TREA 68 until the initial startup of the fabric filter, TREA 30, at which point the Permittee shall vent emissions from the rod mill feed, EQUI 121, to a fabric filter meeting the permit requirements for COMG 3, COMG 17, and TREA 30. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]





5.49.2 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735.


Requirement number Requirement and citation Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the unit is controlled by control equipment which has a collection efficiency of 85% by weight, this industrial process equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0710, subps. 1(A)and 3]











5.52.1 The Permittee shall vent emissions from the rod mill feed, EQUI 125, to a wet scrubber meeting the permit requirements for COMG 3, COMG 4, COMG 8, COMG 16, and TREA 37 until the initial startup of the fabric filter, TREA 34, at which point the Permittee shall vent emissions from the rod mill feed,


Requirement number Requirement and citation EQUI 125, to a fabric filter meeting the permit requirements for COMG 3, COMG 19, and TREA 34. [Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



EQUI 126 Line 2 Binder Addition




5.53.4 Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 14]

5.53.5 Gas Stream Pressure Drop: Monitor and record once per week when in operation once the pressure gauges are installed. [Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 4(D)]

EQUI 127 Line 2 Grate Feed


5.54.2 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the industrial process equipment is controlled by control equipment which has a collection efficiency of 85% by weight, this


Requirement number Requirement and citation industrial process equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0715, subps. 1(A)and 3]


5.54.4 Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J)]

EQUI 128 Line 2 Grate Discharge





EQUI 129 Line 2 Kiln Cooler Discharge

5.56.1 The Permittee shall vent emissions from EQUI 129 to TREA 43, TREA 55, and TREA 78 whenever EQUI 129 operates, and operate and maintain TREA 43, TREA 55, and TREA 78 at all times that any emissions are vented to TREA 43, TREA 55, and TREA 78. The Permittee shall document periods of non-operation of the control equipment. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]



5.56.4 Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 4(D), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J)]

EQUI 130 Line 1 Grate Feed


5.57.2 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to


Requirement number Requirement and citation further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. Because it has been shown that the facility does not cause a violation of ambient air quality standards, and is located outside the Mpls/St. Paul air quality control region and the city of Duluth, and is located at least 1/4 mile from any residence or public roadway, and the unit is controlled by control equipment which has a collection efficiency of 85% by weight, this industrial process equipment is considered to be in compliance with this requirement. [Minn. R. 7011.0710, subps. 1(A)and 3]


5.57.4 Process Monitoring: Check stack visible emissions (opacity) once daily using a checklist in Appendix B. [Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 4(D)]

EQUI 131 Line 1 Grate Discharge





EQUI 132 Line 1 Kiln Cooler Discharge

5.59.1 The Permittee shall vent emissions from EQUI 132 to TREA 58 and TREA 61 whenever EQUI 132 operates, and operate and maintain TREA 58 and TREA 61 at all times that any emissions are vented to TREA 58 and TREA 61. The Permittee shall document periods of non-operation of the control equipment. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]


5.59.3 Opacity <= 20 percent opacity except for one six-minute per hour of not more than 60 percent


Requirement number Requirement and citation opacity. [Minn. R. 7011.0710, subp. 1(B)]


EQUI 133 Binder Addition to Concentrate Conveyor






EQUI 142 Furnace 1 NOx CEMS

5.61.1 CEMS Certification/Recertification Test: due 90 days after the first excess emissions report required for the CEMS or any change which invalidates the monitor's certification status as outlined in Minn. R. 7017.1050, subp. 2. [Minn. R. 7017.1050, subp. 1]


5.61.3 Certification Test Plan due 30 days before Certification Test. Certification Test Pretest Meeting due 7 days before Certification Test. Certification Test Report - Microfiche Copy due 105 days after Certification Test. Certification Test Report due 45 days after Certification Test. The Notification, Test Plan, and Test Report may be submitted in alternate format as allowed by Minn. R. 7017.1120, subp. 2. [Minn. R. 7017.1060, subp. 1-3, Minn. R. 7017.1080, subp. 1-4]

5.61.4 Continuous Operation: CEMS must be operated and data recorded during all periods of emission unit operation including periods of emission unit start-up, shutdown, or malfunction except for periods of acceptable monitor downtime. This requirement applies whether or not a numerical emission limit applies during these periods. A CEMS must not be bypassed except in emergencies where failure to bypass would endanger human health, safety, or plant equipment. [Minn. R. 7017.1090]

5.61.5 Monitoring Data: All data points collected by a CEMS shall be used to calculate individual hourly emission averages unless another applicable requirement requires more frequent averaging. In order for an hour of data to be considered, it must contain the following minimum number of data points: A. four data points, equally spaced, if the emission unit operated during the entire hour; B. two data points, at least 15 minutes apart, during periods of monitor calibration or routine maintenance; C. one data point if the emission unit operated for 15 minutes or less during the hour. [Minn. R.


Requirement number Requirement and citation 7017.1160, subp. 1-2]

5.61.6 QA Plan: Develop and implement a written quality assurance plan that covers each CEMS. The plan shall be on site and available for inspection within 30 days after monitor certification. The plan shall contain all of the information required by 40 CFR pt. 60, Appendix F, Section 3. The plan shall include the manufacturer's spare parts list for each CEMS and require that those parts be kept at the facility unless the Commissioner gives written approval to exclude specific spare parts from the list. [Minn. R. 7017.1170, subp. 2]

5.61.7 Requirement: CEMS Daily Calibration Drift (CD) Test: The CD shall be quantified and recorded at zero (low-level) and upscale (high-level) gas concentrations at least once daily according to the procedures listed in Minn. R. 7017.1170, subp. 3(A) and (B) and 40 CFR Section 60.13(d)(1) for each pollutant concentration, each diluent monitor, and for each monitor range. The CEMS shall be adjusted whenever the CD exceeds twice the specification of 40 CFR pt. 60, Appendix B. If no span value is specified in the applicable requirement or in a compliance document, the Permittee shall use a span value equivalent to 1.5 times the emission limit. 40 CFR pt. 60, Appendix F, shall be used to determine out-of-control periods for CEMS. Follow the procedures in 40 CFR pt. 60, Appendix F. [Minn. R. 7017.1170, subp. 3]

5.61.8 Relative Accuracy Test Audit (RATA) Notification: due 30 days before CEMS Relative Accuracy Test Audit (RATA). [Minn. R. 7017.1180, subp. 2]

5.61.9 Cylinder Gas Audit (CGA) Results Summary: due 30 days after end of each calendar quarter in which a CGA was conducted. [Minn. R. 7017.1180, subp. 1]

5.61.10 Relative Accuracy Test Audit (RATA) Results Summary: due 30 days after end of each calendar quarter in which a RATA was conducted. [Minn. R. 7017.1180, subp. 3]

5.61.11 Recordkeeping: The owner or operator must retain records of all CEMS monitoring data and support information for a period of five years from the date of the monitoring sample, measurement or report. Records shall be kept at the source. [Minn. R. 7017.1130]

EQUI 143 Furnace 1 SO2 CEMS





5.62.5 Monitoring Data: All data points collected by a CEMS shall be used to calculate individual hourly emission averages unless another applicable requirement requires more frequent averaging. In order for an hour of data to be considered, it must contain the following minimum number of data points: A. four data points, equally spaced, if the emission unit operated during the entire hour; B. two data points, at least 15 minutes apart, during periods of monitor calibration or routine


Requirement number Requirement and citation maintenance; C. one data point if the emission unit operated for 15 minutes or less during the hour. [Minn. R. 7017.1160, subp. 1-2]







EQUI 144 Furnace 1 Stack Air Flow

5.63.1 Air Flow Rate: Emissions Monitoring: The Permittee shall operate a continuous emission monitoring system (CEMS) to measure emissions from EQUI 45. [Minn. R. 7017.1006, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]




5.63.5 Monitoring Data: All data points collected by a CEMS shall be used to calculate individual hourly emission averages unless another applicable requirement requires more frequent averaging. In order for an hour of data to be considered, it must contain the following minimum number of data points:


Requirement number Requirement and citation A. four data points, equally spaced, if the emission unit operated during the entire hour; B. two data points, at least 15 minutes apart, during periods of monitor calibration or routine maintenance; C. one data point if the emission unit operated for 15 minutes or less during the hour. [Minn. R. 7017.1160, subp. 1-2]



EQUI 145 Furnace 2A NOx CEMS





5.64.5 Monitoring Data: All data points collected by a CEMS shall be used to calculate individual hourly emission averages unless another applicable requirement requires more frequent averaging. In order for an hour of data to be considered, it must contain the following minimum number of data points: A. four data points, equally spaced, if the emission unit operated during the entire hour; B. two data points, at least 15 minutes apart, during periods of monitor calibration or routine maintenance; C. one data point if the emission unit operated for 15 minutes or less during the hour. [Minn. R. 7017.1160, subp. 1-2]


5.64.7 Requirement: CEMS Daily Calibration Drift (CD) Test: The CD shall be quantified and recorded at zero (low-level) and upscale (high-level) gas concentrations at least once daily according to the procedures listed in Minn. R. 7017.1170, subp. 3(A) and (B) and 40 CFR Section 60.13(d)(1) for each pollutant


Requirement number Requirement and citation concentration, each diluent monitor, and for each monitor range. The CEMS shall be adjusted whenever the CD exceeds twice the specification of 40 CFR pt. 60, Appendix B. If no span value is specified in the applicable requirement or in a compliance document, the Permittee shall use a span value equivalent to 1.5 times the emission limit. 40 CFR pt. 60, Appendix F, shall be used to determine out-of-control periods for CEMS. Follow the procedures in 40 CFR pt. 60, Appendix F. [Minn. R. 7017.1170, subp. 3]





EQUI 146 Furnace 2A SO2 CEMS







5.65.7 Requirement: CEMS Daily Calibration Drift (CD) Test: The CD shall be quantified and recorded at zero


Requirement number Requirement and citation (low-level) and upscale (high-level) gas concentrations at least once daily according to the procedures listed in Minn. R. 7017.1170, subp. 3(A) and (B) and 40 CFR Section 60.13(d)(1) for each pollutant concentration, each diluent monitor, and for each monitor range. The CEMS shall be adjusted whenever the CD exceeds twice the specification of 40 CFR pt. 60, Appendix B. If no span value is specified in the applicable requirement or in a compliance document, the Permittee shall use a span value equivalent to 1.5 times the emission limit. 40 CFR pt. 60, Appendix F, shall be used to determine out-of-control periods for CEMS. Follow the procedures in 40 CFR pt. 60, Appendix F. [Minn. R. 7017.1170, subp. 3]





EQUI 147 Furnace 2A Stack Air Flow






5.66.6 QA Plan: Develop and implement a written quality assurance plan that covers each CEMS. The plan shall be on site and available for inspection within 30 days after monitor certification. The plan shall contain all of the information required by 40 CFR pt. 60, Appendix F, Section 3. The plan shall include the manufacturer's spare parts list for each CEMS and require that those parts be kept at the facility unless the Commissioner gives written approval to exclude specific spare parts from the list. [Minn. R.


Requirement number Requirement and citation 7017.1170, subp. 2]


EQUI 148 Furnace 2B NOx CEMS









5.67.9 Cylinder Gas Audit (CGA) Results Summary: due 30 days after end of each calendar quarter in which a


Requirement number Requirement and citation CGA was conducted. [Minn. R. 7017.1180, subp. 1]



EQUI 149 Furnace 2B SO2 CEMS








5.68.8 Relative Accuracy Test Audit (RATA) Notification: due 30 days before CEMS Relative Accuracy Test


Requirement number Requirement and citation Audit (RATA). [Minn. R. 7017.1180, subp. 2]




EQUI 150 Furnace 2B Stack Air Flow








EQUI 152 Make-Up Heater 1 (Fine Crusher)

5.70.1 Total Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. [Minn. R. 7011.0610, subp. 1(A)(1)]

5.70.2 Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent


Requirement number Requirement and citation opacity. [Minn. R. 7011.0610, subp. 1(A)(2)]

5.70.3 Fuel Usage: Natural gas only by design. [Minn. R. 7005.0100, subp. 35a]













EQUI 158 Make-Up Heater (Fine Ore Surge - Conveyor 3)














EQUI 169 Line 1 Kiln Drive Emergency Engine

5.77.1 EQUI 169 is a new affected source as defined under 40 CFR pt. 63, subp. ZZZZ, and the facility is a major source as defined at 40 CFR Section 63.2, and EQUI 169 is an emergency stationary RICE with a site rating of less than 500 brake HP. The Permittee shall meet the requirements of 40 CFR pt. 63, subp. ZZZZ by meeting the requirements of 40 CFR pt. 60, subp. IIII. No further requirements of 40 CFR pt. 63, subp. ZZZZ apply to EQUI 169. EQUI 169 must meet the definition of an emergency stationary RICE in 40 CFR Section 63.6675, which includes operating according to the provisions specified in 40 CFR Section 63.6640(f). [40 CFR 63.6590(c), Minn. R. 7011.8150]

5.77.2 The provisions of 40 CFR pt. 60, subp. IIII applies to stationary compression ignition combustion engines that commence construction, modification, or reconstruction after July 11, 2005 as specified in 40 CFR Section 60.4200(a)(1) through (4). For the purposes of 40 CFR pt. 60, subp. IIII, the date that construction commences is the date the engine is ordered by the owner or operator. [40 CFR 60.4200(a), Minn. R. 7011.2305]

5.77.3 Total Particulate Matter <= 0.30 grams per kilowatt-hour. [40 CFR 60.4202(a)(2), 40 CFR 60.4205(b), 40 CFR 63.6590(c), 40 CFR 89.112(a), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.4 Opacity: Exhaust opacity from compression ignition nonroad engines must not exceed: 1. 20 percent during the acceleration mode; 2. 15 percent during the lugging mode; and 3. 50 percent during the peaks in either the acceleration or lugging modes. [40 CFR 60.4202(a)(2), 40 CFR 60.4205(b), 40 CFR 63.6590(c), 40 CFR 89.113(a), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.5 Opacity <= 20 percent opacity once operating temperatures have been attained. [Minn. R. 7011.2300, subp. 1]

5.77.6 Sulfur Dioxide <= 0.50 pounds per million Btu heat input. The potential to emit from the unit is 0.29 lb/MMBtu due to equipment design and allowable fuels. [Minn. R. 7011.2300, subp. 2]

5.77.7 Carbon Monoxide <= 5.0 grams per kilowatt-hour. [40 CFR 60.4202(a)(2), 40 CFR 60.4205(b), 40 CFR 63.6590(c), 40 CFR 89.112(a), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.8 NMHC+NOx <= 4.0 grams per kilowatt-hour. [40 CFR 60.4202(a)(2), 40 CFR 60.4205(b), 40 CFR 63.6590(c), 40 CFR 89.112(a), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.9 The Permittee must operate and maintain the stationary compression ignition internal combustion engine such that it achieves the emission standards as required in 40 CFR Sections 60.4204 and 60.4205 over the entire life of the engine. [40 CFR 60.4206, 40 CFR 63.6590(c), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.10 Fuel Usage: Diesel fuel only by design. Diesel fuel must meet the requirements of 40 CFR Section 80.510(b). All NRLM diesel fuel is subject to the following per-gallon standards: 1. Sulfur content: 15 part per million (ppm) maximum; and 2. Cetane index or aromatic content: a minimum cetane index of 40, or a maximum aromatic content of 35 volume percent. [40 CFR 60.4207(b), 40 CFR 63.6590(c), 40 CFR 80.510(b), Minn. R. 7005.0100, subp. 35a, Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.11 The Permittee must do the following, except as permitted under 40 CFR Section 60.4211(g): 1. Operate and maintain the compression ignition internal combustion engine and control device according to the manufacturer's emission-related written instruction; 2. Change only those emission-related settings that are permitted by the manufacturer; and 3. Meet the requirements of 40 CFR pts. 89, 94, and/or 1068, as applicable. [40 CFR 60.4211(a), 40 CFR 63.6590(c), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.12 The Permittee must comply with the emission standards specified in 40 CFR Sections 60.4204(b) or 60.4205(b) by purchasing an engine certified to the emission standards in 40 CFR Sections 60.4204(b),


Requirement number Requirement and citation 60.4205(b), or 60.4205(c) as applicable, for the same model year and maximum engine power. The engine must be installed and configured according to the manufacturer's emission-related specifications, except as permitted in 40 CFR Section 60.4211(g). [40 CFR 60.4211(c), 40 CFR 63.6590(c), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.13 The Permittee must operate the emergency stationary RICE according to the requirements in 40 CFR Section 60.4211(f)(1) through (f)(3) and 40 CFR Section 63.6640(f)(1) through (4). In order for the engine to be considered an emergency stationary RICE under 40 CFR pt. 60, subp. IIII and 40 CFR pt. 63, subp. ZZZZ, any operation other than emergency operation, maintenance and testing, emergency demand response, and operation in non-emergency situations for 50 hours per year, as described in 40 CFR Section 60.4211(f)(1) through (3) and 40 CFR Section 63.6640(f)(1) through (4), is prohibited. If the Permittee does not operate the engine according to the requirements in 40 CFR Section 60.4211(f)(1) through (3), the engine will not be considered an emergency engine under 40 CFR pt. 60, subp. IIII and must meet all requirements for non-emergency engines. If the Permittee does not operate the engine according to the requirements in 40 CFR Section 63.6640(f)(1) through (4), the engine will not be considered an emergency engine under 40 CFR pt. 63, subp. ZZZZ and must meet all requirements for non-emergency engines. [40 CFR 60.4211(f), 40 CFR 63.6590(c), 40 CFR 63.6640(f), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.14 There is no time limit on the use of emergency stationary RICE in emergency situations. [40 CFR 60.4211(f)(1), 40 CFR 63.6590(c), 40 CFR 63.6640(f)(1), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.15 The Permittee may operate the emergency stationary RICE for any combination of the purposes specified in 40 CFR Section 60.4211(f)(2)(i) through (iii) and 40 CFR Section 63.6640(f)(2)(i) through (iii) for a maximum of 100 hours per calendar year. Any operation for non-emergency situations as allowed by 40 CFR Section 60.4211(f)(3) and 40 CFR Section 63.6640(f)(3) counts as part of the 100 hours per calendar year allowed by 40 CFR Section 60.4211(f)(2) and 40 CFR Section 63.6640(f)(2). [40 CFR 60.4211(f)(2), 40 CFR 63.6590(c), 40 CFR 63.6640(f)(2), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.16 Emergency stationary RICE may be operated for the purpose of maintenance checks and readiness testing, provided that the tests are recommended by Federal, State or local government, the manufacturer, the vendor, the regional transmission organization or equivalent balancing authority and transmission operator, or the insurance company associated with the engine. The Permittee may petition the Administrator for approval of additional hours to be used for maintenance checks and readiness testing, but a petition is not required if the Permittee maintains records indication that Federal, State, or local standards require maintenance and testing of emergency RICE beyond 100 hours per year. [40 CFR 60.4211(f)(2)(i), 40 CFR 63.6590(c), 40 CFR 63.6640(f)(2)(i), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.17 Emergency stationary RICE may be operated for up to 50 hours per calendar year in non-emergency situations. The 50 hours of operation in non-emergency situations are counted as part of the 100 hours per calendar year for maintenance and testing and emergency demand response provided in 40 CFR Section 60.4211(f)(2) and 40 CFR Section 63.6640(f)(2). The 50 hours per year for non-emergency situations cannot be used for peak shaving or non-emergency demand response, or to generate income for a facility to supply power to an electric grid or otherwise supply power as part of financial arrangement with another entity. [40 CFR 60.4211(f)(3), 40 CFR 63.6590(c), 40 CFR 63.6640(f)(3), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.18 If the Permittee does not install, configure, operate, and maintain the engine and control device according to the manufacturer's emission-related written instructions, or the Permittee changes emission-related settings in a way that is not permitted by the manufacturer, the Permittee must demonstrate compliance as follows: The Permittee must keep a maintenance plan and records of conducted maintenance and must, to


Requirement number Requirement and citation the extent practicable, maintain and operate the engine in a manner consistent with good air pollution control practice for minimizing emissions. In addition, the Permittee must conduct an initial performance test to demonstrate compliance with the applicable emission standards within 1 year of startup, or within 1 year after an engine and control device is no longer installed, configured, operated, and maintained in accordance with the manufacturer's emission-related written instructions, or within 1 year after the Permittee changes emission-related settings in a way that is not permitted by the manufacturer. [40 CFR 60.4211(g), 40 CFR 63.6590(c), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.19 The Permittee must install a non-resettable hour meter prior to startup of the engine. A non-resettable hour meter has already been installed. [40 CFR 60.4209(a), 40 CFR 63.6590(c), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.20 Operating Hours: The Permittee must keep records of the operation of the engine in emergency and non-emergency service that are recorded through the non-resettable hour meter. The Permittee must record the time of operation of the engine and the reason the engine was in operation during that time. [40 CFR 60.4214(b), 40 CFR 63.6590(c), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.21 Operating Hours: The Permittee shall maintain documentation on site that the unit is an emergency generator by design that qualifies under the U.S. EPA memorandum entitled "Calculating Potential to Emit (PTE) for Emergency Generators" dated September 6, 1995, limiting operation to 500 hours per year. [Minn. R. 7007.0800, subps. 4-5]

5.77.22 The Permittee shall keep records of fuel type and usage on a monthly basis. [Minn. R. 7007.0800, subp. 5]

5.77.23 Fuel Supplier Certification: The Permittee shall obtain and maintain a fuel supplier certification for each shipment of diesel fuel oil, certifying that the sulfur content does not exceed 15 ppm maximum per gallon. [Minn. R. 7007.0800, subps. 4-5]

5.77.24 The Permittee must keep records of any corrective action taken after the backpressure monitor has notified the Permittee that the high backpressure limit of the engine is approached. [40 CFR 60.4214(c), 40 CFR 63.6590(c), Minn. R. 7011.2305, Minn. R. 7011.8150]

5.77.25 The Permittee must comply with the applicable general provisions of 40 CFR Sections 60.1 through 60.19 shown in Table 8 of 40 CFR pt. 60, subp. IIII. [40 CFR 60.4218(Table 8), 40 CFR 63.6590(c), Minn. R. 7011.2305, Minn. R. 7011.8150]


EQUI 170 Binder Unloading (Truck to Bin)






EQUI 171 Bentonite Unloading (Truck to Bin)




EQUI 172 Bentonite Conveying (Bin to #5 Conveyor)




EQUI 173 Fluxstone Railcar Summer Unloading (Bottom Dump to CV-001A)


5.81.2 Total Particulate Matter <= 0.032 grams per dry standard cubic meter (0.014 grains per dry standard cubic foot). [40 CFR 60.672(a), 40 CFR pt. 60, subp. OOO(Table 2), Minn. R. 7011.3350]

5.81.3 In conducting the performance tests required in 40 CFR Section 60.8, the Permittee shall use as a reference methods and procedures the test methods specified in 40 CFR pt. 60, Appendices A-1 through A-7 or other methods and procedures as specified in 40 CFR Section 60.675, except as provided in 40 CFR Section 60.8(b). The Permittee shall determine compliance with the particulate matter standards in 40 CFR Section 60.672(a) as follows: - Method 5 of 40 CFR pt. 60, Appendix A-3 or Method 17 of 40 CFR pt. 60, Appendix A-6 shall be used to determine the particulate matter concentration. The sample volume shall be at least 1.70 dscm (60 dscf). For Method 5 (40 CFR pt. 60, Appendix A-3), if the gas stream being sampled is at ambient temperature, the sampling probe and filter may be operated without heaters. If the gas stream is


Requirement number Requirement and citation above ambient temperature, the sampling probe and filter may be operated at a temperature high enough, but no higher than 121 degrees C (250 degrees F), to prevent water condensation on the filter. - Method 9 of 40 CFR pt. 60, Appendix A-4 and the procedures in 40 CFR Section 60.11 shall be used to determine opacity. [40 CFR 60.675(a), 40 CFR 60.675(b), Minn. R. 7011.3350]






EQUI 174 Fluxstone Summer Conveying (CV-001A to CV-002)



5.82.3 In conducting the performance tests required in 40 CFR Section 60.8, the Permittee shall use as a reference methods and procedures the test methods specified in 40 CFR pt. 60, Appendices A-1 through A-7 or other methods and procedures as specified in 40 CFR Section 60.675, except as provided in 40 CFR Section 60.8(b). The Permittee shall determine compliance with the particulate matter standards in 40 CFR Section 60.672(a) as follows: - Method 5 of 40 CFR pt. 60, Appendix A-3 or Method 17 of 40 CFR pt. 60, Appendix A-6 shall be used to determine the particulate matter concentration. The sample volume shall be at least 1.70 dscm (60 dscf). For Method 5 (40 CFR pt. 60, Appendix A-3), if the gas stream being sampled is at ambient temperature, the sampling probe and filter may be operated without heaters. If the gas stream is above ambient temperature, the sampling probe and filter may be operated at a temperature high enough, but no higher than 121 degrees C (250 degrees F), to prevent water condensation on the filter. - Method 9 of 40 CFR pt. 60, Appendix A-4 and the procedures in 40 CFR Section 60.11 shall be used to determine opacity. [40 CFR 60.675(a), 40 CFR 60.675(b), Minn. R. 7011.3350]








EQUI 175 Fluxstone Winter Conveying (CV-001B to CV-002)







5.83.7 The Permittee shall submit written reports of the results of all performance tests conducted to demonstrate compliance with the standards set forth in 40 CFR Section 60.672, including reports of opacity observations made using Method 9 (40 CFR pt. 60, Appendix A-4) to demonstrate compliance


Requirement number Requirement and citation with 40 CFR Section 60.672(e). [40 CFR 60.676(f), Minn. R. 7011.3350]


EQUI 181 Fluxstone Conveying (CV-003 to Stockpile)

5.84.1 Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. [Minn. R. 7011.0715, subp. 1(A)]


EQUI 184 Fluxstone Crusher (CV-005 to Roll Crusher to CV-006)











EQUI 206 Fluxstone Reclaiming (Loader to Hopper)



EQUI 208 Space Heater (Pellet Plant, Conv 21A Head)

5.87.1 Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. [Minn. R. 7011.0610, subp. 1(A)(1)]


5.87.3 Fuel type: Natural gas only, by design. [Minn. R. 7005.0100, subp. 35a]

5.87.4 The Permittee shall keep records of fuel purchases showing fuel types. [Minn. R. 7007.0800, subp. 5]

EQUI 209 Space Heater (Line 1, Plant, Col B1-22 Grade)

5.88.1 Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R. 7011.0730 or Minn. R. 7011.0735. [Minn. R. 7011.0610, subp. 1(A)(1)]


5.88.3 Fuel type: Natural gas only, by design. [Minn. R. 7005.0100, subp. 35a]

5.88.4 The Permittee shall keep records of fuel purchases showing fuel types. [Minn. R. 7007.0800, subp. 5]

FUGI 18 Unpaved Roads - Light Truck Traffic Around Plant

5.89.1 The Permittee shall comply with all applicable fugitive dust control provisions for the subject item set forth in the Fugitive Dust Control Plan, which can be found in Appendix E of this permit. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


5.89.3 The Permittee shall keep records of fugitive emissions control measures taken by the facility for a minimum of five years. This includes visible emission checks, water truck operating hours, chemical usage, wind that delays operations, and training records. [Minn. R. 7007.0800, subp. 5]


FUGI 19 Unpaved Roads - Coarse Tailings to Tailings Basin

5.90.1 The Permittee shall comply with all applicable fugitive dust control provisions for the subject item set forth in the Fugitive Dust Control Plan, which can be found in Appendix E of this permit. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.90.2 Visible Emissions Check: The Permittee shall check visible emissions once daily when in operation during daylight hours using the visible emissions checklist for all sources included in Appendix B. If, based on completion of the checklist, the Permittee determines that additional investigative or


Requirement number Requirement and citation remedial action is required, the Permittee shall investigate process and control equipment, and, if necessary, implement appropriate corrective action. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]



FUGI 35 Fluxstone Railcar Winter Unloading (Railcar to Hopper)





5.91.5 The Permittee shall keep records of fugitive emissions control measures taken by the facility for a minimum of five years. This includes visible emission checks, wind that delays operations, and training records. [Minn. R. 7007.0800, subp. 5]


FUGI 36 Fluxstone Railcar Winter Unloading (Hopper to CV-001B)

5.92.1 Opacity <= 7 percent opacity. [40 CFR 60.672(b), 40 CFR pt. 60, subp. OOO(Table 3), Minn. R. 7011.3350]

5.92.2 In determining compliance with the particulate matter standards in 40 CFR Section 60.672(b), the Permittee shall use Method 9 of 40 CFR pt. 60, Appendix A-4 and the procedures in 40 CFR Section 60.11, with the following additions: - The minimum distance between the observer and the emission source shall be 4.57 meters (15 feet). - The observer shall, when possible, select a position that minimizes interference from other fugitive emission sources (e.g., road dust). The required observer position relative to the sun (Method 9 of 40 CFR pt. 60, Appendix A-4, Section 2.1) must be followed. [40 CFR 60.675(c)(1), Minn. R. 7011.3350]

5.92.3 When determining compliance with the fugitive emissions standard for any affected facility described under 40 CFR Section 60.672(b), the duration of the Method 9 (40 CFR pt. 60, Appendix A-4) observations must be 30 minutes (five 6-minute averages). Compliance with the applicable fugitive emission limits in 40 CFR pt. 60, subp. OOO, Table 3 must be based on the average of the five 6-minute averages. [40 CFR 60.675(c)(3), Minn. R. 7011.3350]

5.92.4 Recordkeeping: The Permittee shall maintain records of the occurrence and duration of any startup, shutdown, or malfunction in the operation of the facility including; any malfunction of the air pollution control equipment; or any periods during which a continuous monitoring system or


Requirement number Requirement and citation monitoring device is inoperative. [40 CFR 60.7(b), Minn. R. 7019.0100, subp. 1]





5.92.9 The Permittee shall submit a notification of anticipated date for conducting opacity observations : Due 30 calendar days before Opacity Observation Date. For performance tests involving only Method 9 (40 CFR pt. 60, Appendix A-4) testing, the Permittee may reduce the 30-day advance notification of performance test in 40 CFR Sections 60.7(a)(6) and 60.8(d) to a 7-day advance notification. [40 CFR 60.675(g), 40 CFR 60.7(a)(6), Minn. R. 7011.3350, Minn. R. 7019.0100, subp. 1]

FUGI 37 Unpaved Roads - Trucks Hauling Concentrate





FUGI 38 Paved Roads - Trucks Hauling Concentrate







TREA 1 Fabric Filter - Donaldson-Torit

5.95.1 The control equipment is considered listed control equipment under Minn. R. 7011.0060 to 7011.0080. The Permittee shall vent emissions from EQUI 171 to TREA 1 whenever EQUI 171 operates, and operate and maintain TREA 1 at all times that any emissions are vented to TREA 1. The Permittee shall document periods of non-operation of the control equipment. [Minn. R. 7011.0075, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.95.2 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for Total Particulate Matter >= 99 percent control efficiency. [Minn. R. 7011.0070, subp. 1(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.95.3 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for PM < 10 micron >= 93 percent control efficiency. [Minn. R. 7011.0070, subp. 1(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.95.4 Pressure Drop >= 0.5 and <= 10.0 inches of water as indicated by the manufacturer's specifications, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3 based on the values recorded during the most recent MPCA-approved performance test where compliance was demonstrated. The new range shall be implemented upon receipt of the Notice of Compliance letter granting preliminary approval. The range is final upon issuance of a permit amendment incorporating the change. The Permittee shall record the pressure drop at least once every 24 hours when in operation. [Minn. R. 7011.0080, Title I Condition: Avoid major source under 40 CFR 52.21(b)(1)(i) and Minn. R. 7007.3000]

5.95.5 The Permittee shall maintain each piece of control equipment according to the manufacturer's specification, shall conduct inspections, and maintain documentation of those actions as required by Minn. R. 7011.0075, subp. 2(A) to 2(I). [Minn. R. 7011.0075, subp. 2]

5.95.6 The Permittee shall operate and maintain a bag leak detection system for the fabric filter at all times that the fabric filter and emission unit controlled by the fabric filter is in operation. Operation and maintenance of the bag leak detection system shall be included in the O&M plan for the fabric filter. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]

5.95.7 Monitoring Equipment: The Permittee shall install and maintain the necessary monitoring equipment for measuring and recording pressure drop as required by this permit. The monitoring equipment must be installed, in use, and properly maintained when the monitored fabric filter is in operation. [Minn. R. 7011.0075, subp. 3]


5.95.9 Pressure Drop: Recordkeeping of Pressure Drop. The Permittee shall record the time and date of each pressure drop reading and whether or not the recorded pressure drop was within the range specified in this permit. [Minn. R. 7011.0080]














5.97.1 The control equipment is considered listed control equipment under Minn. R. 7011.0060 to 7011.0080.


Requirement number Requirement and citation The Permittee shall vent emissions from EQUI 173 to TREA 3 whenever EQUIs 173 operates. The Permittee shall vent emissions from EQUI 174 to TREA 3 whenever EQUIs 174 operates. The Permittee shall vent emissions from EQUI 175 to TREA 3 whenever EQUIs 175 operates. The Permittee shall operate and maintain TREA 3 at all times that any emissions are vented to TREA 3. The Permittee shall document periods of non-operation of the control equipment. [Minn. R. 7011.0075, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]







5.97.8 As an alternative to the periodic Method 22 visible emissions inspections specified in 40 CFR Section 60.674(c), the Permittee of an affected facility under 40 CFR pt. 60, subp. OOO that uses a baghouse to control emissions may use a bag leak detection system. The Permittee must install, operate, and maintain a bag leak detection system according to 40 CFR Section 60.674(d)(1) - (3). [40 CFR 60.674(c), 40 CFR 60.674(d), Minn. R. 7011.3350]

5.97.9 Each bag leak detection system must meet the following specifications and requirements: 1. The bag leak detection system must be certified by the manufacturer to be capable of detecting PM emissions at concentrations of 1 milligram per dry standard cubic meter (0.00044 grains per actual cubic foot) or less. 2. The bag leak detection system sensor must provide output of relative PM loadings. The Permittee shall continuously record the output from the bag leak detection system using electronic or other means (e.g., using a strip chart recorder or a data logger). 3. The bag leak detection system must be equipped with an alarm system that will sound when the system detects an increase in relative particulate loading over the alarm set point established according 40 CFR Section 60.674(d)(1)(iv), and the alarm must be located such that it can be heard by the appropriate plant personnel.


Requirement number Requirement and citation 4. In the initial adjustment of the bag leak detection system, the Permittee must establish, at a minimum, the baseline output by adjusting the sensitivity (range) and the averaging period of the device, the alarm set points, and the alarm delay time. 5. Following initial adjustment, the Permittee shall not adjust the averaging period, alarm set point, or alarm delay time without approval from the Commissioner except as provided in 40 CFR Section 60.674(d)(1)(vi). 6. Once per quarter, the Permittee may adjust the sensitivity of the bag leak detection system to account for seasonal effects, including temperature and humidity, according to the procedures identified in the site-specific monitoring plan required by 40 CFR Section 60.674(d)(2). 7. The Permittee must install the bag leak detection sensor downstream of the fabric filter. 8. Where multiple detectors are required, the system's instrumentation and alarm may be shared among detectors. [40 CFR 60.674(d)(1), Minn. R. 7011.3350]

5.97.10 The Permittee of the affected facility under 40 CFR pt. 60, subp. OOO must develop and submit to the Commissioner for approval of a site-specific monitoring plan for each bag leak detection system. The Permittee must operate and maintain the bag leak detection system according to the site-specific monitoring plan at all times. Each monitoring plan must describe the following: 1. Installation of the bag leak detection system; 2. Initial and periodic adjustment of the bag leak detection system, including how the alarm set-point will be established; 3. Operation of the bag leak detection system, including quality assurance procedures; 4. How the bag leak detection system will be maintained, including a routine maintenance schedule and spare parts inventory list; 5. How the bag leak detection system output will be recorded and stored; and 6. Corrective action procedures as specified in 40 CFR Section 60.674(d)(3). [40 CFR 60.674(d)(2), Minn. R. 7011.3350]

5.97.11 For each bag leak detection system, the Permittee must initiate procedures to determine the cause of every alarm within 1 hour of the alarm. Except as provided 40 CFR Section 60.674(d)(2)(vi), the Permittee must alleviate the cause of the alarm within 3 hours of the alarm by taking whatever corrective action(s) are necessary. Corrective actions may include, but are not limited to the following: 1. Inspecting the fabric filter for air leaks, torn or broken bags or filter media, or any other condition that may cause an increase in PM emissions; 2. Sealing off defective bags or filter media; 3. Replacing defective bags or filter media or otherwise repairing the control device; 4. Sealing off a defective fabric filter compartment; 5. Cleaning the bag leak detection system probe or otherwise repairing the bag leak detection system; or 6. Shutting down the process producing the PM emissions. [40 CFR 60.674(d)(3), Minn. R. 7011.3350]

5.97.12 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the alarm for the bag leak detector is triggered; or - the recorded pressure drop is outside the required operating range; or - the fabric filter or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop to within the permitted range and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the fabric filter. The Permittee shall keep a record of the type and date of any corrective action taken for each filter. [Minn. R.


Requirement number Requirement and citation 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5]

5.97.13 For each bag leak detection system installed and operated according to 40 CFR Section 60.674(d), the Permittee must keep the following records: 1. Records of the bag leak detection system output; 2. Records of bag leak detection system adjustments, including the date and time of the adjustment, the initial bag leak detection system settings, and the final bag leak detection system settings; and 3. The date and time of all bag leak detection system alarms, the time that procedures to determine the cause of the alarm were initiated, the cause of the alarm, an explanation of the actions taken, the date and time the cause of the alarm was alleviated, and whether the cause of the alarm was alleviated within 3 hours of the alarm. [40 CFR 60.676(b)(2), Minn. R. 7011.3350]










5.98.8 As an alternative to the periodic Method 22 visible emissions inspections specified in 40 CFR Section 60.674(c), the Permittee of an affected facility under 40 CFR pt. 60, subp. OOO that uses a baghouse to control emissions may use a bag leak detection system. The Permittee must install, operate, and maintain a bag leak detection system according to 40 CFR Section 60.674(d)(1) - (3). [40 CFR


Requirement number Requirement and citation 60.674(c), 40 CFR 60.674(d), Minn. R. 7011.3350]

5.98.9 Each bag leak detection system must meet the following specifications and requirements: 1. The bag leak detection system must be certified by the manufacturer to be capable of detecting PM emissions at concentrations of 1 milligram per dry standard cubic meter (0.00044 grains per actual cubic foot) or less. 2. The bag leak detection system sensor must provide output of relative PM loadings. The Permittee shall continuously record the output from the bag leak detection system using electronic or other means (e.g., using a strip chart recorder or a data logger). 3. The bag leak detection system must be equipped with an alarm system that will sound when the system detects an increase in relative particulate loading over the alarm set point established according 40 CFR Section 60.674(d)(1)(iv), and the alarm must be located such that it can be heard by the appropriate plant personnel. 4. In the initial adjustment of the bag leak detection system, the Permittee must establish, at a minimum, the baseline output by adjusting the sensitivity (range) and the averaging period of the device, the alarm set points, and the alarm delay time. 5. Following initial adjustment, the Permittee shall not adjust the averaging period, alarm set point, or alarm delay time without approval from the Commissioner except as provided in 40 CFR Section 60.674(d)(1)(vi). 6. Once per quarter, the Permittee may adjust the sensitivity of the bag leak detection system to account for seasonal effects, including temperature and humidity, according to the procedures identified in the site-specific monitoring plan required by 40 CFR Section 60.674(d)(2). 7. The Permittee must install the bag leak detection sensor downstream of the fabric filter. 8. Where multiple detectors are required, the system's instrumentation and alarm may be shared among detectors. [40 CFR 60.674(d)(1), Minn. R. 7011.3350]


5.98.11 For each bag leak detection system, the Permittee must initiate procedures to determine the cause of every alarm within 1 hour of the alarm. Except as provided 40 CFR Section 60.674(d)(2)(vi), the Permittee must alleviate the cause of the alarm within 3 hours of the alarm by taking whatever corrective action(s) are necessary. Corrective actions may include, but are not limited to the following: 1. Inspecting the fabric filter for air leaks, torn or broken bags or filter media, or any other condition that may cause an increase in PM emissions; 2. Sealing off defective bags or filter media; 3. Replacing defective bags or filter media or otherwise repairing the control device; 4. Sealing off a defective fabric filter compartment; 5. Cleaning the bag leak detection system probe or otherwise repairing the bag leak detection system;


Requirement number Requirement and citation or 6. Shutting down the process producing the PM emissions. [40 CFR 60.674(d)(3), Minn. R. 7011.3350]





5.99.1 The control equipment is considered listed control equipment under Minn. R. 7011.0060 to 7011.0080. The Permittee shall vent emissions from EQUI 177 to TREA 5 whenever EQUI 177 operates. The Permittee shall vent emissions from EQUI 178 to TREA 5 whenever EQUI 178 operates. The Permittee shall operate and maintain TREA 5 at all times that any emissions are vented to TREA 5. The Permittee shall document periods of non-operation of the control equipment. [Minn. R. 7011.0075, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



5.99.4 Pressure Drop >= 0.5 and <= 10.0 inches of water as indicated by the manufacturer's specifications, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3 based on the values recorded during the most recent MPCA-approved performance test where compliance was demonstrated. The new range shall be implemented upon receipt of the Notice of Compliance letter granting preliminary approval. The range is final upon issuance of a permit amendment incorporating the change. The Permittee shall record the pressure drop at least once every 24 hours when in operation. [Minn. R.


Requirement number Requirement and citation 7011.0080, Title I Condition: Avoid major source under 40 CFR 52.21(b)(1)(i) and Minn. R. 7007.3000]





5.99.9 Each bag leak detection system must meet the following specifications and requirements: 1. The bag leak detection system must be certified by the manufacturer to be capable of detecting PM emissions at concentrations of 1 milligram per dry standard cubic meter (0.00044 grains per actual cubic foot) or less. 2. The bag leak detection system sensor must provide output of relative PM loadings. The Permittee shall continuously record the output from the bag leak detection system using electronic or other means (e.g., using a strip chart recorder or a data logger). 3. The bag leak detection system must be equipped with an alarm system that will sound when the system detects an increase in relative particulate loading over the alarm set point established according 40 CFR Section 60.674(d)(1)(iv), and the alarm must be located such that it can be heard by the appropriate plant personnel. 4. In the initial adjustment of the bag leak detection system, the Permittee must establish, at a minimum, the baseline output by adjusting the sensitivity (range) and the averaging period of the device, the alarm set points, and the alarm delay time. 5. Following initial adjustment, the Permittee shall not adjust the averaging period, alarm set point, or alarm delay time without approval from the Commissioner except as provided in 40 CFR Section 60.674(d)(1)(vi). 6. Once per quarter, the Permittee may adjust the sensitivity of the bag leak detection system to account for seasonal effects, including temperature and humidity, according to the procedures identified in the site-specific monitoring plan required by 40 CFR Section 60.674(d)(2). 7. The Permittee must install the bag leak detection sensor downstream of the fabric filter. 8. Where multiple detectors are required, the system's instrumentation and alarm may be shared among detectors. [40 CFR 60.674(d)(1), Minn. R. 7011.3350]

5.99.10 The Permittee of the affected facility under 40 CFR pt. 60, subp. OOO must develop and submit to the Commissioner for approval of a site-specific monitoring plan for each bag leak detection system. The Permittee must operate and maintain the bag leak detection system according to the site-specific monitoring plan at all times. Each monitoring plan must describe the following: 1. Installation of the bag leak detection system; 2. Initial and periodic adjustment of the bag leak detection system, including how the alarm set-point will be established; 3. Operation of the bag leak detection system, including quality assurance procedures;


Requirement number Requirement and citation 4. How the bag leak detection system will be maintained, including a routine maintenance schedule and spare parts inventory list; 5. How the bag leak detection system output will be recorded and stored; and 6. Corrective action procedures as specified in 40 CFR Section 60.674(d)(3). [40 CFR 60.674(d)(2), Minn. R. 7011.3350]






5.100.1 The control equipment is considered listed control equipment under Minn. R. 7011.0060 to 7011.0080. The Permittee shall vent emissions from EQUI 179 to TREA 6 whenever EQUI 179 operates. The Permittee shall vent emissions from EQUI 183 to TREA 6 whenever EQUI 183 operates. The Permittee shall vent emissions from EQUI 205 to TREA 6 whenever EQUI 205 operates.


Requirement number Requirement and citation The Permittee shall operate and maintain TREA 6 at all times that any emissions are vented to TREA 6. The Permittee shall document periods of non-operation of the control equipment. [Minn. R. 7011.0075, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]








5.100.9 Each bag leak detection system must meet the following specifications and requirements: 1. The bag leak detection system must be certified by the manufacturer to be capable of detecting PM emissions at concentrations of 1 milligram per dry standard cubic meter (0.00044 grains per actual cubic foot) or less. 2. The bag leak detection system sensor must provide output of relative PM loadings. The Permittee shall continuously record the output from the bag leak detection system using electronic or other means (e.g., using a strip chart recorder or a data logger). 3. The bag leak detection system must be equipped with an alarm system that will sound when the system detects an increase in relative particulate loading over the alarm set point established according 40 CFR Section 60.674(d)(1)(iv), and the alarm must be located such that it can be heard by the appropriate plant personnel. 4. In the initial adjustment of the bag leak detection system, the Permittee must establish, at a minimum, the baseline output by adjusting the sensitivity (range) and the averaging period of the device, the alarm set points, and the alarm delay time.


Requirement number Requirement and citation 5. Following initial adjustment, the Permittee shall not adjust the averaging period, alarm set point, or alarm delay time without approval from the Commissioner except as provided in 40 CFR Section 60.674(d)(1)(vi). 6. Once per quarter, the Permittee may adjust the sensitivity of the bag leak detection system to account for seasonal effects, including temperature and humidity, according to the procedures identified in the site-specific monitoring plan required by 40 CFR Section 60.674(d)(2). 7. The Permittee must install the bag leak detection sensor downstream of the fabric filter. 8. Where multiple detectors are required, the system's instrumentation and alarm may be shared among detectors. [40 CFR 60.674(d)(1), Minn. R. 7011.3350]




5.100.13 For each bag leak detection system installed and operated according to 40 CFR Section 60.674(d), the


Requirement number Requirement and citation Permittee must keep the following records: 1. Records of the bag leak detection system output; 2. Records of bag leak detection system adjustments, including the date and time of the adjustment, the initial bag leak detection system settings, and the final bag leak detection system settings; and 3. The date and time of all bag leak detection system alarms, the time that procedures to determine the cause of the alarm were initiated, the cause of the alarm, an explanation of the actions taken, the date and time the cause of the alarm was alleviated, and whether the cause of the alarm was alleviated within 3 hours of the alarm. [40 CFR 60.676(b)(2), Minn. R. 7011.3350]











5.101.9 Each bag leak detection system must meet the following specifications and requirements:


Requirement number Requirement and citation 1. The bag leak detection system must be certified by the manufacturer to be capable of detecting PM emissions at concentrations of 1 milligram per dry standard cubic meter (0.00044 grains per actual cubic foot) or less. 2. The bag leak detection system sensor must provide output of relative PM loadings. The Permittee shall continuously record the output from the bag leak detection system using electronic or other means (e.g., using a strip chart recorder or a data logger). 3. The bag leak detection system must be equipped with an alarm system that will sound when the system detects an increase in relative particulate loading over the alarm set point established according 40 CFR Section 60.674(d)(1)(iv), and the alarm must be located such that it can be heard by the appropriate plant personnel. 4. In the initial adjustment of the bag leak detection system, the Permittee must establish, at a minimum, the baseline output by adjusting the sensitivity (range) and the averaging period of the device, the alarm set points, and the alarm delay time. 5. Following initial adjustment, the Permittee shall not adjust the averaging period, alarm set point, or alarm delay time without approval from the Commissioner except as provided in 40 CFR Section 60.674(d)(1)(vi). 6. Once per quarter, the Permittee may adjust the sensitivity of the bag leak detection system to account for seasonal effects, including temperature and humidity, according to the procedures identified in the site-specific monitoring plan required by 40 CFR Section 60.674(d)(2). 7. The Permittee must install the bag leak detection sensor downstream of the fabric filter. 8. Where multiple detectors are required, the system's instrumentation and alarm may be shared among detectors. [40 CFR 60.674(d)(1), Minn. R. 7011.3350]













5.102.5 Pressure Drop >= 0.5 and <= 10.0 inches of water as indicated by the manufacturer's specifications, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3 based on the values recorded during the most recent MPCA-approved performance test where compliance was demonstrated. The new range shall be implemented upon receipt of the Notice of Compliance letter granting preliminary approval. The range is final upon issuance of a permit amendment incorporating the change. The Permittee shall record the pressure drop at least once every 24 hours when in operation. [Minn. R. 7011.0080, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]






5.102.9 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the alarm for the bag leak detector is triggered; or - the recorded pressure drop is outside the required operating range; or - the fabric filter or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop to within the permitted range, and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the fabric filter. The Permittee shall keep a record of the type and date of any corrective action taken for each filter. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5]



5.103.1 The control equipment is listed control equipment under Minn. R. 7011.0060 to 7011.0080. The Permittee shall vent emissions from EQUI 37 to TREA 11 whenever EQUI 37 operates, and operate and maintain TREA 11 at all times that any emissions are vented to TREA 11. The Permittee shall document periods of non-operation of the control equipment TREA 11 whenever EQUI 37 is operating. [Minn. R. 7011.0075, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]




5.103.5 Pressure Drop >= 0.5 and <= 10.0 inches of water as indicated by the manufacturer's specifications, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3 based on the values recorded during the most recent MPCA-approved performance test where compliance was demonstrated. The new range shall be implemented upon receipt of the Notice of Compliance letter granting preliminary approval. The range is final upon issuance of a permit amendment incorporating the change. The


Requirement number Requirement and citation Permittee shall record the pressure drop at least once every 24 hours when in operation. [Minn. R. 7011.0080, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]




5.103.9 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the alarm for the bag leak detector is triggered; or - the recorded pressure drop is outside the required operating range; or - the fabric filter or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop to within the permitted range, and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the fabric filter. The Permittee shall keep a record of the type and date of any corrective action taken for each filter. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5]


TREA 13 Fabric Filter - Low Temperature, i.e., T<180 Degrees F


5.104.2 If the Permittee replaces TREA 13, the replacement control must meet or exceed the control efficiency requirements of TREA 13 as well as comply with all other requirements of TREA 13. Prior to making such a change, the Permittee shall apply for and obtain the appropriate permit amendment, as applicable. If no amendment is needed for the replacement, the Permittee shall submit an electronic notice to the Agency using Form CR-05. The notice must be received by the Agency seven working days prior to the commencement/start of replacement. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.104.3 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for Particulate Matter >= 99 percent control efficiency. [Minn. R. 7011.0070, subp. 1(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.104.4 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency


Requirement number Requirement and citation for PM < 10 micron >= 93 percent control efficiency. [Minn. R. 7011.0070, subp. 1(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.104.5 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for PM < 2.5 micron >= 93 percent control efficiency. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.104.6 Pressure Drop >= 0.5 and <= 10 inches of water, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3 based on the values recorded during the most recent MPCA-approved performance test where compliance was demonstrated. The new range shall be implemented upon receipt of the Notice of Compliance letter granting preliminary approval. The range is final upon issuance of a permit amendment incorporating the change. If the recorded pressure drop is outside the required range, the emissions during that time shall be considered uncontrolled until the pressure drop is once again within the required range. The period of time for which the pressure drop is considered out of range shall be reported as a deviation. The Permittee shall record the pressure drop at least once every 24 hours when in operation. [Minn. R. 7011.0080, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.104.7 Pressure Drop: Recordkeeping of Pressure Drop. The Permittee shall record the time and date of each pressure drop reading and whether or not the recorded pressure drop was within the range specified in this permit. [Minn. R. 7011.0080, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.104.8 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the recorded pressure drop is outside the required operating range; or - the fabric filter or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop to within the permitted range, eliminate visible emissions, and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the fabric filter. The Permittee shall keep a record of the type and date of any corrective action taken for each filter. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2(A), Minn. R. 7007.0800, subp. 5]


5.104.10 The Permittee shall maintain each piece of control equipment according to the control equipment manufacturer's specifications, and shall: A. maintain an inventory of spare parts that are subject to frequent replacement, as required by the manufacturing specification or documented in records under items H and I; B. train staff on the operation and monitoring of control equipment and troubleshooting, and train and require staff to respond to indications of malfunctioning equipment; C. thoroughly inspect all control equipment at least annually, or as required by the manufacturing specification; D. inspect monthly, or as required by the manufacturing specification, components that are subject to wear or plugging, for example: bearings, belts, hoses, fans, nozzles, orifices, and ducts; E. inspect quarterly, or as required by the manufacturing specification, components that are not subject to wear including structural components, housings, ducts, and hoods; F. check daily, or as required by the manufacturing specification, monitoring equipment, for example: pressure gauges, chart recorders, temperature indicators, and recorders; G. calibrate (or replace) annually, or as required by the manufacturing specification, all monitoring


Requirement number Requirement and citation equipment; H. maintain a record of activities conducted in items A to G consisting of the activity completed, the date the activity was completed, and any corrective action taken; and I. maintain a record of parts replaced, repaired, or modified for the previous five years. [Minn. R. 7011.0075, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


5.105.1 Pressure Drop >= 0.9 and <= 4.9 inches of water as determined during the 05/29/2015 performance test on EQUI 22, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3 based on the values recorded during the most recent MPCA-approved performance test where compliance was demonstrated. The new range shall be implemented upon receipt of the Notice of Compliance letter granting preliminary approval. The range is final upon issuance of a permit amendment incorporating the change. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp.2, Minn. R. 7017.2025, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


5.106.1 Pressure Drop >= 0.5 and <= 10.0 inches of water as indicated by the manufacturer's specifications, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3 based on the values recorded during the most recent MPCA-approved performance test where compliance was demonstrated. The new range shall be implemented upon receipt of the Notice of Compliance letter granting preliminary approval. The range is final upon issuance of a permit amendment incorporating the change. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7017.2025, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



TREA 17 Fabric Filter - Low Temperature





5.110.1 Pressure Drop >= 0.5 and <= 10.0 inches of water as indicated by the manufacturer's specifications,


Requirement number Requirement and citation unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3 based on the values recorded during the most recent MPCA-approved performance test where compliance was demonstrated. The new range shall be implemented upon receipt of the Notice of Compliance letter granting preliminary approval. The range is final upon issuance of a permit amendment incorporating the change. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7017.2025, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]





































TREA 36 Wet Scrubber - AAF Type N Rotoclone

5.127.1 Until installation and operation of a fabric filter, TREA 33, as required elsewhere in this permit that meets the control efficiencies specified in COMG 19 and is operated and maintained in accordance with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it achieves an overall control efficiency for Total Particulate Matter >= 94 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.127.2 Until installation and operation of a fabric filter, TREA 33, as required elsewhere in this permit that meets the control efficiencies specified in COMG 19 and is operated and maintained in accordance with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it


Requirement number Requirement and citation achieves an overall control efficiency for PM < 10 micron >= 84 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.127.3 Until installation and operation of a fabric filter, TREA 33, as required elsewhere in this permit that meets the control efficiencies specified in COMG 19 and is operated and maintained in accordance with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it achieves an overall control efficiency for PM < 2.5 micron >= 84 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.127.4 MACT Pressure Drop >= 9.5 inches of water column 24-hour block average as determined during the 1/14/2014 performance test on EQUI 22 (STRU 36), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded pressure drop is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(1), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]

5.127.5 Title V Pressure Drop >= 9.5 inches of water column 24-hour block average as determined during the 1/14/2014 performance test on EQUI 22 (STRU 36). [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]

5.127.6 MACT Water flow rate >= 36.5 gallons per minute 24-hour block average as determined during the 1/14/2014 performance test on EQUI 22 (STRU 36), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow rate is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(1), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]

5.127.7 Title V Water flow rate >= 36.5 gallons per minute 24-hour block average as determined during the 1/14/2014 performance test on EQUI 22 (STRU 36). [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]


5.128.1 Until installation and operation of a fabric filter, TREA 34, as required elsewhere in this permit that meets the control efficiencies specified in COMG 19 and is operated and maintained in accordance with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it achieves an overall control efficiency for Total Particulate Matter >= 94 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.128.2 Until installation and operation of a fabric filter, TREA 34, as required elsewhere in this permit that meets the control efficiencies specified in COMG 19 and is operated and maintained in accordance with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it achieves an overall control efficiency for PM < 10 micron >= 84 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.128.3 Until installation and operation of a fabric filter, TREA 34, as required elsewhere in this permit that meets the control efficiencies specified in COMG 19 and is operated and maintained in accordance with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it achieves an overall control efficiency for PM < 2.5 micron >= 84 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.128.4 MACT Pressure Drop >= 9.5 inches of water column 24-hour block average as determined during the


Requirement number Requirement and citation 1/14/2014 performance test on EQUI 22 (STRU 36), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded pressure drop is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(1), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]







TREA 43 Wet Scrubber - Ducon UW-4



5.130.3 MACT Water flow rate >= 175.4 gallons per minute 24-hour block average as determined during the 5/14/2012 performance test on EQUI 129 (STRU 4), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow


Requirement number Requirement and citation rate is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(2), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]

5.130.4 Pressure Drop: Monitor and record the daily average gas stream pressure drop across the control device. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.130.5 Water flow rate: Monitor and record when in operation the average daily scrubber water flow rate across the control device. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]


5.131.1 Until installation and operation of the fabric filter, TREA 23, as required elsewhere in this permit that meets the control efficiencies specified in COMG 17 and is operated and maintained in accordance with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it achieves an overall control efficiency for Total Particulate Matter >= 94 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.131.2 Until installation and operation of the fabric filter, TREA 23, as required elsewhere in this permit that meets the control efficiencies specified in COMG 17 and is operated and maintained in accordance with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it achieves an overall control efficiency for PM < 10 micron >= 84 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.131.3 Until installation and operation of the fabric filter, TREA 23, as required elsewhere in this permit that meets the control efficiencies specified in COMG 17 and is operated and maintained in accordance with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it achieves an overall control efficiency for PM < 2.5 micron >= 84 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

















5.133.2 Until installation and operation of the fabric filter, TREA 24, as required elsewhere in this permit that meets the control efficiencies specified in COMG 17 and is operated and maintained in accordance


Requirement number Requirement and citation with the requirements therein, the Permittee shall operate and maintain the wet scrubber such that it achieves an overall control efficiency for PM < 10 micron >= 84 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]













5.134.5 Title V Pressure Drop >= 9.58 inches of water column 24-hour block average measured across the wet scrubber. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]


5.134.7 Title V Water flow rate >= 26.8 gallons per minute 24-hour block average. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]







5.135.6 MACT Water flow rate >= 32.7 gallons per minute 24-hour block average as determined during the 10/18/2017 performance test on EQUI 20 (STRU 37), unless a new range is set pursuant to 40 CFR


Requirement number Requirement and citation section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow rate is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(1), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]

5.135.7 Title V Water flow rate >= 25.9 gallons per minute 24-hour block average. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]



5.136.2 MACT Pressure Drop >= 2.4 inches of water column 24-hour block average as determined during the 2/13/2007-2/22/2007 performance test on EQUI 127 (STRU 22), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded pressure drop is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(2), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]

5.136.3 MACT Water flow rate >= 40.8 gallons per minute 24-hour block average as determined during the 2/13/2007-2/22/2007 performance test on EQUI 127 (STRU 22), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow rate is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(2), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]






5.137.3 MACT Water flow rate >= 48.1 gallons per minute 24-hour block average as determined during the 2/13/2007-2/22/2007 performance test on EQUI 128 (STRU 21), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow rate is outside the required range, the permittee shall follow the procedures and reporting


Requirement number Requirement and citation requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(2), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]












5.139.3 MACT Water flow rate >= 40 gallons per minute 24-hour block average as determined during the 4/19/2008-4/26/2008 performance test on EQUI 130 (STRU 18), unless a new range is set pursuant to


Requirement number Requirement and citation 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow rate is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(2), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]





5.140.2 MACT Pressure Drop >= 4 inches of water column 24-hour block average as determined during the 6/26/2007-6/28/2007 performance test on EQUI 131 (STRU 17), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded pressure drop is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(2), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]












TREA 59 Wet Scrubber - Ducon AUW

5.142.1 The Permittee shall vent emissions from EQUI 62 to TREA 59 whenever EQUI 62 operates. The Permittee shall vent emissions from EQUI 63 to TREA 59 whenever EQUI 63 operates. The Permittee shall vent emissions from EQUI 64 to TREA 59 whenever EQUI 64 operates. The Permittee shall vent emissions from EQUI 65 to TREA 59 whenever EQUI 65 operates. The Permittee shall operate and maintain TREA 59 at all times that any emissions are vented to TREA 59. The Permittee shall document periods of non-operation of the control equipment. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]

5.142.2 MACT Pressure Drop >= 8.9 inches of water column 24-hour block average as determined during the 1/29/2009 performance test on EQUIs 62-65 (STRU 62), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded pressure drop is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(2), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]

5.142.3 MACT Water flow rate >= 51.6 gallons per minute 24-hour block average as determined during the 1/29/2009 performance test on EQUIs 62-65 (STRU 62), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow rate is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(2), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]

5.142.4 Pressure Drop: The Permittee shall install, calibrate, maintain, and operate a monitoring device for the wet scrubber for the continuous measurement of the change in pressure of the gas stream through the wet scrubber. The monitoring device must be certified by the manufacturer to be accurate within 250 pascals (1 inch water) gauge pressure, plus or minus; and must be calibrated on an annual basis in accordance with manufacturer's instructions. [40 CFR 60.384(a), Minn. R. 7011.2700]

5.142.5 Liquid Flow Rate: The Permittee shall install, calibrate, maintain, and operate a monitoring device for the wet scrubber for the continuous measurement of the scrubbing liquid flow rate to the wet scrubber. The monitoring device must be certified by the manufacturer to be accurate within 5 percent, plus or minus, of design scrubbing liquid flow rate; and must be calibrated at least on an annual basis in accordance with manufacturer's instructions. [40 CFR 60.384(b), Minn. R. 7011.2700]

5.142.6 The Permittee shall record the measurements of both the change in pressure of the gas stream across the scrubber and the scrubbing liquid flow rate at least weekly. [40 CFR 60.385(b), Minn. R.


Requirement number Requirement and citation 7011.2700]

5.142.7 Control Equipment Monitoring: Record Gas Stream Pressure Drop and Liquid Flow Rate data for the wet scrubber each day in operation. This requirement is more stringent than the requirement prescribed by 40 CFR Section 60.385(b) which also applies. [Minn. R. 7007.0800, subps. 4-5]

5.142.8 The Permittee shall submit semiannual reports of occurrences when the measurements of wet scrubber pressure loss (or gain) or liquid flow rate differ by more than 30 percent, plus or minus, from the average obtained during the most recent performance test. The semiannual reports shall be postmarked within 30 days following the end of the second and fourth calendar quarters. [40 CFR 60.385(c), 40 CFR 60.385(d), Minn. R. 7011.2700]







TREA 62 Wet Scrubber - AAF Type W Rotoclone


5.144.2 MACT Water flow rate >= 10.3 gallons per minute 24-hour block average as determined during the 2/13/2007-2/22/2007 performance test on EQUI 122 (STRU 29), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow rate is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(1), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R.


Requirement number Requirement and citation 7011.8030]










TREA 68 Wet Scrubber - AAF Type W Rotoclone

5.148.1 MACT Pressure Drop >= 2.8 inches of water column 24-hour block average as determined during the


Requirement number Requirement and citation 2/13/2007-2/22/2007 performance test on EQUI 122 (STRU 29), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded pressure drop is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(1), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]









5.150.4 Pressure Drop: Monitor and record the daily average gas stream pressure drop across the control device. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp.


Requirement number Requirement and citation 4(D)]



5.151.1 MACT Pressure Drop >= 9 inches of water column 24-hour block average as determined during the 4/4/2012 performance test on EQUI 125 (STRU 26), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded pressure drop is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(1), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]

5.151.2 MACT Water flow rate >= 37 gallons per minute 24-hour block average as determined during the 4/4/2012 performance test on EQUI 125 (STRU 26), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow rate is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(1), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]






5.153.2 MACT Water flow rate >= 44 gallons per minute 24-hour block average as determined during the 2/13/2007-2/22/2007 performance test on EQUI 119 (STRU 41), unless a new range is set pursuant to 40 CFR section 63.9622(f), Minn. R. 7017.2025, subp. 3 and detailed in COMG 16. If the recorded water flow rate is outside the required range, the permittee shall follow the procedures and reporting requirements pursuant to 40 CFR pt. 63, subp. RRRRR as detailed in COMG 16. [40 CFR 63.9590(b)(1), Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subp. 4, Minn. R. 7011.8030]



TREA 89 Wet Scrubber - Ducon VV-O


5.154.2 The Permittee shall operate and maintain the control equipment such that it achieves an overall control efficiency for Total Particulate Matter >= 94 percent control efficiency. [Minn. R. 7011.0070, subp. 1(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.154.3 The Permittee shall operate and maintain the control equipment such that it achieves an overall control efficiency for PM < 10 micron >= 84 percent control efficiency. [Minn. R. 7011.0070, subp. 1(A), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.154.4 The Permittee shall operate and maintain the control equipment such that it achieves an overall control efficiency for PM < 2.5 micron >= 84 percent control efficiency. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


5.154.6 Title V Pressure Drop >= 6.8 inches of water column as determined during the 7/7/2011 performance test on EQUI 47 (STRU 16). [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]


5.154.8 Title V Water flow rate >= 2254 gallons per minute as determined during the 1/25/2011 performance test on EQUI 47 (STRU 16). [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]


5.154.10 Water flow rate: Monitor and record when in operation the daily average scrubber water flow rate across the control device. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.154.11 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the recorded water flow rate is outside the required operating range; or - the recorded pressure drop is outside the required operating range; or - the scrubber or any of its components are found during the inspections to need repair.


Requirement number Requirement and citation Corrective actions shall return the pressure drop and/or water flow rate to within the permitted range, and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the scrubber. The Permittee shall keep a record of the type and date of any corrective action taken for the scrubber. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5]







5.155.6 Title V Pressure Drop >= 7.3 inches of water column as determined during the 1/25/2011 performance test on EQUI 47 (STRU 15). [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]


5.155.8 Title V Water flow rate >= 2330 gallons per minute as determined during the 8/13/2013 performance test on EQUI 47 (STRU 15). [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]


5.155.10 Water flow rate: Monitor and record when in operation the daily average scrubber water flow rate across the control device. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 16(J), Minn. R. 7007.0800, subp. 4(D)]

5.155.11 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur:


Requirement number Requirement and citation - the recorded water flow rate is outside the required operating range; or - the recorded pressure drop is outside the required operating range; or - the scrubber or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop and/or water flow rate to within the permitted range, and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the scrubber. The Permittee shall keep a record of the type and date of any corrective action taken for the scrubber. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5]









5.156.8 Title V Water flow rate >= 3614 gallons per minute 24-hour block average. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2]





5.156.11 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the recorded water flow rate is outside the required operating range; or - the recorded pressure drop is outside the required operating range; or - the scrubber or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop and/or water flow rate to within the permitted range, and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the scrubber. The Permittee shall keep a record of the type and date of any corrective action taken for the scrubber. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subps. 4-5]

TREA 92 Binder Unloading (Truck to Bin) Baghouse

5.157.1 The Permittee is authorized to construct and operate TREA 92. The authorization to start construction of this equipment expires 18 months after permit issuance of Air Emissions Permit No. 13700113-102. The control equipment shall meet all applicable permit requirements. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


5.157.3 If the Permittee replaces TREA 92, the replacement control must meet or exceed the control efficiency requirements of TREA 92 as well as comply with all other requirements of TREA 92. Prior to making such a change, the Permittee shall apply for and obtain the appropriate permit amendment, as applicable. If no amendment is needed for the replacement, the Permittee shall submit an electronic notice to the Agency using Form CR-05. The notice must be received by the Agency seven working days prior to the commencement/start of replacement. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.157.4 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for Particulate Matter >= 99 percent control efficiency. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.157.5 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for PM < 10 micron >= 93 percent control efficiency. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.157.6 The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for PM < 2.5 micron >= 93 percent control efficiency. [Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.157.7 Pressure Drop >= 0.5 and <= 10 inches of water, unless a new range is set pursuant to Minn. R. 7017.2025, subp. 3 based on the values recorded during the most recent MPCA-approved performance test where compliance was demonstrated. The new range shall be implemented upon receipt of the Notice of Compliance letter granting preliminary approval. The range is final upon issuance of a permit amendment incorporating the change.


Requirement number Requirement and citation If the recorded pressure drop is outside the required range, the emissions during that time shall be considered uncontrolled until the pressure drop is once again within the required range. The period of time for which the pressure drop is considered out of range shall be reported as a deviation. The Permittee shall record the pressure drop at least once every 24 hours when in operation. [Minn. R. 7011.0080, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.157.8 Pressure Drop: Recordkeeping of Pressure Drop. The Permittee shall record the time and date of each pressure drop reading and whether or not the recorded pressure drop was within the range specified in this permit. [Minn. R. 7011.0080, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

5.157.9 The Permittee shall operate and maintain a bag leak detector at all times that the fabric filter and emission unit controlled by the fabric filter is in operation. Operation and maintenance of the bag leak detector shall be included in the O & M Plan. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2(A), Minn. R. 7007.0800, subp. 2(D)]

5.157.10 Corrective Actions: The Permittee shall take corrective action as soon as possible if any of the following occur: - the alarm for the bag leak detector is triggered; - the recorded pressure drop is outside the required operating range; or - the fabric filter or any of its components are found during the inspections to need repair. Corrective actions shall return the pressure drop to within the permitted range, and/or include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the fabric filter. The Permittee shall keep a record of the type and date of any corrective action taken for each filter. [Minn. R. 7007.0800, subp. 14, Minn. R. 7007.0800, subp. 2(A), Minn. R. 7007.0800, subp. 5]


5.157.12 The Permittee shall maintain each piece of control equipment according to the control equipment manufacturer's specifications, and shall: A. maintain an inventory of spare parts that are subject to frequent replacement, as required by the manufacturing specification or documented in records under items H and I; B. train staff on the operation and monitoring of control equipment and troubleshooting, and train and require staff to respond to indications of malfunctioning equipment; C. thoroughly inspect all control equipment at least annually, or as required by the manufacturing specification; D. inspect monthly, or as required by the manufacturing specification, components that are subject to wear or plugging, for example: bearings, belts, hoses, fans, nozzles, orifices, and ducts; E. inspect quarterly, or as required by the manufacturing specification, components that are not subject to wear including structural components, housings, ducts, and hoods; F. check daily, or as required by the manufacturing specification, monitoring equipment, for example: pressure gauges, chart recorders, temperature indicators, and recorders; G. calibrate (or replace) annually, or as required by the manufacturing specification, all monitoring equipment; H. maintain a record of activities conducted in items A to G consisting of the activity completed, the date the activity was completed, and any corrective action taken; and I. maintain a record of parts replaced, repaired, or modified for the previous five years. [Minn. R.


Requirement number Requirement and citation 7011.0075, subp. 2, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


6. Submittal/action requirements

This section lists most of the submittals required by this permit. Please note that some submittal requirements may appear in the Limits and Other Requirements section, or, if applicable, within a Compliance Schedule section.


TFAC 1 United Taconite LLC - Fairlane Plant

6.1.1 The Permittee shall submit an annual report : Due annually, by the 31st of January summing the annual project-related mercury emissions, the annual amount of mercury emissions off-set by routing scrubber solids to the tailings basin and any banked mercury reductions held. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7007.0800, subp. 6]

6.1.2 The Permittee shall submit an annual report : Due annually, by the 31st of January. For the 22 fabric filter installations authorized in Air Permit No. 13700113-006 (i.e. TREA 14 - TREA 35), the annual report shall describe the fabric filter installations completed as of January 1st and any fabric filter installations that are planned during the calendar year in which the report is due. The report shall be submitted with the annual Compliance Certification required by this permit. For each completed fabric filter installation, the Permittee shall include in the report, at minimum, the TREA ID number, manufacturer, model, date construction commenced, date of initial startup, and the relationships to the applicable EQUI and STRU. For each planned fabric filter installation, the Permittee shall include in the report, at minimum, the anticipated TREA ID number, anticipated manufacturer, anticipated model, anticipated date construction will commence, and the relationships to the applicable EQUI and STRU. [Minn. R. 7007.0800, subp. 2]

6.1.3 The Permittee shall submit excess emission/downtime report : Due by 30 days after the end of each calendar quarter following permit issuance. Submit this on form DRF-1 (Excess Emissions Reporting) as amended. The EER shall indicate all periods of monitor bypass and exceedances of the limit including those allowed by an applicable standard, i.e. during startup, shutdown, and malfunctions, as well as a summary of audit results and frequencies. If no excess emissions, downtime or bypasses occurred during the quarter, submit a signed report supplying the necessary monitor data needed to verify this. [40 CFR 60.7(c), Minn. R. 7017.1110, subp. 1-2]

6.1.4 The Permittee shall submit a semiannual deviations report : Due semiannually, by the 30th of January and July. The first semiannual report submitted by the Permittee shall cover the calendar half-year in which the permit is issued. The first report of each calendar year covers January 1 - June 30. The second report of each calendar year covers July 1 - December 31. Submit this on form DRF-2 (Deviation Reporting Form). If no deviations have occurred, submit the signed report certifying that there were no deviations. [Minn. R. 7007.0800, subp. 6(A)(2)]

6.1.5 The Permittee shall submit an application for permit reissuance : Due 180 calendar days before Permit Expiration Date. A reissuance application was received on August 30, 2004. [Minn. R. 7007.0400, subp. 2]

6.1.6 The Permittee shall submit a compliance certification : Due annually, by the 31st of January (for the previous calendar year). Submit this on form CR-04 (Annual Compliance Certification Report). This report covers all deviations experienced during the calendar year. If no deviations have occurred, submit the signed report certifying that there were no deviations. [Minn. R. 7007.0800, subp. 6(C)]

6.1.7 The Permittee shall submit a schedule : Due annually, by the 31st of January to provide a complete summary of all performance tests required at the facility which includes the subject item, pollutant, most recent test date (if applicable), and the date of the next test on a form approved by the


Requirement number Requirement and citation Commissioner. The performance test summary shall be submitted with the Annual Compliance Certification (CR-04) Report. [Minn. R. 7007.0800, subp. 16(L)]

COMG 2 Pellet Loadout System for Line 2 after 10/13/2000 fire

6.2.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUIs 62-65 (STRU 62). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 5 or 17, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 60.385(a), 40 CFR 60.8(a), Minn. R. 7011.2700, Minn. R. 7017.2020, subp. 1]

COMG 3 Taconite MACT All Affected Sources

6.3.1 The Permittee shall submit a semiannual compliance report : Due by 30 days after end of each calendar half-year. The facility shall submit semi-annual compliance reports for 40 CFR pt. 63, subp. RRRRR. The report covering the period from January 1 through June 30 is due on July 30. The report covering the period from July 1 through December 31 is due on January 30. The report shall contain the information required by 40 CFR Section 63.9641(b)(1)-(8). This report may be submitted in conjunction with the startup, shutdown and malfunction report required by 40 CFR Section 63.10(d)(5)(i). [40 CFR 63.10(d)(5)(i), 40 CFR 63.9641(a)-(b), Minn. R. 7011.8030]

COMG 4 Taconite MACT Existing Ore Crushing and Handling

6.4.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUI 9 (STRU 47 and STRU 48). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5, 5D, or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.4.2 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5, 5D, or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section


Requirement number Requirement and citation 63.9621(b)(1)-(3). This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 11 (STRU 45), EQUI 12 (STRU 58), EQUI 13 (STRU 44), EQUI 14 (STRU 43), and EQUI 15 (STRU 42). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.4.3 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2019 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5, 5D, or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 17 (STRU 40), EQUI 18 (STRU 39), and EQUI 19 (STRU 38). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.4.4 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5, 5D, or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 20 (STRU 37) and EQUI 21 (STRU 57). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently.


Requirement number Requirement and citation Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.4.5 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2019 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5, 5D, or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 22 (STRU 36), EQUI 23 (STRU 35), and EQUI 24 (STRU 34). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.4.6 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2019 every 60 months to measure emissions from EQUI 26 (STRU 32). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5, 5D, or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.4.7 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUI 27 (STRU 31). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005,


Requirement number Requirement and citation subp. 8, using EPA Reference Method 5, 5D, or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]



6.4.10 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUI 119 (STRU 41). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5, 5D, or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3).


Requirement number Requirement and citation Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]


6.4.12 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5, 5D, or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 121 (STRU 30) and EQUI 122 (STRU 29) . Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.4.13 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference


Requirement number Requirement and citation Method 5, 5D, or 17 or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 123 (STRU 28), EQUI 124 (STRU 27), and EQUI 125 (STRU 26). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(a), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]



COMG 5 Taconite MACT Existing Indurating Furnaces



6.5.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUI 45 (STRU 53). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(c)(1)-(3). Performance tests shall be conducted at least twice per every five calendar years and must be conducted at least one year apart but no more than four years apart to measure total particulate matter emissions. This requirement represents the first of the two performance tests required for the five year calendar period beginning 12/31/2012 and ending 12/31/2017. Performance tests must be conducted on all stacks associated with EQUI 45 (STRU 53). The performance tests for all stacks associated with the indurating furnace must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(c)(1)-(3), 40 CFR 63.9630(b), 40 CFR 63.9634(c), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.5.2 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUI 45 (STRU 53). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(c)(1)-(3). Performance tests shall be conducted at least twice per every five calendar years and must be conducted at least one year apart but no more than four years apart to measure total particulate matter emissions. This requirement represents the second of the two performance tests required for the five year calendar period beginning 12/31/2012 and ending 12/31/2017. Performance tests must be conducted on all stacks associated with EQUI 45 (STRU 53). The performance tests for all stacks associated with the indurating furnace must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(c)(1)-(3), 40 CFR 63.9630(b), 40 CFR 63.9634(c), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.5.3 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017


Requirement number Requirement and citation every 60 months to measure emissions from EQUI 47 (STRU 15 and STRU 16). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(c)(1)-(3). Performance tests shall be conducted at least twice per every five calendar years and must be conducted at least one year apart but no more than four years apart to measure total particulate matter emissions. This requirement represents the first of the two performance tests required for the five year calendar period beginning 12/31/2012 and ending 12/31/2017. Performance tests must be conducted on all stacks associated with EQUI 47 (STRU 15 and STRU 16). The performance tests for all stacks associated with the indurating furnace must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(c)(1)-(3), 40 CFR 63.9630(b), 40 CFR 63.9634(c), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.5.4 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUI 47 (STRU 15 and STRU 16). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(c)(1)-(3). Performance tests shall be conducted at least twice per every five calendar years and must be conducted at least one year apart but no more than four years apart to measure total particulate matter emissions. This requirement represents the second of the two performance tests required for the five year calendar period beginning 12/31/2012 and ending 12/31/2017. Performance tests must be conducted on all stacks associated with EQUI 47 (STRU 15 and STRU 16). The performance tests for all stacks associated with the indurating furnace must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(c)(1)-(3), 40 CFR 63.9630(b), 40 CFR 63.9634(c), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

COMG 6 Taconite MACT Existing Finished Pellet Handling

6.6.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017


Requirement number Requirement and citation every 60 months to measure emissions from EQUIs 62-65 (STRU 62). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(c), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]

6.6.2 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUI 128 (STRU 21). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(c), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]


6.6.4 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUI 129 (STRU 14). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005,


Requirement number Requirement and citation subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3). Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(c), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]



6.6.7 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2017 every 60 months to measure emissions from EQUI 132 (STRU 51). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 63.9621(b)(1)-(3).


Requirement number Requirement and citation Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 63.7, 40 CFR 63.9621(b)(1)-(3), 40 CFR 63.9630(c), 40 CFR 63.9634(b), Minn. R. 7011.8030, Minn. R. 7017.2020, subp. 1]


COMG 21 Fourth Stage Crusher Performance Testing

6.7.1 This group contains the performance testing requirements to measure emissions of total particulate matter, particulate matter <10 micron, and particulate matter <2.5 micron that are required for the fourth stage crushers (EQUI 17 to EQUI 24) as a result of the modifications authorized by Air Emission Permit No. 13700113-005. Due to the differences in emission units or applied control equipment, the membership of the representative groups of emission units can be revised with MPCA approval of a performance test plan that proposes an alternate test group composition. [Minn. R. 7007.0800, subp. 2, Minn. R. 7007.0800, subps. 4-5, Minn. R. 7017.2020, subp. 1]

6.7.2 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2020 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 17 (STRU 40), EQUI 18 (STRU 39), and EQUI 19 (STRU 38). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the


Requirement number Requirement and citation performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.7.3 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2015 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 20 (STRU 37) and EQUI 21 (STRU 57). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. A one-time, 365-day extension was granted for the performance test due 12/31/2015. This performance test is now due before 12/30/2016. For recurring performance tests, extensions do not change the due date for future performance tests. Therefore, the subsequent performance test is due before 12/31/2020. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.7.4 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2020 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 22 (STRU 36), EQUI 23 (STRU 35), and EQUI 24 (STRU 34). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.7.5 PM < 10 micron : The Permittee shall conduct a performance test : Due before 12/31/2020 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted


Requirement number Requirement and citation at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 17 (STRU 40), EQUI 18 (STRU 39), and EQUI 19 (STRU 38). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.7.6 PM < 10 micron : The Permittee shall conduct a performance test : Due before 12/31/2015 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 20 (STRU 37) and EQUI 21 (STRU 57). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. A one-time, 365-day extension was granted for the performance test due 12/31/2015. This performance test is now due before 12/30/2016. For recurring performance tests, extensions do not change the due date for future performance tests. Therefore, the subsequent performance test is due before 12/31/2020. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.7.7 PM < 10 micron : The Permittee shall conduct a performance test : Due before 12/31/2020 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 22 (STRU 36), EQUI 23 (STRU 35), and EQUI 24 (STRU 34). Each performance test shall be conducted on a different stack within the pool until all stacks have been


Requirement number Requirement and citation tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.7.8 PM < 2.5 micron : The Permittee shall conduct a performance test : Due before 12/31/2020 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 17 (STRU 40), EQUI 18 (STRU 39), and EQUI 19 (STRU 38). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major source under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.7.9 PM < 2.5 micron : The Permittee shall conduct a performance test : Due before 12/31/2015 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 20 (STRU 37) and EQUI 21 (STRU 57). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date.


Requirement number Requirement and citation A one-time, 365-day extension was granted for the performance test due 12/31/2015. This performance test is now due before 12/30/2016. For recurring performance tests, extensions do not change the due date for future performance tests. Therefore, the subsequent performance test is due before 12/31/2020. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major source under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.7.10 PM < 2.5 micron : The Permittee shall conduct a performance test : Due before 12/31/2020 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. This performance test shall be conducted at the stack of a representative unit from a pool of emission units. The pool shall consist of EQUI 22 (STRU 36), EQUI 23 (STRU 35), and EQUI 24 (STRU 34). Each performance test shall be conducted on a different stack within the pool until all stacks have been tested. Subsequent performance tests shall rotate through all stacks within the pool and be conducted on the stack previously tested least recently. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major source under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

COMG 22 Fluxstone Storage Building NSPS Subpart OOO Affected Facilities

6.8.1 Opacity : The Permittee shall conduct an initial performance test : Due 60 calendar days after Date of Achieving Maximum Capacity at which the affected facilities will be operated but no later than 180 days after initial startup of the affected facilities to measure opacity of emissions from building openings. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 9, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 60.675 and 40 CFR Section 60.11. [40 CFR 60.11, 40 CFR 60.675(d)(1), 40 CFR pt. 60, subp. OOO(Table 3), Minn. R. 7011.3350, Minn. R. 7017.2020, subp. 1]

6.8.2 Opacity : The Permittee shall conduct a performance test : Due after Initial Performance Test Date every 60 months to measure opacity of emissions from building openings. Testing is due by the end of each 60 month period following the initial performance test date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 9, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 60.675 and 40 CFR Section 60.11. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 60.11, 40 CFR 60.675(d)(1), 40 CFR pt. 60, subp. OOO(Table 3), Minn. R.


Requirement number Requirement and citation 7011.3350, Minn. R. 7017.2020, subp. 1]


6.9.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due 180 calendar days after Initial Startup Date of TREA 18 to measure emissions of total particulate matter to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 0.61 tons/yr (corresponding to 0.14 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.9.2 PM < 10 micron : The Permittee shall conduct a performance test : Due 180 calendar days after Initial Startup Date of TREA 18 to measure emissions of PM < 10 micron to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 1.59 tons/yr (corresponding to 0.36 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.9.3 PM < 2.5 micron : The Permittee shall conduct a performance test : Due 180 calendar days after Initial Startup Date of TREA 18 to measure emissions of PM < 2.5 micron to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 1.59 tons/yr (corresponding to 0.36 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


6.10.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due 180 calendar days after Initial Startup Date of TREA 19 to measure emissions of total particulate matter to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 0.61 tons/yr (corresponding to 0.14 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and


Requirement number Requirement and citation Minn. R. 7007.3000]
















6.13.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due 180 calendar days after 07/11/2015 to measure emissions of total particulate matter to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 0.61 tons/yr (corresponding to 0.14 lbs/hr at 8760 hours/yr). A one-time, 365-day extension was granted for this performance test due 1/7/2016. This performance test is now due before 1/6/2017. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.13.2 PM < 10 micron : The Permittee shall conduct a performance test : Due 180 calendar days after 07/11/2015 to measure emissions of PM < 10 micron to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 1.59 tons/yr (corresponding to 0.36 lbs/hr at 8760 hours/yr). A one-time, 365-day extension was granted for the performance test due 1/7/2016. This performance test is now due before 1/6/2017. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.13.3 PM < 2.5 micron : The Permittee shall conduct a performance test : Due 180 calendar days after 07/11/2015 to measure emissions of PM < 2.5 micron to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 1.59 tons/yr (corresponding to 0.36 lbs/hr at 8760 hours/yr). A one-time, 365-day extension was granted for the performance test due 1/7/2016. This performance test is now due before 1/6/2017. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


6.14.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due 180 calendar days after Initial Startup Date of TREA 23 to measure emissions of total particulate matter to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval.


Requirement number Requirement and citation The controlled emission rate to verify is 0.61 tons/yr (corresponding to 0.14 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]





6.15.2 PM < 10 micron : The Permittee shall conduct a performance test : Due 180 calendar days after Initial Startup Date of TREA 35 to measure emissions of PM < 10 micron to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 1.63 tons/yr (corresponding to 0.37 lbs/hr at 8760 hours/yr).


Requirement number Requirement and citation [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]





6.16.3 PM < 2.5 micron : The Permittee shall conduct a performance test : Due 180 calendar days after Initial Startup Date of TREA 24 to measure emissions of PM < 2.5 micron to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 1.63 tons/yr (corresponding to 0.37 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and








6.18.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due 180 calendar days after Initial Startup Date of TREA 26 to measure emissions of total particulate matter to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 0.67 tons/yr (corresponding to 0.15 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and






6.19.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due 180 calendar days after 04/10/2015 to measure emissions of total particulate matter to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 0.79 tons/yr (corresponding to 0.18 lbs/hr at 8760 hours/yr). A one-time, 365-day extension was granted for the performance test due 10/7/2015. This performance test is now due before 10/6/2016. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

6.19.2 PM < 10 micron : The Permittee shall conduct a performance test : Due 180 calendar days after 04/10/2015 to measure emissions of PM < 10 micron to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 2.07 tons/yr (corresponding to 0.47 lbs/hr at 8760 hours/yr).


Requirement number Requirement and citation A one-time, 365-day extension was granted for the performance test due 10/7/2015. This performance test is now due before 10/6/2016. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



6.20.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due 180 calendar days after 04/12/2015 to measure emissions of total particulate matter to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 0.79 tons/yr (corresponding to 0.18 lbs/hr at 8760 hours/yr). A one-time, 365-day extension was granted for the performance test due 10/9/2015. This performance test is now due before 10/8/2016. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


6.20.3 PM < 2.5 micron : The Permittee shall conduct a performance test : Due 180 calendar days after 04/12/2015 to measure emissions of PM < 2.5 micron to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference


Requirement number Requirement and citation Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 2.07 tons/yr (corresponding to 0.47 lbs/hr at 8760 hours/yr). A one-time, 365-day extension was granted for the performance test due 10/9/2015. This performance test is now due before 10/8/2016. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]

EQUI 26 Transfer House North




EQUI 27 Transfer House South

6.22.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due 180 calendar days after 06/14/2015 to measure emissions of total particulate matter to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance


Requirement number Requirement and citation test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 1.08 tons/yr (corresponding to 0.25 lbs/hr at 8760 hours/yr). A one-time, 365-day extension was granted for the performance test due 12/11/2015. This performance test is now due before 12/10/2016. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]




6.23.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2015 every 12 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 12-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date.


Requirement number Requirement and citation A one-time, 365-day extension was granted for the performance test due 12/31/2015. This performance test is now due before 12/30/2016. For recurring performance tests, extensions do not change the due date for subsequent performance tests. Therefore the next performance test following the 12/31/2015 test is due by 12/31/2016. [Minn. R. 7017.2020, subp. 1]

6.23.2 Opacity : The Permittee shall conduct a performance test : Due before 12/31/2015 every 12 months to measure opacity of emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 12-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 9, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. A one-time, 365-day extension was granted for the performance test due 12/31/2015. This performance test is now due before 12/30/2016. For recurring performance tests, extensions do not change the due date for subsequent performance tests. Therefore the next performance test following the 12/31/2015 test is due by 12/31/2016. [Minn. R. 7017.2020, subp. 1]


6.24.1 Particulate Matter: The Permittee shall conduct a performance test due before 12/31/2021 and every 36 months thereafter to verify the emission factor of 0.0573 lb/LT of pellets produced from EQUI 45 (STRU 53) while maximizing firing solid fuel. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 5 and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.24.2 Particulate Matter: The Permittee shall conduct a performance test due before 12/31/2022 and every 36 months thereafter to verify the emission factor of 0.0357 lb/LT of pellets produced from EQUI 45 (STRU 53) while firing only natural gas. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 5 and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date


Requirement number Requirement and citation requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.24.3 PM < 10 micron: The Permittee shall conduct a performance test due before 12/31/2021 and every 36 months thereafter to verify the emission factor of 0.1101 lb/LT of pellets produced from EQUI 45 (STRU 53) while maximizing firing solid fuel. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 201A and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.24.4 PM < 10 micron: The Permittee shall conduct a performance test due before 12/31/2022 and every 36 months thereafter to verify the emission factor of 0.0631 lb/LT of pellets produced from EQUI 45 (STRU 53) while firing only natural gas. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 201A and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.24.5 PM < 2.5 micron: The Permittee shall conduct a performance test due before 12/31/2021and every 36 months thereafter to verify the emission factor of 0.1101 lb/LT of pellets produced from EQUI 45 (STRU 53) while maximizing firing solid fuel. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 201A and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.24.6 PM < 2.5 micron: The Permittee shall conduct a performance test due before 12/31/2022 and every 36 months thereafter to verify the emission factor of 0.0631 lb/LT of pellets produced from EQUI 45


Requirement number Requirement and citation (STRU 53) while firing only natural gas. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 201A and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.24.7 Mercury : The Permittee shall conduct a performance test : Due before 10/13/2016 every 60 months to measure emissions from EQUI 45 (STRU 53). The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 29, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted on all stacks associated with EQUI 45 (STRU 53) within a reasonable period of time, such that the furnace operating characteristics remain representative for the duration of the stack tests. The performance test shall comply with all MPCA stack testing requirements. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7017.2020, subp. 1, Minn. R. 7019.3050(E)]

6.24.8 The Permittee shall submit a notification of the date construction began : Due 30 calendar days after Date of Construction Start on the 8 natural-gas fired preheat burners for EQUI 45. Submit the name and number of the Subject Item and the date construction began. [Minn. R. 7007.0800, subp. 16(L)]

6.24.9 The Permittee shall submit a notification of the date construction began : Due 30 calendar days after Date of Construction Start on the replacement of the existing main kiln burners with low NOx burners for EQUI 45. Submit the name and number of the Subject Item and the date construction began. [Minn. R. 7007.0800, subp. 16(L)]

6.24.10 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date after completing the construction of the 8 natural-gas fired preheat burners for EQUI 45. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7005.0100, subp. 42a. [Minn. R. 7007.0800, subp. 16(L)]

6.24.11 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date after completing the replacement of the existing main kiln burners with low NOx burners for EQUI 45. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7005.0100, subp. 42a. [Minn. R. 7007.0800, subp. 16(L)]



6.24.12 The Permittee shall submit an annual report by the 31st of January. The report shall document the PM, PM10, and PM2.5 12-month rolling sum calculations for the previous calendar year. The report shall be submitted with the annual Compliance Certification required by this permit. As part of the Annual Report, the Permittee shall verify and certify that the facility has maintained net emissions increases below the New Source Review significant emission rates. [Minn. R. 7007.0800, subp. 16(L)]


6.25.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 12/31/2016 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1]

6.25.2 Opacity : The Permittee shall conduct a performance test : Due before 12/31/2016 every 60 months to measure opacity of emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 9, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1]


6.26.1 Particulate Matter: The Permittee shall conduct a performance test due before 12/31/2021 and every 36 months thereafter to verify the emission factor of 0.0767 lb/LT of pellets produced from EQUI 47 (STRU 15 and STRU 16) while maximizing firing solid fuel. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance tests for the 2A and 2B stacks (STRU 15 and STRU 16) must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 5 and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]



6.26.2 Particulate Matter: The Permittee shall conduct a performance test due before 12/31/2022 and every 36 months thereafter to verify the emission factor of 0.0616 lb/LT of pellets produced from EQUI 47 (STRU 15 and STRU 16) while firing only natural gas. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance tests for the 2A and 2B stacks (STRU 15 and STRU 16) must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 5 and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.26.3 PM < 10 micron: The Permittee shall conduct a performance test due before 12/31/2021 and every 36 months thereafter to verify the emission factor of 0.1009 lb/LT of pellets produced from EQUI 47 (STRU 15 and STRU 16) while maximizing firing solid fuel. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance tests for the 2A and 2B stacks (STRU 15 and STRU 16) must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 201A and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.26.4 PM < 10 micron: The Permittee shall conduct a performance test due before 12/31/2022 and every 36 months thereafter to verify the emission factor of 0.0939 lb/LT of pellets produced from EQUI 47 (STRU 15 and STRU 16) while firing only natural gas. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance tests for the 2A and 2B stacks (STRU 15 and STRU 16) must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 201A and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]



6.26.5 PM < 2.5 micron: The Permittee shall conduct a performance test due before 12/31/2021 and every 36 months thereafter to verify the emission factor of 0.1009 lb/LT of pellets produced from EQUI 47 (STRU 15 and STRU 16) while maximizing firing solid fuel. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance tests for the 2A and 2B stacks (STRU 15 and STRU 16) must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 201A and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 365 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.26.6 PM < 2.5 micron: The Permittee shall conduct a performance test due before 12/31/2022 and every 36 months thereafter to verify the emission factor of 0.0939 lb/LT of pellets produced from EQUI 47 (STRU 15 and STRU 16) while firing only natural gas. The first test is due by the date specified above and all subsequent tests shall be completed every 36 months thereafter by the due date (month and day) and as described below. The performance tests for the 2A and 2B stacks (STRU 15 and STRU 16) must be conducted within a reasonable period of time, such that the indurating furnace operating characteristics remain representative for the duration of the stack tests. The performance test shall be conducted at worst-case conditions defined at Minn. R. 7017.2005, subp. 8 or at the operating conditions described at Minn. R. 7017.2025, subp. 2, using EPA Reference Methods 201A and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 365 days prior to the performance test due date will not reset the test due date for future testing as required by this permit or within a Notice of Compliance letter. Testing conducted more than 60 days prior to the performance test due date satisfies this test due date requirement but will reset future performance test due dates based on the performance test date. [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(3)(netting) & Minn. R. 7007.3000]

6.26.7 Opacity : The Permittee shall conduct a performance test : Due before 10/01/2017 every 36 months to measure opacity of emissions from EQUI 47 (STRU 15 and STRU 16). The first test is due by the date specified and all subsequent tests are due by the end of each 36-month period following that date. The 2A and 2B stacks (STRU 15 and STRU 16) shall be tested simultaneously. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 9, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1]

6.26.8 Mercury : The Permittee shall conduct a performance test : Due before 10/12/2016 every 60 months to measure emissions from EQUI 47 (STRU 15 and STRU 16). The first test is due by the date specified


Requirement number Requirement and citation and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 29, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted on all stacks associated with EQUI 47 (STRU 15 and STRU 16) within a reasonable period of time, such that the furnace operating characteristics remain representative for the duration of the stack tests. The performance test shall comply with all MPCA stack testing requirements. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. This is a state-only requirement and is not enforceable by the U.S. Environmental Protection Agency (EPA) Administrator and citizens under the Clean Air Act. [Minn. R. 7017.2020, subp. 1, Minn. R. 7019.3050(E)]

6.26.9 The Permittee shall submit a notification of the date construction began : Due 30 calendar days after Date of Construction Start on the 12 natural-gas fired preheat burners for EQUI 47. Submit the name and number of the Subject Item and the date construction began. [Minn. R. 7007.0800, subp. 16(L)]

6.26.10 The Permittee shall submit a notification of the date construction began : Due 30 calendar days after Date of Construction Start on the replacement of the existing main kiln burners with low NOx burners for EQUI 47. Submit the name and number of the Subject Item and the date construction began. [Minn. R. 7007.0800, subp. 16(L)]

6.26.11 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date after completing the construction of the 12 natural-gas fired preheat burners for EQUI 47. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7005.0100, subp. 42a. [Minn. R. 7007.0800, subp. 16(L)]

6.26.12 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date after completing the replacement of the existing main kiln burners with low NOx burners for EQUI 47. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7005.0100, subp. 42a. [Minn. R. 7007.0800, subp. 16(L)]

EQUI 118 Coarse Ore Surge

6.27.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due before 06/30/2019 every 60 months to measure emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1]



6.27.2 Opacity : The Permittee shall conduct a performance test : Due before 06/30/2019 every 60 months to measure opacity of emissions. The first test is due by the date specified and all subsequent tests are due by the end of each 60-month period following that date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 9, or other method approved by MPCA in the performance test plan approval. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [Minn. R. 7017.2020, subp. 1]

EQUI 119 Third Stage Bins Conveyor






EQUI 120 Fourth Stage Trip/Bin/Convey













6.31.3 PM < 2.5 micron : The Permittee shall conduct a performance test : Due 180 calendar days after Initial


Requirement number Requirement and citation Startup Date of TREA 31 to measure emissions of PM < 2.5 micron to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 1.57 tons/yr (corresponding to 0.36 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]






6.33.1 Total Particulate Matter : The Permittee shall conduct a performance test : Due 180 calendar days


Requirement number Requirement and citation after Initial Startup Date of TREA 33 to measure emissions of total particulate matter to demonstrate compliance with the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 1.92 tons/yr (corresponding to 0.44 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]





6.34.2 PM < 10 micron : The Permittee shall conduct a performance test : Due 180 calendar days after Initial Startup Date of TREA 34 to measure emissions of PM < 10 micron to demonstrate compliance with


Requirement number Requirement and citation the maximum controlled emission rates that were used to avoid classification as a major modification under 40 CFR 52.21 for the project permitted in Permit Action 13700113-006. The performance test shall also be used to establish parametric operating limits for the new fabric filter. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 201A and 202, or other method approved by MPCA in the performance test plan approval. The controlled emission rate to verify is 5.04 tons/yr (corresponding to 1.15 lbs/hr at 8760 hours/yr). [Minn. R. 7017.2020, subp. 1, Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]


EQUI 142 Furnace 1 NOx CEMS

6.35.1 The Permittee shall conduct a cylinder gas audit : Due by the end of each calendar half-year, except that a CGA is not required during any calendar half year in which a RATA was performed. The initial CGA must be performed within 180 days following certification of the CEMS. The CGAs shall be conducted at least three months apart but no more than eight months apart. A CGA shall be conducted according to the procedures in 40 CFR pt. 60, Appendix F, Section 5.1.2. If the monitored emission unit was operated for less than 24 hours during the calendar half year, a CGA is not required for that calendar half year. [Minn. R. 7017.1170, subp. 4]

6.35.2 The Permittee shall conduct a relative accuracy test audit : Due by the end of each calendar year. A RATA is not required in any calendar year if a RATA conducted in the previous year demonstrated a relative accuracy value of less than 15 percent or if the associated emissions unit operated less than 48 hours during the calendar year. If the exception is used, the next RATA shall be conducted during the first half of the following calendar year. RATAs shall be conducted at least 3 months apart and according to 40 CFR pt. 60, Appendix F, Section 5.1.1. [Minn. R. 7017.1170, subp. 5]

EQUI 143 Furnace 1 SO2 CEMS





EQUI 145 Furnace 2A NOx CEMS



EQUI 146 Furnace 2A SO2 CEMS



EQUI 148 Furnace 2B NOx CEMS



EQUI 149 Furnace 2B SO2 CEMS

6.40.1 The Permittee shall conduct a cylinder gas audit : Due by the end of each calendar half-year, except that a CGA is not required during any calendar half year in which a RATA was performed. The initial CGA must be performed within 180 days following certification of the CEMS. The CGAs shall be conducted at least three months apart but no more than eight months apart. A CGA shall be conducted according to the procedures in 40 CFR pt. 60, Appendix F, Section 5.1.2. If the monitored


Requirement number Requirement and citation emission unit was operated for less than 24 hours during the calendar half year, a CGA is not required for that calendar half year. [Minn. R. 7017.1170, subp. 4]


EQUI 169 Line 1 Kiln Drive Emergency Engine

6.41.1 The Permittee shall submit an annual report : Due by March 31 of each year following permit issuance. The first annual report must cover the calendar year 2015 and must be submitted no later than March 31, 2016. Subsequent annual reports for each calendar year must be submitted no later than March 31 of the following calendar year. The report must contain the following information: 1. Company name and address where the engine is located. 2. Date of the report and beginning and ending dates of the reporting period. 3. Engine site rating and model year. 4. Latitude and longitude of the engine in decimal degrees reported to the fifth decimal place. 5. Hours operated, including the date, start time, and end time for engine operation, for the purposes specified in 40 CFR Section 60.4211(f)(2)(ii) and (iii). 6. Number of hours the engine is contractually obligated to be available for the purposes specified in 40 CFR Section 60.4211(f)(2)(ii) and (iii). 7. Hours spent for operation, including the date, start time, and end time for engine operation, for the purposes specified in 40 CFR Section 60.4211(f)(3)(i). The report must also identify the entity that dispatched the engine and the situation that necessitated the dispatch of the engine. The annual report must be submitted electronically using the 40 CFR pt. 60, subp. IIII specific reporting form in the Compliance and Emissions Data Reporting Interface (CEDRI) that is accessed through EPA's Central Data Exchange (CDX) (www.epa.gov/cdx). However, if the reporting form specific to 40 CFR pt. 60, subp. IIII is not available in CEDRI at the time that the report is due, the written report must be submitted to the Administrator at the appropriate address listed in 40 CFR Section 60.4. [40 CFR 60.4214(d), 40 CFR 63.6590(c), Minn. R. 7011.2305, Minn. R. 7011.8150]

EQUI 173 Fluxstone Railcar Summer Unloading (Bottom Dump to CV-001A)

6.42.1 Total Particulate Matter : The Permittee shall conduct an initial performance test : Due 60 calendar days after Date of Achieving Maximum Capacity at which the affected facilities will be operated but no later than 180 days after initial startup of the affected facilities to measure emissions. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 5 or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 60.675 and 40 CFR Section 60.8(a). [40 CFR 60.675(b), 40 CFR 60.8(a), Minn. R. 7011.3350, Minn. R. 7017.2020, subp. 1]

6.42.2 Total Particulate Matter : The Permittee shall submit a test frequency plan : Due 60 calendar days after Initial Performance Test Date for PM emissions. The plan shall specify a testing frequency based on the test data and MPCA guidance. Future performance tests based on 12-month, 36-month, or 60-month intervals, or as applicable, shall be required upon written approval of the MPCA. [Minn. R. 7017.2020, subp. 1]

EQUI 174 Fluxstone Summer Conveying (CV-001A to CV-002)

6.43.1 Total Particulate Matter : The Permittee shall conduct an initial performance test : Due 60 calendar days after Date of Achieving Maximum Capacity at which the affected facilities will be operated but no later than 180 days after initial startup of the affected facilities to measure emissions. The


Requirement number Requirement and citation performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 5 or 17, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 60.675 and 40 CFR Section 60.8(a). [40 CFR 60.675(b), 40 CFR 60.8(a), Minn. R. 7011.3350, Minn. R. 7017.2020, subp. 1]


EQUI 175 Fluxstone Winter Conveying (CV-001B to CV-002)



6.44.3 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date. For a combination of affected facilities in a production line that begin actual initial startup on the same day, a single notification of startup may be submitted by the Permittee to the Commissioner. The notification shall include a description of each affected facility, equipment manufacturer, and serial number of the equipment, if available. [40 CFR 60.676(i)(1), 40 CFR 60.7(a)(3), Minn. R. 7007.0800, subp. 16(L), Minn. R. 7011.3350, Minn. R. 7019.0100, subp. 1]

EQUI 184 Fluxstone Crusher (CV-005 to Roll Crusher to CV-006)



EQUI 185 Space Heater 1 (Fluxstone Storage Building)

6.46.1 The Permittee shall submit a notification of the date construction began : Due 30 calendar days after Date of Construction Start. Submit the name and number of the Subject Item and the date construction began. [Minn. R. 7007.0800, subp. 16(L)]



6.46.2 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7005.0100, subp. 42a. [Minn. R. 7007.0800, subp. 16(L)]









































6.59.2 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days


Requirement number Requirement and citation after Initial Startup Date. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7005.0100, subp. 42a. [Minn. R. 7007.0800, subp. 16(L)]



















FUGI 35 Fluxstone Railcar Winter Unloading (Railcar to Hopper)

6.66.1 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days


Requirement number Requirement and citation after Initial Startup Date. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7005.0100, subp. 42a. [Minn. R. 7007.0800, subp. 16(L)]

FUGI 36 Fluxstone Railcar Winter Unloading (Hopper to CV-001B)

6.67.1 Opacity : The Permittee shall conduct an initial performance test : Due 60 calendar days after Date of Achieving Maximum Capacity at which the affected facilities will be operated but no later than 180 days after initial startup of the affected facilities to measure opacity of emissions from building openings. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2025, subp. 2, using EPA Reference Method 9, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 60.675 and 40 CFR Section 60.11. [40 CFR 60.11, 40 CFR 60.675(c)(1), 40 CFR pt. 60, subp. OOO(Table 3), Minn. R. 7011.3350, Minn. R. 7017.2020, subp. 1]

6.67.2 Opacity : The Permittee shall conduct a performance test : Due after Initial Performance Test Date every 60 months to measure opacity of emissions from building openings. Testing is due by the end of each 60 month period following the initial performance test date. The performance test shall be conducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 9, or other method approved by MPCA in the performance test plan approval. The performance test shall be conducted by following the test methods and procedures in 40 CFR Section 60.675 and 40 CFR Section 60.11. Testing conducted during the 60 days prior to the performance test due date satisfies the performance test due date, and will not reset the test due date for future testing as required: 1) by this permit; 2) by the most recently approved Performance Test Frequency Plan; or 3) within a Notice of Compliance letter. Testing conducted more than two months prior to the performance test due date satisfies this test due date requirement and will reset the performance test due date. [40 CFR 60.11, 40 CFR 60.675(c)(1), 40 CFR pt. 60, subp. OOO(Table 3), Minn. R. 7011.3350, Minn. R. 7017.2020, subp. 1]

6.67.3 The Permittee shall submit a notification of date construction began : Due 30 calendar days after Date of Construction Start. Submit the name and number of the Subject Item and the date construction began. [Minn. R. 7007.0800, subp. 16(L)]

6.67.4 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date. For a combination of affected facilities in a production line that begin actual initial startup on the same day, a single notification of startup may be submitted by the Permittee to the Commissioner. The notification shall include a description of each affected facility, equipment manufacturer, and serial number of the equipment, if available. [40 CFR 60.676(i)(1), 40 CFR 60.7(a)(3), Minn. R. 7007.0800, subp. 16(L), Minn. R. 7011.3350, Minn. R. 7019.0100, subp. 1]

























6.75.1 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date of TREA 18. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7007.0500, subp. 42a. The Permittee shall include in the notification the actual date of initial startup of the Subject Item and the information required on the MPCA approved forms GI-02 and GI-05A for the new control equipment, associated emission unit(s), and stack/vent(s). The Permittee shall also specify in the notification the date on which TREA 82 was removed and propose any revised performance test groupings as a result of the control equipment change. [Minn. R. 7007.0800, subp. 16(L), Title I Condition: Avoid major modification under 40 CFR


Requirement number Requirement and citation 52.21(b)(2) and Minn. R. 7007.3000]


6.76.1 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date of TREA 19. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7007.0500, subp. 42a. The Permittee shall include in the notification the actual date of initial startup of the Subject Item and the information required on the MPCA approved forms GI-02 and GI-05A for the new control equipment, associated emission unit(s), and stack/vent(s). The Permittee shall also specify in the notification the date on which TREA 67 was removed and propose any revised performance test groupings as a result of the control equipment change. [Minn. R. 7007.0800, subp. 16(L), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]








6.80.1 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date of TREA 24. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7007.0500, subp. 42a. The Permittee shall include in the notification the actual date of initial startup of the Subject Item and the information required on the MPCA approved forms GI-02 and GI-05A for the new control equipment, associated emission unit(s), and stack/vent(s). The Permittee shall also specify in the notification the date on which TREA 48 was removed and propose any revised performance test groupings as a result of the control equipment


Requirement number Requirement and citation change. [Minn. R. 7007.0800, subp. 16(L), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]










6.85.1 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date of TREA 29. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7007.0500, subp. 42a. The Permittee shall include in the notification the actual date of initial startup of the Subject Item and the information required on the MPCA approved forms GI-02 and GI-05A for the new control equipment, associated emission unit(s), and stack/vent(s). The Permittee shall also specify in the notification the date on which TREA 40 was


Requirement number Requirement and citation removed and propose any revised performance test groupings as a result of the control equipment change. [Minn. R. 7007.0800, subp. 16(L), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]










6.90.1 The Permittee shall submit a notification of the actual date of initial startup : Due 15 calendar days after Initial Startup Date of TREA 34. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7007.0500, subp. 42a. The Permittee shall include in the notification the actual date of initial startup of the Subject Item and the information required on the MPCA approved forms GI-02 and GI-05A for the new control equipment, associated emission unit(s),


Requirement number Requirement and citation and stack/vent(s). The Permittee shall also specify in the notification the date on which TREA 37 was removed and propose any revised performance test groupings as a result of the control equipment change. [Minn. R. 7007.0800, subp. 16(L), Title I Condition: Avoid major modification under 40 CFR 52.21(b)(2) and Minn. R. 7007.3000]



TREA 92 Binder Unloading (Truck to Bin) Baghouse

6.92.1 The Permittee shall submit a notification of the date construction began: Due 30 calendar days after Date of Construction Start (or reconstruction). Submit the name and number of the Subject Item and the date construction began. The notification shall be submitted electronically on Form CS-02. [Minn. R. 7007.0800, subp. 16(L)]

6.92.2 The Permittee shall submit a notification of the actual date of initial startup: Due 15 calendar days after Initial Startup Date. Submit the name and number of the Subject Item and the date of startup. Startup is as defined in Minn. R. 7005.0100, subp. 42a. The notification shall be submitted electronically on Form CS-02. [Minn. R. 7007.0800, subp. 16(L)]


7. Appendices

Appendix A. Insignificant Activities and General Applicable Requirements The table below lists the insignificant activities that are currently at the Facility and their associated general applicable requirements.

Minn. R. Rule description of the activity General applicable requirement

Minn. R. 7007.1300, subp. 3(C)(1) Gasoline storage tanks with a combined total tankage capacity of not more than 10,000 gallons

United Taconite LLC - Fairlane Plant has a storage tank used for gasoline (10,000 gallons).

No applicable limit, design requirements

only.

(Minn. R. 7011.1505, subp. 3(B))

Minn. R. 7007.1300, subp. 3(D) Emissions from a laboratory, as defined in Minn. R. 7007.1300, subp. 3(D)

United Taconite LLC - Fairlane Plant has and utilizes a laboratory.

PM, variable depending on airflow Opacity <= 20% (Minn. R. 7011.0715)

Minn. R. 7007.1300, subp. 3(E) Brazing, soldering, torch-cutting, or welding equipment

United Taconite LLC - Fairlane Plant has and operates welding equipment.

PM, variable depending on airflow Opacity <= 20% (Minn. R. 7011.0715)

Minn. R. 7007.1300, subp. 3(F) Individual units with potential emissions less than 2000 lb/year of certain pollutants

United Taconite LLC - Fairlane Plant has a carpentry shop, a coal silo building, a coal day bin, two zinc pots, a paint booth equipped with four paint guns, a boiler for the Fairlane office, numerous space/make-up heaters fired by natural gas, propane, and/or fuel oil, and several material handling/transfer/storage operations. Each specific activity is identified in the subsequent tables included in Appendix A.

Requirement to take reasonable measures to prevent PM from becoming airborne (Minn. R. 7011.0150)

PM ≤ 0.6 lb/MMBtu (existing) PM ≤ 0.4 lb/MMBtu (new) SO2 ≤ 2.0 lb/MMBtu when burning fuel oil Opacity ≤ 20%, with exceptions (Minn. R. 7011. 0510/0515)

PM, variable depending on airflow SO2 ≤ 2.0 lb/MMBtu when burning fuel oil Opacity ≤ 20%, with exceptions (Minn. R. 7011.0610)

PM, variable depending on airflow Opacity ≤ 20% (Minn. R. 7011.0710/0715)


Minn. R. Rule description of the activity General applicable requirement

Minn. R. 7007.1300, subp. 4 Individual units with potential or actual emissions meeting the criteria in Minn. R. 7007.1300, subp. 4(A)-(D)

United Taconite LLC - Fairlane Plant has emergency generators, a sandblaster (in the plant shop), a storage tank used for fuel oil (1,000,000 gallons), a pellet loadout bin vent, a boiler for the general office, a boiler for the Line 2 concentrator in the repair bay, numerous space/make-up heaters fired by natural gas, propane, and/or fuel oil, and several material handling/transfer/storage operations. Each specific activity is identified in the subsequent tables included in Appendix A.

Requirement to take reasonable measures to prevent PM from becoming airborne (Minn. R. 7011.0150)

PM ≤ 0.6 lb/MMBtu (existing) PM ≤ 0.4 lb/MMBtu (new) SO2 ≤ 2.0 lb/MMBtu Opacity ≤ 20%, with exceptions (Minn. R. 7011. 0510/0515)

PM, variable depending on airflow SO2 ≤ 2.0 lb/MMBtu when burning fuel oil Opacity ≤ 20%, with exceptions (Minn. R. 7011.0610)

PM, variable depending on airflow Opacity ≤ 20% (Minn. R. 7011.0710/0715)

No applicable limit, design requirements

only.

(Minn. R. 7011.1505, subp. 3(C))

SO2 < 0.5 lb/MMBtu Opacity < 20% (Minn. R. 7011.2300)

The table below contains a detailed list of the insignificant activities that are currently at the Facility and the applicable portion of Minn. R. 7007.1300, subp. 3 under which the activities qualify as insignificant. The following table contains insignificant activities that are considered emission units and were previously assigned emission unit (EU) and stack/vent (SV) numbers. These designations do not correspond to any requirements listed within this permit and are included only for ease of identification of the individual emission sources. These sources will not be assigned parallel Tempo identification numbers (i.e., EQUI/STRU/FUGI) unless a future action results in the activities no longer qualifying as insignificant or would require the activity to be listed specifically within the permit for another reason.

SV EU Emission Unit Description Minn. R. Basis

Carpentry Shop (Plant Shop) Minn. R. 7007.1300, subp. 3(F)

Laboratory Minn. R. 7007.1300, subp. 3(D)

Welding Equipment Minn. R. 7007.1300, subp. 3(E)

Emergency Generators Minn. R. 7007.1300, subp. 4

Sandblaster (Plant Shop) Minn. R. 7007.1300, subp. 4

Storage Tank: 10,000 gal - Gasoline (Tank 15F) Minn. R. 7007.1300, subp. 3(C)(1)



Storage Tank: 1,000,000 gal - Fuel Oil (Tank 1120) Minn. R. 7007.1300, subp. 4

053 047 Coal Silo Building Minn. R. 7007.1300, subp. 3(F)

054 048 Coal Day Bin 1 Minn. R. 7007.1300, subp. 3(F)

105 049 General Office Boiler Minn. R. 7007.1300, subp. 4

106 050 Fairlane Office Boiler Minn. R. 7007.1300, subp. 3(F)

059 059 Zinc Pot #1 Minn. R. 7007.1300, subp. 3(F)

060 060 Zinc Pot #2 Minn. R. 7007.1300, subp. 3(F)

061 061 Paint Booth (4 Paint Guns) Minn. R. 7007.1300, subp. 3(F)

063 063 Pellet Loadout Bin 3 Vent Minn. R. 7007.1300, subp. 4

210 210 Space Heater (F.C. NW Corner) Minn. R. 7007.1300, subp. 4

211 211 Space Heater (F.C. South Wall) Minn. R. 7007.1300, subp. 4

212 212 Space Heater (F.C. by Freight Elevator) Minn. R. 7007.1300, subp. 4

213 213 Space Heater (F.C. East Wall) Minn. R. 7007.1300, subp. 4

214 214 Space Heater (F.C. SE Corner) Minn. R. 7007.1300, subp. 4

216 216 Space Heater (Transfer House, By MCC Room) Minn. R. 7007.1300, subp. 4

217 217 Space Heater (Transfer House, Center) Minn. R. 7007.1300, subp. 4

218 218 Space Heater (Transfer House, SE Corner) Minn. R. 7007.1300, subp. 4

219 219 Make-up Heater (Transfer House, West Wall) Minn. R. 7007.1300, subp. 4

220 220 Space Heater (Pellet Plant, Cooler Sump) Minn. R. 7007.1300, subp. 4

221 221 Space Heater (Pellet Plant, South Door) Minn. R. 7007.1300, subp. 4

223 223 Space Heater (Pellet Plant, Above CBSH-1) Minn. R. 7007.1300, subp. 4

224 224 Space Heater (Coal Transfer, Take-up area) Minn. R. 7007.1300, subp. 3(F)

225 225 Space Heater (Coal Transfer, Silo Grade) Minn. R. 7007.1300, subp. 4

226 226 Space Heater (Coal Transfer, Day Bin) Minn. R. 7007.1300, subp. 4

227 227 Make-up Heater (Unloading Pocket, Penthouse) Minn. R. 7007.1300, subp. 3(F)

228 228 Space Heater (Unloading Pocket, MCC Room) Minn. R. 7007.1300, subp. 3(F)

229 229 Space Heater (Unloading Pocket, Pan Feeder Floor) Minn. R. 7007.1300, subp. 3(F)

230 230 Space Heater (Reel House, Top Floor) Minn. R. 7007.1300, subp. 3(F)

231 231 Space Heater (Reel House, Grade) Minn. R. 7007.1300, subp. 3(F)

232 232 Space Heater (Fines Crusher, South Door) Minn. R. 7007.1300, subp. 3(F)

233 233 Make-up Heater (Fines Crusher, SW Corner) Minn. R. 7007.1300, subp. 3(F)

234 234 Space Heater (Fines Crusher, SW Corner) Minn. R. 7007.1300, subp. 3(F)

235 235 Space Heater (Fines Crusher, South Wall) Minn. R. 7007.1300, subp. 3(F)

236 236 Make-up Heater (Fines Crusher, NW Corner) Minn. R. 7007.1300, subp. 3(F)

237 237 Space Heater (Fines Crusher, #2 Belt Elev) Minn. R. 7007.1300, subp. 3(F)

238 238 Space Heater (Fines Crusher, #1 Head Pulley) Minn. R. 7007.1300, subp. 3(F)

239 239 Space Heater (Fines Crusher, Tunnel Feed) Minn. R. 7007.1300, subp. 3(F)

240 240 Make-up Heater (Fines Crusher, Office Area) Minn. R. 7007.1300, subp. 3(F)

241 241 Space Heater (Fines Crusher, South MCC) Minn. R. 7007.1300, subp. 3(F)



242 242 Space Heater (Fines Crusher, #7 Conv) Minn. R. 7007.1300, subp. 3(F)

243 243 Space Heater (Coarse Ore Surge, South Wall) Minn. R. 7007.1300, subp. 3(F)

244 244 Make-up Heater (Coarse Ore Surge, West End Tunnel) Minn. R. 7007.1300, subp. 3(F)

245 245 Make-up Heater (Coarse Ore Surge, East End) Minn. R. 7007.1300, subp. 3(F)

246 246 Space Heater (Transfer House, 5C/9C Conv) Minn. R. 7007.1300, subp. 3(F)

247 247 Space Heater (Transfer House, North End) Minn. R. 7007.1300, subp. 4

248 248 Make-up Heater (Transfer House, SE Corner) Minn. R. 7007.1300, subp. 3(F)

249 249 Space Heater (Transfer House, FO Surge MCC) Minn. R. 7007.1300, subp. 3(F)

250 250 Space Heater (Truck Shop, Steam Room) Minn. R. 7007.1300, subp. 3(F)

251 251 Space Heater (Truck Shop, Steam Jenny) Minn. R. 7007.1300, subp. 3(F)

252 252 Make-up Heater (Truck Shop, Maintenance) Minn. R. 7007.1300, subp. 3(F)

253 253 Space Heater (Maintenance Shops, Steam Jenny) Minn. R. 7007.1300, subp. 3(F)

254 254 Make-up Heater (Maintenance Shops, Make-ups) Minn. R. 7007.1300, subp. 3(F)

255 255 Space Heater (Rubber Shop, Shop) Minn. R. 7007.1300, subp. 3(F)

256 256 Space Heater (Rubber Shop, Shop) Minn. R. 7007.1300, subp. 3(F)

257 257 Space Heater (Line 1, Mexico, Service Tunnel) Minn. R. 7007.1300, subp. 3(F)

258 258 Space Heater (Line 1, Concentrator, West Door) Minn. R. 7007.1300, subp. 3(F)

259 259 Space Heater (Line 1, Concentrator, NW Corner) Minn. R. 7007.1300, subp. 3(F)

260 260 Space Heater (Line 1, Concentrator, L1 N Wall) Minn. R. 7007.1300, subp. 3(F)

261 261 Make-up Heater (Line 1, Concentrator, L1 Gallery) Minn. R. 7007.1300, subp. 3(F)

262 262 Space Heater (Line 1, Concentrator, L1 Hvolt MCC) Minn. R. 7007.1300, subp. 3(F)

263 263 Make-up Heater (Line 1, Concentrator, L2 Gallery) Minn. R. 7007.1300, subp. 3(F)


265 265 Make-up Heater (Line 1, Concentrator, N Wall Col 23) Minn. R. 7007.1300, subp. 3(F)

266 266 Space Heater (Line 1, Concentrator, L2 Basement) Minn. R. 7007.1300, subp. 3(F)

267 267 Space Heater (Line 1, Concentrator, L1 Basement) Minn. R. 7007.1300, subp. 3(F)

268 268 Space Heater (Line 1, Concentrator, Above H-29) Minn. R. 7007.1300, subp. 3(F)

269 269 Space Heater (Line 1, Concentrator, South Repair Door) Minn. R. 7007.1300, subp. 3(F)

270 270 Space Heater (Line 1, Concentrator, Above Elec Shop) Minn. R. 7007.1300, subp. 3(F)

271 271 Space Heater (Line 1, Concentrator, Electric Shop) Minn. R. 7007.1300, subp. 3(F)

272 272 Space Heater (Line 1, Concentrator, W Warehouse) Minn. R. 7007.1300, subp. 3(F)

273 273 Space Heater (Line 1, Concentrator, N Warehouse) Minn. R. 7007.1300, subp. 3(F)

274 274 Space Heater (Line 1, Compressor Room, NE Wall) Minn. R. 7007.1300, subp. 3(F)

275 275 Space Heater (Line 1, Compressor Room, NW Wall) Minn. R. 7007.1300, subp. 3(F)

276 276 Space Heater (Line 1, Plant Offices, Pipe corr for Lab) Minn. R. 7007.1300, subp. 3(F)

277 277 Make-up Heater (Line 1, Main Dry, Utility Room) Minn. R. 7007.1300, subp. 3(F)

278 278 Make-up Heater (Line 2, Mexico, East End) Minn. R. 7007.1300, subp. 3(F)






285 285 Space Heater (Line 2, Concentrator, N Wall Ball Bins) Minn. R. 7007.1300, subp. 3(F)

286 286 Space Heater (Line 2, Concentrator, NE Corner) Minn. R. 7007.1300, subp. 3(F)

287 287 Space Heater (Line 2, Concentrator, East Doors) Minn. R. 7007.1300, subp. 3(F)

289 289 Space Heater (Line 2, Concentrator, Above Tails Pumps) Minn. R. 7007.1300, subp. 3(F)

290 290 Space Heater (Line 2, Concentrator, L5 S Wall) Minn. R. 7007.1300, subp. 3(F)



293 293 Space Heater (Line 2, Concentrator, South Door) Minn. R. 7007.1300, subp. 3(F)

294 294 Space Heater (Line 2, Concentrator, Near South Door) Minn. R. 7007.1300, subp. 3(F)

295 295 Space Heater (Line 2, Tailings Pocket, West Grade) Minn. R. 7007.1300, subp. 3(F)

296 296 Space Heater (Line 2, Tailings Pocket, East Grade) Minn. R. 7007.1300, subp. 3(F)

297 297 Space Heater (Line 2, Tailings Pocket, Top Floor) Minn. R. 7007.1300, subp. 3(F)

298 298 Space Heater (Line 2, Main Dry, Roof) Minn. R. 7007.1300, subp. 3(F)

299 299 Space Heater (Line 2, Main Dry, Roof Dry Exp) Minn. R. 7007.1300, subp. 3(F)

300 300 Space Heater (Line 1, Plant, Col U-10) Minn. R. 7007.1300, subp. 3(F)

301 301 Space Heater (Line 1, Plant, Col U-9) Minn. R. 7007.1300, subp. 3(F)

302 302 Space Heater (Line 1, Plant, Col T-9) Minn. R. 7007.1300, subp. 3(F)

303 303 Space Heater (Line 1, Plant, Col M-9) Minn. R. 7007.1300, subp. 3(F)

304 304 Space Heater (Line 1, Plant, Bentonite Tracks) Minn. R. 7007.1300, subp. 3(F)

305 305 Space Heater (Line 1, Plant, Conc Loadout) Minn. R. 7007.1300, subp. 3(F)

306 306 Space Heater (Line 1, Plant, Col M-1a) Minn. R. 7007.1300, subp. 3(F)

307 307 Space Heater (Line 1, Plant, Col J-1a) Minn. R. 7007.1300, subp. 3(F)

308 308 Space Heater (Line 1, Plant, Col A-1a) Minn. R. 7007.1300, subp. 3(F)

309 309 Space Heater (Line 1, Plant, Col A-3) Minn. R. 7007.1300, subp. 3(F)

310 310 Space Heater (Line 1, Plant, Col B-7) Minn. R. 7007.1300, subp. 3(F)

311 311 Space Heater (Line 1, Plant, Col A-9) Minn. R. 7007.1300, subp. 3(F)

312 312 Space Heater (Line 1, Plant, Col F-10) Minn. R. 7007.1300, subp. 3(F)

313 313 Space Heater (Line 1, Plant, Col F-14) Minn. R. 7007.1300, subp. 3(F)

314 314 Space Heater (Line 1, Plant, AT Filter Control) Minn. R. 7007.1300, subp. 3(F)

315 315 Space Heater (Line 1, Plant, Col A1-14) Minn. R. 7007.1300, subp. 3(F)




319 319 Space Heater (Line 1, Plant, Col B1-19 Filters) Minn. R. 7007.1300, subp. 3(F)

320 320 Space Heater (Line 1, Plant, Col B1-19 Grade) Minn. R. 7007.1300, subp. 3(F)

321 321 Space Heater (Line 1, Plant, Col B1-20 Grade) Minn. R. 7007.1300, subp. 3(F)

323 323 Space Heater (Line 1, Plant, Grade SE Corner) Minn. R. 7007.1300, subp. 3(F)

324 324 Space Heater (Line 1, Plant, Col F-24 Grade) Minn. R. 7007.1300, subp. 3(F)



325 325 Space Heater (Line 1, Plant, Col F-24 Firing Fl) Minn. R. 7007.1300, subp. 3(F)

326 326 Space Heater (Line 1, Plant, Col M1-24 Grade) Minn. R. 7007.1300, subp. 3(F)

327 327 Space Heater (Line 1, Plant, Col T-24 Firing Fl) Minn. R. 7007.1300, subp. 3(F)

328 328 Space Heater (Line 1, Plant, Col T-22 Grade) Minn. R. 7007.1300, subp. 3(F)

329 329 Space Heater (Line 1, Plant, Conc #31) Minn. R. 7007.1300, subp. 3(F)

330 330 Space Heater (Line 1, Plant, Below #8 Thk) Minn. R. 7007.1300, subp. 3(F)

331 331 Space Heater (Line 1, Plant, Below #8 Thk) Minn. R. 7007.1300, subp. 3(F)

332 332 Space Heater (Line 1, Plant, Feed End MCC) Minn. R. 7007.1300, subp. 3(F)

333 333 Space Heater (Line 1, Plant, Discharge End MCC) Minn. R. 7007.1300, subp. 3(F)

334 334 Space Heater (Line 1, Plant, Inside Conc Reclaim) Minn. R. 7007.1300, subp. 3(F)

335 335 Space Heater (Line 2, Plant, N of Conv 21A Head) Minn. R. 7007.1300, subp. 3(F)

336 336 Space Heater (Line 2, Plant, Firing Fl) Minn. R. 7007.1300, subp. 3(F)

337 337 Space Heater (Line 2, Plant, S of Frt Elev) Minn. R. 7007.1300, subp. 3(F)

338 338 Space Heater (Line 2, Plant, N of Frt Elev) Minn. R. 7007.1300, subp. 3(F)

339 339 Space Heater (Line 2, Plant, Col N'-18) Minn. R. 7007.1300, subp. 3(F)



342 342 Space Heater (Line 2, Plant, Col R'b Grate Fl) Minn. R. 7007.1300, subp. 3(F)

343 343 Space Heater (Line 2, Plant, Col T'-10) Minn. R. 7007.1300, subp. 3(F)

344 344 Space Heater (Line 2, Plant, W Wall Tin Shop) Minn. R. 7007.1300, subp. 3(F)

345 345 Space Heater (Line 2, Plant, Tin Shop Doors) Minn. R. 7007.1300, subp. 3(F)

346 346 Space Heater (Line 2, Plant, Col M'-1a Bin Feed) Minn. R. 7007.1300, subp. 3(F)

347 347 Space Heater (Line 2, Plant, M' above Tin Shop) Minn. R. 7007.1300, subp. 3(F)

348 348 Space Heater (Line 2, Plant, E above Tin Shop) Minn. R. 7007.1300, subp. 3(F)

349 349 Space Heater (Line 2, Plant, Col G'-1a Balling) Minn. R. 7007.1300, subp. 3(F)

350 350 Make-up Heater (Line 2, Pellet Loadout, Inside Turnover) Minn. R. 7007.1300, subp. 3(F)

351 351 Make-up Heater (L.2, Pellet Loadout, N Wall Turnover) Minn. R. 7007.1300, subp. 3(F)

352 352 Make-up Heater (Line 2, Pellet Loadout, S Wall Turnover) Minn. R. 7007.1300, subp. 3(F)

353 353 Space Heater (Line 2, Pellet Loadout, S End T/ Bins) Minn. R. 7007.1300, subp. 3(F)

354 354 Space Heater (Line 2, Pellet Loadout, N End T/ Bins) Minn. R. 7007.1300, subp. 3(F)

355 355 Make-up Heater (Line 2, Pellet Loadout, Above N End) Minn. R. 7007.1300, subp. 3(F)

356 356 Space Heater (Line 2, Coal Handling, Unloading) Minn. R. 7007.1300, subp. 3(F)

357 357 Space Heater (Line 2, Coal Handling, Unloading Pit) Minn. R. 7007.1300, subp. 3(F)

358 358 Space Heater (Line 2, Coal Handling, T/ Silo) Minn. R. 7007.1300, subp. 4

359 359 Space Heater (Line 2, Coal Handling, N of Silo Grade) Minn. R. 7007.1300, subp. 3(F)

360 360 Space Heater (Line 2, Fuel Handling, Pump House) Minn. R. 7007.1300, subp. 4

361 361 Space Heater (Fines Crusher, Temporary) Minn. R. 7007.1300, subp. 3(F)

362 362 Space Heater (Fines Crusher, Temporary) Minn. R. 7007.1300, subp. 3(F)

363 363 Space Heater (Pellet Loadout, Temporary) Minn. R. 7007.1300, subp. 3(F)



364 364 Space Heater (Pellet Loadout, Temporary) Minn. R. 7007.1300, subp. 3(F)

365 365 Boiler (Line 2, Concentrator, Repair Bay) Minn. R. 7007.1300, subp. 4

288 288 Space Heater (Line 2, Concentrator, Tails Pumps) Minn. R. 7007.1300, subp. 3(F)

The table below contains a detailed list of the insignificant activities that are currently at the Facility and the applicable portion of Minn. R. 7007.1300, subp. 3 under which the activities qualify as insignificant. The following table contains insignificant activities that are considered fugitive sources and were previously assigned fugitive source (FS) numbers. These designations do not correspond to any requirements listed within this permit and are included only for ease of identification of the individual fugitive sources. These sources will not be assigned parallel Tempo identification numbers (i.e., EQUI/STRU/FUGI) unless a future action results in the activities no longer qualifying as insignificant or would require the activity to be listed specifically within the permit for another reason.

FS Fugitive Source Description Basis

003 Wind Erosion - Pellet Stockpiles Minn. R. 7007.1300, subp. 3(F)

007 Coal Unload Minn. R. 7007.1300, subp. 3(F)

008 Wind Erosion - Coal Stockpile Minn. R. 7007.1300, subp. 3(F)

009 Concentrate Reclaim - pocket to pile 7 (FEL) Minn. R. 7007.1300, subp. 3(F)

010 Pellet Reclaim - pile 2 to grizzly (FEL) Minn. R. 7007.1300, subp. 3(F)

011 Chips/Sinter Reclaim - pile 9 to screen (FEL) Minn. R. 7007.1300, subp. 3(F)

013 Pellet Reclaim – screening Minn. R. 7007.1300, subp. 3(F)

015 Wind Erosion - Coarse Ore Surge Stockpile Minn. R. 7007.1300, subp. 3(F)

016 Concentrate Reclaim - pile 7 to hopper (FEL) Minn. R. 7007.1300, subp. 3(F)

017 Concentrate Reclaim - hopper to screen Minn. R. 7007.1300, subp. 3(F)

018 Concentrate Reclaim – screening Minn. R. 7007.1300, subp. 3(F)

019 Contam. Conc. Reclaim - pile to pile (FEL) Minn. R. 7007.1300, subp. 3(F)

020 Contam. Conc. Reclaim - pile to hopper (FEL) Minn. R. 7007.1300, subp. 3(F)

021 Contam. Conc. Reclaim – screening Minn. R. 7007.1300, subp. 3(F)

022 Sinter Reclaim - pile 10 to 6 (FEL) Minn. R. 7007.1300, subp. 3(F)

023 Sinter Reclaim - pile 6 to railcar (FEL) Minn. R. 7007.1300, subp. 3(F)

025 Pellet Reclaim - screen to sinter pile 9 (FEL) Minn. R. 7007.1300, subp. 3(F)

026 Concentrate Reclaim - conveyor transfers Minn. R. 7007.1300, subp. 3(F)

027 Line 1 chunks transfer (pan feeder to pocket) Minn. R. 7007.1300, subp. 3(F)

028 Line 2 chunks transfer (pan feeder to pocket) Minn. R. 7007.1300, subp. 3(F)

Temporary Conveyor discharge transfer Minn. R. 7007.1300, subp. 4


Appendix B. Visible Emission Checklists This appendix contains examples of daily visible emission checklists for emissions from stacks and fugitive sources. The checklists include various areas of the facility and a listing of the fugitive sources and/or emission units and stacks that make up each area. Example checklists included in this appendix are as follows:

Fairlane Plant Daily Fugitive Emission Inspection

Fines Crusher Daily Stack Emissions Inspection

Concentrator Daily Stack Emissions Inspection

Pellet Plant Daily Stack Emissions Inspection


Fairlane Plant Daily Fugitive Emissions Inspection Visual inspection of fugitive dust areas is to be recorded on day shift Saturday through Friday. Record an “OK” if fugitive dust is not visible. Record an “RA” if fugitive dust is visible and requires attention. If “RA” is recorded, note the corrective action taken in the comments area. If unable to correct, note the reason why

and notify the Environmental Engineer. Record the temperature, wind direction and speed, weather conditions, date, time and initial each daily inspection. At the end of each week, send completed inspection form to the Environmental Engineer to file.

FS FUGI Service Area Sat Sun Mon Tue Wed Thu Fri

001 19 Haul road to Basin 1

001 19 Haul road to Basin 2

001 19 Basin 1 dike and road

001 19 Basin 2 dike and road

002 24 Basin 1 beach

002 24 Basin 2 beach

004 25 Concentrate reclaim area

005 1 Coarse ore surge pile

012 18 Service roads

014 17 Pellet reclaim area

024 26 Pellet reclaim area

029 23 Fine ore surge F9 belt to F10

030 9 Fine ore surge 10 belt to pile

031 6 21 belt to 21B belt

032 15 Pellet loadout north conveyor

033 20 Pellet loadout railcar loading

Temperature

Wind direction & speed

Weather conditions code*

Year ___________ Date >>

Time

Initials

* Weather conditions codes: S-sunny; C-cloudy; P-partly cloudy; R-rain; Sn-snow; F-fog. Corrective Actions/Comments: ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ____________________________________________________________________________________

Date ___/___/___ Employee _______________________ # __________


Fines Crusher Daily Stack Emissions Inspection Visual inspection of each stack is to be recorded on day shift Saturday through Friday. Note that fabric filters (baghouses) that are equipped with MPCA-approved bag leak detection systems are not subject to daily visible emission inspections. Record “NA” if equipment does not require visual inspection because the fabric filter is equipped with an MPCA-

approved bag leak detection system. Record “OK” if equipment does not require attention. Record “RA” if equipment requires attention to reduce visible emissions from the stack. Record actions taken to remedy problems that require attention (“RA” items). Record “Moist” if moisture plume limits visible emissions observations. If the unit is down for more than one hour and the service area is active, notify the Environmental Engineer with the

following information: Unit number, time it went down, why it went down, and when it is expected to be operating again.

At the end of each week, send completed inspection form to Environmental Engineer to file. EU EQUI CE TREA SV STRU Sys # Service Area Sat Sun Mon Tue Wed Thu Fri

001 117 004 85 007 49 1 Crude ore unloading

002 9 002 86 008 48 10A Crude ore unloading

002 9 005 84 009 47 10B Crude ore unloading

004 118 006 83 010 46 26 Coarse ore surge

005 11 007 or 076 82 or 18 011 45 11 1C crusher

006 12 008 or 077 67 or 19 012 58 12 2C crusher

007 13 009 or 078 66 or 20 013 44 13 3C crusher

008 14 010 or 079 65 or 21 014 43 14 4C crusher

009 15 080 22 015 42 15 5C crusher

010 119 001 or 086 87 or 27 016 41 21 3rd stage bins

011 17 012 or 081 46 or 23 017 40 2 1F crusher

012 18 013 or 082 47 or 35 018 39 3 2F crusher

013 19 014 or 083 48 or 24 019 38 4 3F crusher

014 20 015 or 084 49 or 25 020 37 5 4F crusher

015 21 016 or 085 50 or 26 021 57 5A 5F crusher

016 22 072 14 022 36 17 6F crusher

017 23 073 15 023 35 18 7F crusher

018 24 074 16 024 34 19 8F crusher

019 120 024 or 087 69 or 28 025 33 20 4th stage bins

020 26 069 or 088 40 or 29 026 32 16 Transfer house (North)

022 27 075 17 028 31 22 Transfer house (South)

Year______ Date >>

Time

Initials

Record corrective actions or comments for each “RA”. Also record pressure drop and/or water pressure/flow for each unit that moisture plume interferes with the observation. ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ____________________________________________________________________________________ Date ___/___/___ Employee _______________________ # __________


Concentrator Daily Stack Emissions Inspection Visual inspection of each stack is to be recorded on day shift Saturday through Friday. Note that fabric filters (baghouses) that are equipped with MPCA-approved bag leak detection systems are not subject to daily visible emission inspections. Record “NA” if equipment does not require visual inspection because the fabric filter is equipped with an MPCA-



At the end of each week, send completed inspection form to Environmental Engineer to file.

EU EQUI CE TREA SV STRU Sys # Service Area Sat Sun Mon Tue Wed Thu Fri

023 121 027 or 089 68 or 30 029 30 7 #1 rod mill feed





Year____ Date >>

Time

Initials

Record corrective actions or comments for each “RA”. Also record pressure drop and/or water pressure/flow for each unit that moisture plume interferes with the observation. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Date ___/___/___ Employee _______________________ # __________


Pellet Plant Daily Stack Emissions Inspection Visual inspection of each stack is to be recorded on day shift Saturday through Friday. Note that fabric filters (baghouses) that are equipped with MPCA-approved bag leak detection systems are not subject to daily visible emission inspections. Record “NA” if equipment does not require visual inspection because the fabric filter is equipped with an MPCA-



At the end of each week, send completed inspection form to Environmental Engineer to file.

EU EQUI CE TREA SV STRU Sys # Service Area Sat Sun Mon Tue Wed Thu Fri

029 34 052 71 035 25 Line 1 Na2CO3 & Binder

030 35 043 75 036 24 Line 2 bentonite bins

031 126 044 52 037 23 Line 2 bentonite addition

033 127 045 53 039 22 Line 2 grate feed

034 128 046 54 040 21 Line 2 grate discharge

035 129 047 55 041 20 Line 2 cooler discharge

036 41 -- -- 042 19 Line 2 cooler exhaust

037 130 053 56 043 18 Line 1 grate feed

038 131 054 57 044 17 Line 1 grate discharge


040 45 056 91 046 53 Line 1 induration

041 46 -- -- 047 52 Line 1 cooler exhaust

042 47 050 89 048 16 East line 2 induration

042 47 049 90 049 15 West line 2 induration

035 129 033 78 050 14 L2 cooler dischg/v. feeder

046 -- 034 -- 052 -- Line 2 pellet loadout

047 -- -- -- 053 -- Coal silo building

048 -- -- -- 054 -- Coal day bin

057 53 041 77 057 13 Binder day bin air relief

058 133 042 76 058 12 Binder addition


Year_________ Date >>

Time

Initials

Record corrective actions or comments for each “RA”. Also record pressure drop and/or water pressure/flow for each unit that moisture plume interferes with the observation. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Date ___/___/___ Employee _______________________ # __________


Appendix C. Inapplicable Requirements This appendix contains a listing of inapplicable requirements for the operations performed at the facility. The inapplicable requirements are as follows:

1. 40 CFR pt. 60, subp. D “Standards of Performance for Fossil-Fuel-Fired Steam Generators for Which Construction Is Commenced After August 17, 1971”

2. 40 CFR pt. 60, subp. Da “Standards of Performance for Electric Utility Steam Generating Units for Which Construction Is Commenced After September 18, 1978”

3. 40 CFR pt. 60, subp. Db “Standards of Performance for Industrial-Commercial-Institutional Steam Generating Units”

4. 40 CFR pt. 60, subp. Dc “Standards of Performance for Small Industrial-Commercial-Institutional Steam Generating Units”

5. 40 CFR pt. 60, subp. K “Standards of Performance for Storage Vessels for Petroleum Liquids for Which Construction, Reconstruction, or Modification Commenced After June 11, 1973, and Prior to May 19, 1978”

6. 40 CFR pt. 60, subp. Ka “Standards of Performance for Storage Vessels for Petroleum Liquids for Which Construction, Reconstruction, or Modification Commenced After May 18, 1978, and Prior to July 23, 1984”

7. 40 CFR pt. 60, subp. Kb “Standards of Performance for Volatile Organic Liquid Storage Vessels (Including Petroleum Liquid Storage Vessels) for Which Construction, Reconstruction, or Modification Commenced After July 23, 1984”


Appendix D. Determining Sulfur Acid Mist Emissions at EQUI 45 and EQUI 47 Using Sulfur Dioxide Continuous Emission Monitoring (CEM) Data This appendix contains the calculation method for determining sulfur acid mist emissions from the Line 1 and Line 2 Indurating Furnaces (EQUI 45 and EQUI 47) for comparison to each unit’s 30-day rolling sum emission limit. The methodology described is described below.

The Line 1 Indurating Furnace (EQUI 45) and the Line 2 Indurating Furnace (EQUI 47) each have 30-day rolling limits on emissions of sulfur acid mist (SAM). United Taconite will determine SAM emissions from sulfur dioxide (SO2) emissions data collected by continuous emissions monitors (CEMs). The SO2 emissions data will be multiplied by the ratio of SAM to SO2 determined by performance testing. Because the ratio of SAM to SO2 may vary by fuel type, separate emission factors for each fuel type will be determined by performance testing. The following formula will be used to determine daily SAM emissions from the previous day:

𝐷𝑎𝑖𝑙𝑦 𝑆𝐴𝑀 𝐸𝑚𝑖𝑠𝑠𝑖𝑜𝑛𝑠 𝐷𝑎𝑖𝑙𝑦 𝑆𝑂2 𝐶𝐸𝑀 ∗𝑆𝐴𝑀𝑆𝑂2

∗𝐻𝑒𝑎𝑡 𝑖𝑛𝑝𝑢𝑡

𝐻𝑒𝑎𝑡 𝑖𝑛𝑝𝑢𝑡

Where

i=fuel type (i.e., 1=natural gas, 2=coal, 3=biomass); Daily SO2(CEM)=mass emission rate of SO2 measured by the CEM during the day (sum of all operating hours in a

calendar day); and (SO2/SAM)j=the mass ratio of SO2 to SAM for fuel i determined by performance testing when burning 100% fuel

i Heat inputj=the daily heat input for fuel i (the product of the amount of fuel consumed and the heat content of

that fuel; for coal, it would be [MMBtu/ton coal]*[ton coal/day]) Heat inputtotal=the daily total heat input from all fuels (combined)

Also on a daily basis, SAM emissions for the previous 30 days will be summed to determine the 30-day rolling sum. The heat input (BTU/lb) for solid fuels is determined by collecting daily grab samples and analysis the aggregate sample on a weekly basis. Since this value is available only after the fuel has been consumed, the company will estimate the heat input from solid fuels for the previous day from the quantity of fuel burned (measured daily) and the heat content of the fuel determined by fuel analysis for the previous week. The daily values and weekly values will be updated after the heat input for week’s fuel has been analyzed.


Appendix E. Fugitive Dust Control Plan This appendix contains the fugitive dust control plan required for and developed by United Taconite.

UNITED TACONITE LLC - FAIRLANE PLANT

FUGITIVE DUST CONTROL PLAN (Revision 12/19/16)

1. Objective: United Taconite LLC (United) has developed and implemented a Fugitive Dust Control Plan (Plan) for the

purpose of minimizing fugitive dust emissions from the sources identified below at the Fairlane Plant. The Plan documents previously implemented initiatives and satisfies Level III-A requirements for achieving 90% control of fugitive emissions from unpaved roads as outlined by MPCA guidance documents.

The Plan will be reviewed annually to evaluate its effectiveness in minimizing fugitive dust. The review will include consideration and, as applicable, incorporation of any new fugitive dust control technologies or practices into the Plan. An annual update will be provided to the MPCA. This update will include the following information: the effectiveness evaluation of the Plan and a statement on the evaluation of new technologies and practices, including discussion on the applicability of each technology or practice at the facility.

2. Definitions: Fugitive Emissions (Fugitive Dust) – Air emissions which cannot reasonably pass through a stack, chimney, vent, or other equivalent opening.

3. Forms Used:

Daily Visible Emissions Inspection Checklist

Fugitive Emissions Inspection Log

Mulching Activities Tracking Sheet

Water Truck Application Log 4. Summary of Fairlane Fugitive Emission Sources, Controls, and Recordkeeping

FS # FUGI # Process Description

Primary Control Operating Control

Contingency Control

Records

001 19 Haul Roads Water Truck Daily visible emission (VE) checks; Grading

Chemical suppressant (MgCl2, CaCl2, etc.)

Daily VE checks; Water truck operating hours and batches of water applied; Chemical application

002 24 Beaches Pond Level; Mulch

Daily visible emission (VE) checks; Water Slurry

Vegetation; Chemical suppressant (MgCl2, CaCl2, etc.)

Daily VE checks; Mulch application

004 25 Concentrate Pile Daily visible Daily VE checks;


emission (VE) checks; 9%+ Moisture

Operating hours

005 1 Coarse Ore Storage

Water spray; Chemical

Daily visible emission (VE) checks

Shutdown due to meteorological conditions

Daily VE checks; Operating hours

012 18 Service Roads Water Truck Daily visible emission (VE) checks; Grading


Daily VE checks; Water truck operating hours and batches of water applied; Chemical application

024 26 Pellet Reclaim (Pocket to Pile 2)

Chemical Daily visible emission (VE) checks


029 23 FOS 9F to 10F Water Spray Indoors; Daily visible emission (VE) checks

Daily VE checks; Production records

030 9 FOS 10F to Surge Indoors; Daily visible emission (VE) checks


031 6 Pellet Plant 21 to 21B Conveyors

Water Spray (1% Pellet Moisture)

Indoors; Daily visible emission (VE) checks


032 15 Pellet Load Out N orth Conveyor

Water Spray; Chemical

Indoors; Daily visible emission (VE) checks


033 20 Pellet Load Out RR Car Loading

Water Spray Indoors; Daily visible emission (VE) checks


034 - 040

3, 4, 11, 16, 21-22,

27

Concentrate reclaim

Daily visible emission (VE) checks; 9%+ Moisture



041 - 048

5, 7-8, 10, 13, 28-30

Pellet Reclaim Areas

Water Spray; Chemical

Daily visible emission (VE) checks


049-050

31-32 Concentrate oversize screen/pile

Daily visible emission (VE) checks; 9%+ Moisture


051 33 Pellet Plant 21B to 22 N/S conveyors

Chemical Indoors; Daily visible emission (VE) checks


052 34 Unpaved roads - solid fuel trucks

Water truck; Natural moisture control during winter (snow cover)

Daily visible emission (VE) checks during active concentrate hauling operations; Grading


Daily VE checks (during active hauling); Water truck operating hours and batches of water applied; Chemical application


053 35 Fluxstone railcar winter unloading (railcar to hopper)

Physical characteristics (material size, moisture, etc.)

Daily visible emission (VE) checks during active unloading operations; Drop distance


Daily VE checks (during active unloading); Operating hours

054 36 Fluxstone railcar winter unloading (hopper to CV-001B)

Physical characteristics (material size, moisture, etc.)

TBD during active unloading operations; Drop distance


TBD (during active unloading); Operating hours

056 37 Concentrate Hauling Roads (unpaved)

Water truck; Natural moisture control during winter (snow cover)

Daily visible emissions (VE) checks during active concentrate hauling operations; Grading


Water truck operating hours and batches of water applied; Daily VE checks (during active hauling); Chemical application

057 38 Concentrate Hauling Roads (paved)

Mechanical Cleaning (sweeping or vacuuming); natural moisture control during winter (snow cover)

Daily visible emissions (VE) checks during active concentrate hauling operations

Water Truck Mechanical cleaning operating hours; Daily VE checks (during active hauling); Water truck operating hours and batches of water applied

5. Dust Suppressant Application Description: The following control methods are used at the Fairlane Plant to minimize fugitive dust emissions.

Unpaved Road Watering – United operates two water trucks during non-freezing conditions as the primary control method for unpaved roads. The water trucks can load water from either the process return water systems located at Hammer Lake or at Tailings Basin 2. The large water truck holds 20,000 gallons of water and sprays a path approximately 75 feet wide from rear-mounted nozzles. The smaller water truck holds 5,500 gallons of water and sprays a path approximately 20 feet wide from rear and side nozzles. This water truck also has a remote controlled water monitor and hose reel/manual spray to spot apply water as needed to otherwise unreachable areas such as slopes, steep ramps, material piles, etc. Water truck operators record the number of water loads applied on haul roads for each shift they operate, as well as designate areas that water was applied on the Water Truck Application form. These forms are submitted to the Operations Supervisor for review. This information is compiled on at least a monthly basis and is maintained on-site. In addition, water truck operating hours are maintained in Ellipse. Water truck utilization varies based upon meteorological conditions. Weather conditions such as temperature, humidity, sky conditions (sunny vs. cloudy), wind, etc. are monitored closely by operations personnel. Daily watering activities are determined by the supervisor’s assessment of the weather conditions or in response to deficiencies noted during visible emission inspections. Chemical application to roads (magnesium chloride, calcium chloride, etc.) – Chemicals, such as magnesium chloride, are applied to haul roads and service roads as added protection against fugitive emissions, especially


during freezing conditions. These chemicals are applied by vendors using a tank truck and spray system. Records of application date and location are kept. Concentrate Hauling Roads (paved) – United sweeps or vacuums paved roadways as needed to control potential fugitive dust emissions while concentrate is actively being hauled or when fugitive conditions are observed. Water trucks may also be used during non-freezing months to control fugitive dust as determined by operating personnel. The implementation and adequacy of primary or secondary controls is documented during the daily visible emissions (VE) inspections. VE inspections are conducted on this source only when concentrate is actively being hauled. Vegetation – The tailings basins are active disposal areas and as such their surface is ever-changing. Exposed areas are created when fine tailings slurry spigotting points are repositioned. Beach areas of the active tailings basin are mulched (see mulch description below) and/or seeded with temporary vegetation (such as rye grass) as soon as uncovered areas can be safely accessed. A vegetation assessment is completed in late summer by the contractor or United to document the success of areas seeded during that cropping year. The assessment may include, but is not limited to, photos, acres seeded, and qualitative observations of vegetation growth. The slopes and top of inactive basins are reclaimed with permanent vegetation (such as grasses or trees). United has a successful reclamation program to promote vegetation growth and has entered into a partnership with a local dairy farmer to harvest vegetation from Tailings Basin 1 for livestock feed and for mulch that is applied on its active basin beaches. Records of the vegetation activities are maintained. Mulch – Mulch is used to provide cover over fine tailings, such as beach areas of the active tailings basin. The most common mulch materials are hay and straw, which are harvested from Tailings Basin 1 or obtained from a local farmer. Alternatives such as paper mill residue or composting residue have been utilized in the past, but mulch application is the current preferred method for fugitive emissions control on exposed beach areas based upon ease of application and availability of materials. Mulch is applied via a hay buster and is anchored into the surface by dragging disks over the freshly applied mulch. Mulching of fine tailings beach areas occurs once uncovered areas can be safely accessed. Application dates, number of bales applied, and estimated number of acres covered are provided by the mulching contractor. The contractor also delivers routine assessments of previously mulched areas and provides recommendations on areas requiring reapplication. Monthly, a map is provided to the mulching contractor by the Tailings Basin Engineer or Supervisor, illustrating the previous month’s spigotting locations. This map is used by the contractor to track and communicate mulching activities. Beginning in 2008, United experimented with a low pressure, tracked snowmobile trail groomer to apply mulch to beach areas that were still wet and otherwise unreachable via traditional tractor application. The trial was successful, and United now utilizes both the tractor and snowmobile trail groomer to maximize exposed beach mulch coverage. Records of mulching activities are maintained. Chemical dust suppressant addition system – A chemical dust suppressant is used on the final pellet product to reduce generation of fugitive emissions while handling the pellets. United will continue to experiment with alternative chemicals and application methods to assure the best system is utilized for this process. Chemical


usage records are kept for this system. A chemical dust suppressant is used at FS005 (coarse ore surge) during freezing months. Water sprays – Water sprays are used to apply water to some material handling operations during non-freezing months such as FS005, FS041 through FS048, FS029, FS031, FS032, and FS033.

6. Operating Controls and Contingency Controls: The following operating controls and contingency controls are used to help minimize fugitive emissions and prevent them from leaving United property.

Grading roads – Roads are maintained with a road grader on a regular basis to assure a safe driving surface. In doing this maintenance, the road surface is scarified (loosened) so it can better absorb and retain water. Grader operating hours are maintained in Ellipse.

Fine tailings water slurry – Fine tailings are transported to the tailings basin as a water slurry. This wet operation helps minimize fugitive emissions from the tailings basin. Repositioning of fine tailings deposition

points are minimized as practicable.

Water pond elevation – The water from the fine tailings slurry, along with precipitation, is collected in the tailings basin and recycled back into the process. The elevation of the tailings basin pond is maintained so that exposed beach areas are minimized and as water is available. Beginning in 2009, tailings slurry pipe and pumping capabilities were improved so as to allow for better beach construction and maintenance of a centralized water pond. This improvement minimized the formation of excessively large beach areas. Concentrate % moisture – The moisture content of concentrate that is stored outdoors is greater than 9%. This high moisture content precludes fugitive emission generation from the very fine particles of iron ore concentrate. Shut down coarse ore surge stockpiling – If weather and ore conditions are such that fugitive emissions are generated from the coarse ore surge stockpiling operation (as described in the Coarse Ore Surge Guidelines procedure), stockpiling activities are postponed until the unfavorable conditions subside. This may cause cancellation of train unloading at the Fairlane Plant. Operating records for the belt that runs to the coarse ore surge stockpile are maintained. Material drop distance – During winter unloading of fluxstone, the equipment operator will be able to control the distance at which the fluxstone material is emptied into the hopper. Minimizing the drop distance will diminish the amount of dust generated from unloading operations. Additional operational considerations – During the transitional seasons when weather conditions are more prone to cause dusting events (early spring and late fall) and during exceptional weather periods (minimal snow cover, drought conditions), additional operational considerations will be used to minimize liftoff from the tailings basin. Example considerations include, but are not limited to, incorporating weather forecasting into timing the relocation of the fine tailings discharge, modifying the relocation of the previously active fine tailings discharge locations (based on weather conditions), and other such operational considerations to the extent practicable. These strategies should help to mitigate liftoff conditions from the basin.

7. Daily Fugitive Emission Inspections: Daily Fugitive Emission Inspections are a key component of United’s Plan. Throughout the year, during both freezing and non-freezing conditions, Supervisors are assigned to conduct daily


fugitive emissions checks. Any deficiencies noted during the inspection are to be communicated for immediate corrective action (see below). The fugitive emission source areas are listed on the Daily Fugitive Emissions Inspection sheet. Each week, the inspection sheets are sent to the Section Manager of Plant Operations for a final review of completeness and to ensure that suitable corrective actions were taken by Operations personnel for any noted exceptions. The Section Manager of Plant Operations signs the Daily Fugitive Emissions Inspection sheet and sends it to the Environmental Department for recordkeeping and reporting. Supervisors are trained to observe fugitive emissions sources and their control system(s) by either a certified Visible Emissions (VE) Evaluator, or by becoming a certified VE evaluator. Supervisors observe and record the conditions of each area, as well as any corrective actions taken (as described in the next section). Records of all certified VE Evaluators and the records of the people trained by the certified evaluator are kept. The Tailings Basin Supervisor or the Tailings Basin Engineer is responsible for identifying areas of concern for lift off on the basin, and for initiating preventative actions to address any potential areas of concern. Daily observations conducted by the Tailings Basin Supervisor or the Tailings Basin Engineer allow for early identification of potential problem areas, allowing for proactive measures to be implemented. Haul roads and service roads are travelled throughout the day. All United personnel are required to report fugitive emission conditions that require attention. Observed fugitive emissions should be reported to the Supervisor or other appropriate Manager. These conditions will be investigated and corrective actions taken as necessary. Additional investigation will be conducted during conditions when fugitive emissions may be leaving the facility property line. Any fugitive emissions events observed outside of the Daily Fugitive Emission Inspection and subsequent investigation will be recorded using the Fugitive Emission Inspection Log. If the Supervisor or Manager cannot successfully deploy water trucks or implement other corrective actions described in this Plan, the Environmental Department will be notified. The Environmental Department will advise if any additional, contingent control measures should be implemented and will make any necessary notifications to the MPCA.

8. Corrective Actions: Corrective actions are to be recorded on the Daily Fugitive Emissions Inspection form. The Supervisor conducting the Daily Fugitive Emissions checks will note if corrective action is needed and take any necessary steps to address the issue. The Basin Supervisor or Engineer, Operations Supervisor, or Manager is authorized to initiate any necessary corrective actions. Corrective actions may consist of, but are not limited to, maintenance or repair of malfunctioning equipment, extraordinary operation of routine fugitive control equipment, grading of the roads to increase water absorption, reallocation of water trucks to problematic areas, vendor application of chemical dust suppressant, or extraordinary measures required to prevent avoidable fugitive emissions. If corrective actions have been implemented, but fugitive emissions persist, the Basin Supervisor, Operations Supervisor, or Operations Section Manager will notify the Environmental Department for further instructions.

9. Exception Reporting: An exception is a condition where the control strategy detailed in the Plan cannot be implemented or are ineffective. Items simply noted as deficiencies on the daily inspection form are not considered exceptions by themselves unless the necessary corrective actions were ineffective or could not be implemented. The date of any exception and the actions taken to address exception conditions must be identified on the Daily Visible Emission Inspection form. These items should be clearly labeled as “Exceptions” and should be differentiated from routine visible emission inspection findings.

Exceptions may require additional investigation to determine whether fugitive dust impacts remain within the property boundary or have traveled beyond the property boundaries. Exceptions that are suspected to be leaving the


property boundaries will require additional investigation to confirm whether any offsite areas have been impacted. Exceptions that are determined to be leaving the property boundary shall be reported to the MPCA by the Environmental Department, with updates provided to the agency on a daily basis during the work week until the event has ended. The following information will be recorded during an Exception event.

Geographic extent of the event (onsite/offsite; list of offsite areas impacted)

Duration of the event (include start and end dates and times)

Fine tailings spigotting locations prior to, during, and following the event

Detailed records of corrective actions taken to address the event and discussion of their effectiveness A post-event evaluation will be completed on all Exceptions resulting in observed offsite fugitive dust impacts.

10. Training: Facility personnel are instructed of their fugitive emission responsibilities through a number of different methods. Fugitive emissions have been identified as a significant environmental aspect though United’s ISO 14001 Environmental Management System. As such, general awareness training for fugitive emissions is presented to all employees, and associated records are kept. Training consists of instruction in what are fugitive emissions, why controls are used, procedures for each control method, and record keeping requirements and procedures. Visible Emissions Evaluator certification is maintained by at least one company employee or consultant every three years. The certified person trains the Supervisors responsible for daily checks as listed on the Daily Fugitive Emissions Inspection sheets. Training records kept include the following information: date and time of training, location of the training, person conducting the training, training attendees, and a general description of the training.

11. Haul Road Information: The active haul roads at the Fairlane Plant consist of the unpaved roads from the Coarse Tailings Load-out pocket to the far southwest corner of Tailings Basin 2. The active haul roads encompass Tailings Basin 2 and include a lower road, a dike crest road and associated ramps. Total active haul road distance is approximately 13 miles (including lower road, dike crest road, and ramps). The Tailings Basin 2 Barge road is not considered an active haul road. Various other unpaved roads exist around the Plant to allow for light fleet and service vehicle traffic. These other unpaved roads are not considered haul roads because they are not designed for and normally do not accommodate production truck traffic.

12. Records: The following records are maintained at United:

Daily Visible Emission Inspection forms and fugitive emission Exception reports (on the Daily Visible Emission Inspection form or other tracking mechanism);

Water Truck Shift Summary forms;

Water truck operating hours;

Grader operating hours;

Chemical usage for dust suppression;

Mulch records;

Vegetation records;

Haul road information (active haul roads maps);

Production truck vehicle miles traveled estimates;

Production records (concentrate moisture, fine ore surge (FOS) tonnage, coarse ore surge (COS) tonnage, etc);

Equipment operating hours;


Operating hours for the Coarse Ore Surge belt;

Mechanical cleaning operating hours (during active concentrate hauling);

Precipitation data;

Post-exception event evaluation; and Training records.

13. Revisions

Date Description Sections Affected

5/23/00 Plan issued All

6/24/05 Plan updated All

6/18/10 Plan updated to reflect Level III-A requirements All

1/22/15 Plan updated to reflect modifications discussed with MPCA 5.0

4/22/15 Plan updated All

2/29/16 Plan updated to reflect added FS from concentrate hauling and to include Revisions

3.0, 4.0, 11.0

6/16/16 Plan updated to reflect added FS from winter fluxstone unloading. Modifications made to format (added Definitions (2.0) and Forms Used (3.0).

All

10/10/16 Plan updated to reflect modifications discussed with MPCA 1.0, 3.0, 5.0 – 8.0

12/19/16 Plan updated to reflect additional recommendations provided by MPCA on 12/1/16

5.0 (vegetation, mulch), 7.0, 9.0, 12.0


Appendix F. Waste Gas Scrubber Solids and Mercury Analysis Plan

This appendix contains the Waste Gas Scrubber Solids and Mercury Analysis Plan. This plan contains the specific calculation procedures for tracking mercury emissions. The Waste Gas Scrubber Solids and Mercury Analysis Plan is comprised of the following documents:

I. Waste Gas Scrubber Solids and Mercury Analysis Plan, Guiding Document – This document describes the background for development of the plan and prescribes the mercury sampling procedures, contingency measures and the high level calculation procedure for the mercury accounting method required to demonstrate mercury emission neutrality as a result of burning solid fuels on Line 1 and the increased production that was permitted in Permit Action 13700113-005.

II. Waste Gas Scrubber Solids and Mercury Analysis Plan, Mercury Accounting Calculation Methodology – This document describes the detailed calculations for tracking mercury at United Taconite. The document walks through an example calculation to demonstrate the mercury accounting methodology.


Waste Gas Scrubber Solids and Mercury Analysis Plan, Guiding Document 1) Objective: United Taconite (UTAC) developed a mercury sampling and analysis plan as part of the amendment to the

MPCA Title V Air Permit that was issued on June 22, 2010. Permit Action No. 13700113-005 required that UTAC offset mercury emissions from the three mercury sources associated with this project: production above 5.436 million long tons of pellets on a 12-month rolling sum, combustion of solid fuels on Line 1, and the variability of mercury in the ore processed for production increase above 5.436 MLTPY. UTAC has and will remain mercury neutral via an altered furnace waste gas scrubber circuit that allows scrubber solids to either continue to be recycled, or be removed from the circuit and “wasted” to the tailings basin.

2) Background: United Taconite’s historical scrubber configuration has been a closed-loop system. Process gases from the pellet plant furnaces pass through wet scrubbers before being emitted to the atmosphere. The scrubber effluent is sent to dedicated thickeners for each scrubber, where the solids settle out and discharge through the underflow, and the clarified water discharges through the overflow. The overflow water is recycled back into the scrubbers, while the thickened underflow is sent back to the concentrator to be made into pellets. To accommodate for scrubber solids wasting, UTAC now has the ability to route the scrubber thickener underflows to a separate, dedicated scrubber solids wasting thickener (#2 Thickener). At this thickener, the scrubber underflow slurry will further settle out. From the wasting thickener, the underflow solids will be sent to the tailings basin, while the overflow water will be recycled in the system as process water. The goal of this plan is to remain mercury neutral with the addition of solid fuel on Line 1 and production above 5.436 MLTPY (5.436 MLTPY was the permitted pellet production level prior to permit action 13700113-005). Since solid fuel use on Line 2 is already part of United Taconite’s mercury baseline, collecting this information is not currently part of United Taconite’s strategy and commitment to remain mercury neutral. Should United Taconite elect to test alternative fuel sources on Line 2, this plan may need to be revised as described above to account for any alternative fuel sources that may be higher in mercury.

3) Sampling Plan: United Taconite has developed the following sampling plan to determine the project-related mercury increases. The sampling frequencies are described below and contained in the sample summary table included in this document. The permit required UTAC to collect one year of data (or a statistically representative sample size) before being allowed to submit for the MPCA’s approval an alternative sampling collection frequency. As of the September 2013 revision, over 2 years of data had been collected to support UTAC’s plan. a) Greenball Sampling: Greenball grab samples will be taken from the roll feeder (or other representative location)

on each line once per week. Greenball sampling will occur during any week that the facility is producing greenballs on Lines 1 or 2. These two grab samples will be composited, pulverized, and analyzed by a certified lab using EPA method 7471A (or its accepted equivalent). The average mercury concentration of the weekly grab samples will be multiplied by the weekly greenball production, as measured by belt scales, of both furnace Lines 1 and 2 to generate a weekly mercury mass flow. i) An average greenball composition for Line 1 and Line 2 is being used because:

(1) Greenball composition does not differ between Line 1 or Line 2 furnace. All greenballs made are equal and can be fired on either furnace.

(2) UTAC currently produces only one type of pellet product at any given time. (3) The mercury increase from the greenball production is only factored in after total facility pellet

production exceeds 5.436 MLTPY on a 12-month rolling basis. Averaging composite greenball samples across both production lines matches this expectation.


b) Solid Fuel Sampling: Solid fuel samples will be taken weekly from the Line 1 pulverized fuel pipe (or other representative location). Solid fuel sampling will occur any week that solid fuels are combusted on Line 1. This sample location is representative of the solid fuel blend being utilized on Line 1. The sample will be analyzed by a certified lab using EPA method 7471A (or its accepted equivalent). The result of the weekly analysis will be combined with the total quantity of solid fuel use on the Line 1 furnace as measured by belt scales for that week to generate a weekly mercury mass flow. United Taconite also has the capability to test burn alternative fuel sources (biofuels). Testing of these types of fuels may require future revisions to this plan, and would be addressed as part of the Alternative Fuel Testing Plan that is required prior to testing alternative fuel sources.

c) Sampling of Scrubber Solids Wasted to the Basin: Scrubber solids are categorized by two processes, overflow and underflow, which separate according to their particle size. The overflow, or the portion of the solids which stays at the top of the thickener, is considered the fine size fraction. The underflow, or the portion of the solids that sinks to the bottom of the thickener, is considered the coarse size fraction. The coarse and fine scrubber solids are separated by thickeners – #4 and #5 thickeners for Line 1; #9 and #10 thickeners for Line 2. The thickeners separate the two size fractions through the settling of particles. During scrubber solids wasting, the coarse size fraction (underflow) is pumped from one or more of the Line 1 (#4 and #5) and/or Line 2 (#9 and #10) scrubber thickeners to the scrubber solids wasting thickener (#2). The particles further settle in the solids wasting thickener, where the coarse size fraction (underflow) is sent to the tailings basin, and the fine size fraction (overflow) is recycled in the plant as process water. When scrubber solids are not being wasted (i.e,. when the overflow reports back to the scrubbers and the underflow is recycled back into the concentrator), both underflow and overflow are recycled back into the process. Scrubber solid slurry samples are taken from the #2 Thickener Underflow (Scrubber Wasting Thickener) at least weekly when scrubber solids are being wasted. During non-wasting periods, scrubber solid slurry samples will not be taken as they will be re-circulated through the process and not sent to the #2 thickener for routing to the tailings basin. The scrubber solid slurry sample is filtered by the lab to separate the solids from the liquid portion. The solids are analyzed using EPA method 7471A (or its accepted equivalent), and liquids, when analyzed, are completed using EPA method 7470A (or its accepted equivalent). Results from the weekly analysis are combined with the total flow rate for that week and its average weekly density measured from the underflow wasting circuit to generate a weekly mercury mass flow. Due to the negligible amount of mercury contained in the liquid portion of the slurry sample, the MPCA will not require this fraction to be analyzed. The amount of scrubber solids slurry wasted to the tailings basin is monitored using a flow meter and density gauge. These real-time readings are paired with the laboratory analysis to derive the mass of mercury wasted to the tailings basin.


Mercury Inputs and Outputs: Sample Summary Table Sample Location Type Flow Rate Matrix Minimum

Frequency

Amount

Collected2

Lab

Analysis

Method3

Input:

Greenballs

Line 1 Roll Feeder

and Line 2 Roll

Feeder

Grab

Sample

Online Belt

Scale

Solid 1x/week 4 oz. jar ≥

1/2 full

EPA

7471A

Input: Solid

Fuel

Line 1 Pulverized

Fuel Pipe

Grab

Sample

Online Belt

Scale

Solid 1x/week 2 oz. jar ≥

1/2 full

EPA

7471A

Output:

Wasting

Circuit

#2 Thickener

Underflow

Grab

Sample

Online Flow

meter

Slurry 1x/week1 (2) 1-Liter

containers

EPA

7471A

(solids) 1 Samples to be taken only during times when scrubber solids are being wasted. 2 Amount collected will be consistent with EPA lab analysis methodology being used. 3 Analysis will use methodology stated or its accepted equivalent.

4) Reaction Plan to Variation: United Taconite has developed an average and a standard deviation for the greenballs

and solid fuel from the data collected to-date. The following steps will be taken to assess and manage sample variation: a) If the results of a sample are more than three standard deviations from the established average value, a second,

confirmation analysis of that same sample will be initiated immediately upon receipt of the initial results. b) If the second confirmation result is within 10% of the first result, or is still more than three standard deviations

from the historic average, UTAC will immediately switch to sampling at least twice per week until the sample result falls back within one standard deviation from the historic average.

c) If the sample results continue to remain above the historic average (≥20 samples), UTAC will reevaluate the historic average and assess if a new average should be set. Setting of a new average is subject to MPCA review and approval.

Note that the individual data points are used in the mercury wasting balance calculations further described in this document.

5) Calculations and Recordkeeping: Weekly sample analysis will be paired with the plant production data to calculate

the mercury inputs and outputs in the system and maintain the mercury-neutral status for the facility. Additional information regarding the calculation methods can be found in Appendix F (II), ‘Mercury Accounting Calculation Methodology.’ The following equation represents the method to be used to determine that the facility remains mercury-neutral:

Hg in Line 1

Solid Fuel Use +

Hg in Greenball

with Pellet

Production

>5.436 MLTPY

≤

Hg in Scrubber

Solids Wasted to

Tailings Basin

+ Banked Hg

Reductions


a) By the last day of each month, UTAC will reconcile the project-related mercury inputs for the prior month, measured weekly, as follows: i) Contribution from Line 1 Solid Fuel Use:

[ Monthly Hg Sample

Analysis: Solid Fuel

(adjusted for moisture)

x Monthly Solid Fuel

Usage ] =

Pounds Per Month of

Project-Related Hg

Increases

ii) Contribution from Production Above 5.436 Million Long Tons Pellets Per Year:

[ 1 - ( 5,436,000

Long Tons

Pellets

÷

12-month

rolling sum

of pellets

(long tons) ) ]x [

Monthly

Hg Sample

Analysis:

Greenballs

x

Monthly

Greenball

Production

(adjusted for

moisture)

]=

Pounds Per

Month of

Project-

Related Hg

Increases

Mercury content from greenball production will be accounted for once fired pellet production is greater than 5.436 MLTPY. The pellet production is tracked within the mercury tracking spreadsheet, and serves as the trigger point to begin accounting for mercury content in the greenballs by applying a ratio of the pellets being made over the permit production baseline of 5.436 MLTPY to the monthly greenball production. This approach recognizes potential variability of the mercury content in the ore body over time. Fired pellet production in the mercury tracking spreadsheet will be recorded monthly using the facility production number provided by the finance department to ensure accurate accounting. This number is derived using state certified train scales and on-site inventory estimates.

b) By the last day of each month, UTAC will reconcile the project-related mercury wasting for the prior month, measured weekly, using the following formula:

Weekly Hg

Sample Analysis:

Scrubber Solids

x [ Flow rate of

Scrubber Solids

Routed to

Basin

x

Density of

Solids in the

Waste

Stream ] =

Pounds per week

of Scrubber

Solids Hg Wasted

to Tailings Basin


c) By the last day of every month, UTAC will calculate and record the annual mercury emissions attributed to the project-related increases. It will also reconcile the project-related mercury emission with the mercury emissions off-set by routing scrubber solids to the tailings basin and any banked mercury reductions. i) By the last day of every month, UTAC will calculate and record the quantity of scrubber solids routed to the

tailings basin during the previous month, the type and quantity of fuel combusted for Line 1 during the previous month, and UTAC’s pellet production rate during the previous month. Scrubber solids routed to the tailings basin will be measured using the methods described above. The type and quantity of fuel combusted on Line 1 will be measured using a belt scale for solid fuel and a flow meter for natural gas. UTAC’s monthly pellet production will be based upon the official number reported by UTAC’s finance department. The monthly production number is derived using certified train scales and on-site inventory estimates (based upon pellet production scales).

ii) By the last day of every month, UTAC will calculate and record the 12-month rolling sum of scrubber solids routed to the basin, the 12-month rolling sum of the quantity of each fuel combusted for Line 1, and the 12-month rolling sum of UTAC’s pellet production rate according to the MPCA’s required method for determining a 12-month rolling sum in the UTAC permit.

iii) By the last day of every month, UTAC will reconcile its project-related mercury emissions by summing the project-related emissions for that calendar year and comparing them against the mercury emissions off-set by routing scrubber solids to the tailings basin for that calendar year and any banked mercury reductions from previous years using the following equation:

Hg in Line 1

Solid Fuel Use +

Hg in Greenball

for Pellet

Production >5.436

MLTPY

≤

Hg in Scrubber

Solids Wasted

to Tailings Basin

+ Banked Hg

Reductions

Banked Hg

Reductions,

new

=

Banked Hg

Reductions,

old

+ [Hg in

Scrubber

Solids Wasted

to Tailings

Basin

- (Hg in Line 1

Solid Fuel

Use

+

Hg in Greenball

for Pellet

Production

>5.436 MLTPY )]

d) By January 31st of every year, UTAC will submit an annual report to MPCA summing the annual project-related

mercury emissions, the annual amount of mercury emissions off-set by routing scrubber solids to the tailings basin, and any banked mercury reductions held. The data relied upon for the year in making the calculations will be sent to the MPCA in an Excel spreadsheet or other agreed upon format upon request.

e) Records will be kept a minimum of 5 years from the date of monitoring, sampling, measuring, or reporting.


Waste Gas Scrubber Solids and Mercury Analysis Plan, Mercury Accounting Calculation Methodology The spreadsheet below1 will be used to explain the mercury removal accounting method.

A B C D E F G

1 Month Monthly

L1 coal

Hg input

(lb)

Monthly

L1+L2 GB

Hg input

(lb)

12-month

Rolling Sum of

pellets fired

(Long Tons)

Monthly Hg

output:

2A U/F → basin

(lb)

Monthly Hg

removal req. 2A

U/F output

(lb)

Cumulative

mass of Hg

taken out

(lb)

2 Jul 2011 3 Aug 2011 0.003 6.672 0.801 0.003 0.798 4 Sep 2011 0.057 12.356 1.323 0.057 2.064 5 Oct 2011 0.025 14.845 1.376 0.025 3.415 6 Nov 2011 0.000 12.181 1.693 0.000 5.109 7 Dec 2011 0.007 10.658 5,149,702 1.724 0.007 6.826 8 Jan 2012 0.000 10.564 5,065,903 0.792 0.000 7.618 9 Feb 2012 0.020 11.250 5,133,558 0.915 0.020 8.513

10 Mar 2012 0.056 9.115 5,256,872 0.788 0.056 9.244 11 Apr 2012 0.062 12.978 5,255,491 1.506 0.062 10.688 12 May 2012 0.049 12.925 5,247,584 1.313 0.049 11.952 13 Jun 2012 0.025 12.304 5,276,358 0.735 0.025 12.662 14 Jul 2012 0.044 13.345 5,287,475 1.304 0.044 13.922 15 Aug 2012 0.021 8.167 5,160,610 0.656 0.021 14.557 16 Sep 2012 0.039 11.374 5,288,889 1.041 0.039 15.558 17 Oct 2012 0.019 10.109 5,187,391 0.968 0.019 16.508 18 Nov 2012 0.095 12.205 5,266,456 1.405 0.095 17.818 19 Dec 2012 0.081 12.318 5,354,802 1.050 0.081 18.788 20 Jan 2013 0.009 9.897 5,365,499 0.142 0.009 18.921 21 Feb 2013 0.075 12.150 5,387,159 1.367 0.075 20.213 22 Mar 2013 0.076 8.980 5,347,272 1.033 0.076 21.170 23 Apr 2013 0.072 16.514 5,331,389 1.449 0.072 22.548 24 May 2013 0.038 12.202 5,284,383 1.456 0.038 23.966 25 Jun 2013 0.027 10.547 5,314,656 1.296 0.027 25.235 26 Jul 2013 0.034 12.718 5,314,208 1.017 0.034 26.218 27 Aug 2013 0.014 14.781 5,437,104 1.289 0.017 27.490 28 Sep 2013 0.044 13.108 5,440,565 1.665 0.055 29.099 29 Oct 2013 0.025 11.111 5,416,610 0.899 0.025 29.974 30 Nov 2013 0.065 11.562 5,365,991 1.108 0.065 31.018 31 Dec 2013 0.003 8.607 5,203,558 0.924 0.003 31.939 32 Jan 2014 0.000 8.489 5,145,518 0.756 0.000 32.695 33 Feb 2014 0.016 7.028 4,939,677 1.650 0.016 34.330 34 Mar 2014 0.060 6.320 4,874,554 0.892 0.060 35.162 35 Apr 2014 0.035 12.057 4,770,269 0.867 0.035 35.994 36 May 2014 0.028 16.183 4,815,028 1.574 0.028 37.540 37 Jun 2014 0.035 13.852 4,876,293 0.841 0.035 38.346 38 Jul 2014 0.056 11.614 4,818,168 0.468 0.056 38.758 39 Aug 2014 0.024 11.130 4,718,878 0.000 0.024 38.734 40 Sep 2014 0.052 13.754 4,710,605 0.000 0.052 38.681

1 While values in column D are in long tons (1LT = 2240 lb), others are in lb.


Daily Throughput of Fuel, Green Ball, and Scrubber-Captured Solid While daily throughput of fuel (ton of coal/day) and green ball – unfired pellet – (LT/day) are readily available from UTAC’s process computer, daily throughput of the scrubber-captured solid ducted to the tailings basin with the underflow of Thickener 2A, 𝑚 , is calculated with the following formula.

𝑚𝑠 6 𝐺𝑝1 𝑓𝑠 𝑖𝑛 𝑝

𝑓𝑠 𝑖𝑛 𝑝

1𝑆𝐺

1.12 6 1601 0.011

0.0111

4.951.12 9.908

𝐿𝑇𝑑𝑎𝑦

1

Where: 𝐺𝑝 is the daily average of the slurry (pulp) flow rate, gallon/min; on 3/1/2012, 𝐺𝑝 = 160 GPM;

𝑓𝑠 𝑖𝑛 𝑝 is daily average of mass fraction of the solids in pulp; on 3/1/2012, 𝑓𝑠 𝑖𝑛 𝑝 = 0.011;

𝑆𝐺 is specific gravity of the solids in the pulp; 𝑆𝐺 = 4.95, according to UTAC. Weekly Mercury Sampling and Laboratory Analysis Results One or two samples are collected per week, respectively, from fuel, green ball,2 and the underflow of Thickener 2A (solid and water). Mercury content (mg/kg, air dry) and % solid, along with detection limits (RL2), were reported by the laboratory. For the very few values that are below detection – e.g., the coal sample collected on 4/5/2012 was reported as “0.0037 J” with RL = 0.0050 mg/kg – are substituted with the analyst’s guessed values – 0.0037 mg/kg – for subsequent calculations in the spreadsheet. Because fuel and green balls contain moisture, their mercury contents reported by the laboratory need to be converted to the “as-received basis.” For the fuel sample of 3/1/2012, which was the only sample for the week of 2/26/2013 to 3/3/2012, we have, 0.01 (mg/kg, air dry) × 99.7/100 = 0.00997 × 10-6 (lb/lb, as-received), which is used for each day of the week; with two green ball samples were collected for the week – on 2/28/2012 and 3/1/2012 – we can calculate the average value for each day as follows:

= AVERAGE (0.01*90.5/100, 0.01*90.2/100) = 0.009035 × 10-6 (lb/lb, as-received).

For the scrubber-captured solid, because 𝑚 is assumed to be dry (moisture-free) in the derivation3 of Eq. [1] above, the laboratory reported mercury content (mg/kg, air dry) is used directly. For the week of 2/26/2013 to 3/3/2012, two solid samples were collected from the underflow of Thickener 2A – on 2/28/2012 and 3/1/2012 – we have the average value for each day as:

= AVERAGE (1.88, 0.53) = 1.205 × 10-6 (lb/lb, air dry).

Missing Data: For the week of 9/23/2012 to 9/29/2012, no green ball sample was collected for mercury analysis (Line 2 was in operation but Line 1 was not). The average of 0.014 mg/kg (as-received) for 9/22/2012 and 0.009 mg/kg (as-received) on 9/30/2012, i.e., 0.012 mg/kg as received, is assigned to each day of the week. Coal often was not sampled when it was not used at Line 1 for the week.

2 Fuel and green ball were analyzed by EPA Method 7471B using a 2 g aliquot of sample, aiming at reporting limits (RL) of 0.0049 to 0.0055 mg/kg. 3 See MPCA document, ‘Derivation of a Slurry Equation’


Daily Mercury Input and Output Calculation – An Example (3/1/2012) Line 1 coal Hg input = 0.00997 × 10-6 (lb/lb) × 2000 (lb/ton) × 137.15 (ton/day) = 0.00274 (lb/day) Lines 1 & 2 GB Hg input = 0.009035 × 10-6 (lb/lb) × 2240 (lb/LT) × 6682 (LT/day) = 0.13524 (lb/day) Hg output to basin = 1.205 × 10-6 (lb/lb) × 2240 (lb/LT) × 9.908 (LT/day) = 0.02674 (lb/day) These values contribute to the monthly values of March 2012 in cells B10, C10, and E10, respectively, in the spreadsheet. Mercury Removal from Scrubber Feedback Loops by “Wasting Solids” and the Air Permit Requirement UTAC discharged, on 3/1/2012, 9.908 LT of scrubber-captured solid to the tailings basin to prevent 0.02674 lb of mercury from being reintroduced into the making of green ball (agglomerating process).4 UTAC’s air permit requires it to offset fuel mercury due to coal-firing at Line 1,5 and to offset mercury due to the increased pellet production above 5.436 million LT in a 12-month rolling period. UTAC chose to accomplish these offsets by not reintroducing all or parts of the scrubber-captured solids – part of which tend to be associated with mercury – into the agglomerating process. To implement this permit requirement, we can use in cell F2 the following IF-function and fill the function down to cell F40, = IF (D2 > 5436000, B2 + (1 - 5436000/D2)*C2, B2) [2]

Where column B holds monthly fuel mercury input, column C holds monthly green ball mercury input, and column C holds the 12-month rolling sum of pellet production.6

As cell D27 > 5436000, i.e., pellets made for the 12 months ending on 8/31/2013 exceeded 5.436 million LT,

Cell F27 = B27 + (1 - 5436000/D27)*C27 = 0.014 + (1 - 5436000/5437104)*14.781 = 0.017

Mass of mercury removed in August 2013 was 1.289 lb (the value in cell E26), so the mercury account balance is:

Cell G27 = G26 + E27 - F27 = 26.218 + 1.289 - 0.017 = 27.490

We can enter a formula similar to that of cell G27 in other cells of column G.

4 At current process configuration and operating conditions, UTAC does not facilitate separation of mercury-containing scrubber-captured solid particles that tend to be non-magnetic from the useful magnetic iron particles in the solids; thus, “wasting” the scrubber-captured solid to the tailings basin is one option to manage mercury emission from the furnace. 5 Prior to issuance of Permit No. 13700113-005, coal was not a fuel option allowed for UTAC’s Line 1 furnace. 6 In [2], B2+(1-5436000/D2)*C2, which estimates fuel mercury input for coal-firing at Line 1 and the mercury input due to the extra pellets made above 5.436 million LT in a 12-month period by proportions. Fortunately, D2 (a blank cell in the spreadsheet) is less than 5436000, cell F2 is set to equal to B2, no need to evaluate 5436000/0.


Appendix G. Maximum Contents of Materials (Fluxstone and Bentonite Material Handling Operations) This appendix contains the maximum material composition and throughputs, production, or other bases that were used to calculate potential emissions for the fluxstone and bentonite material handling operations added as part of Air Emissions Permit No. 13700113-007. These assumptions are presented in the tables below and were used in combination with the existing facility, taconite pellet production limit of 6 million long tons per year to determine the annual emission rates of the fluxstone handling equipment (EQUIs 173-179, EQUI 181, EQUIs 183-184, EQUIs 205-206, and FUGIs 35-36) and the bentonite handling equipment (EQUIs 171-172). These assumptions are not limits; however, changing to a material composition that has a higher bentonite or fluxstone content, or increasing the bentonite or fluxstone throughput rate, is considered a change in method of operation that must be evaluated under Minn. R. 7007.1200, subp. 3 to determine if a permit amendment or notification is required under Minn. R. 7007.1150.

The table below shows the maximum material composition for fluxstone and bentonite (note 1 Long Ton = 2240 Lbs). Table H1: Maximum Material Contents Summary

Parameter Total Units Comments

A Fluxstone Content (wet)

12.8% Percentage Based on adding 14.7 lb flux to 100 lb concentrate (14.7 lb/114.7 lb)

B Safety Factor for Handling

25% Percentage

C Maximum Fluxstone Content

(wet)

18.375 Lb Fluxstone / 100 Lb Concentrate C = A x (1 + B)

D Bentonite Content 20 Lb Bentonite / Long Ton Pellets

The table below shows the annual throughputs used in the calculations of potential emissions from each of the fluxstone and bentonite material handling sources. The hourly throughput values are based on the design capacity of the specific emission source and are not shown in the below table (with an exception for EQUI 172, see below) while the annual throughputs were calculated using the information in the previous table.


Table H2: Fluxstone and Bentonite Annual Throughput Summary Emission Source

Description Annual Throughput

Annual Units

EQUI 171 Bentonite Unloading (Truck to Bin) 50,111 Tons / Year EQUI 172 Bentonite Conveying (Bin to #5 Conveyor)* 50,111 Tons / Year EQUI 173 Fluxstone Railcar Summer Unloading (Bottom Dump to CV-001A) 1,041,649 Tons / Year EQUI 174 Fluxstone Summer Conveying (CV-001A to CV-002) 1,041,649 Tons / Year EQUI 175 Fluxstone Winter Conveying (CV-001B to CV-002) 1,041,649 Tons / Year EQUI 176 Fluxstone Conveying (CV-002 to CV-003) 1,041,649 Tons / Year EQUI 177 Fluxstone Transfer (CV-003 to Bin 1) 1,041,649 Tons / Year EQUI 178 Fluxstone Transfer (CV-003 to Bin 2) 1,041,649 Tons / Year EQUI 179 Fluxstone Transfer (Bin 1 to CV-005) 1,041,649 Tons / Year EQUI 181 Fluxstone Conveying (CV-003 to Stockpile) 1,041,649 Tons / Year EQUI 183 Fluxstone Reclaiming (CV-004 to CV-005) 1,041,649 Tons / Year EQUI 184 Fluxstone Crusher (CV-005 to Roll Crusher to CV-006) 1,041,649 Tons / Year EQUI 205 Fluxstone Transfer (Bin 2 to CV-005) 1,041,649 Tons / Year EQUI 206 Fluxstone Reclaiming (Loader to Hopper) 1,041,649 Tons / Year FUGI 35 Fluxstone Railcar Winter Unloading (Railcar to Hopper) 1,041,649 Tons / Year FUGI 36 Fluxstone Railcar Winter Unloading (Hopper to CV-001B) 1,041,649 Tons / Year

*The hourly throughput for EQUI 172 is determined using the same desired bentonite content value (20 lb bentonite / long ton pellets) but uses the short term, one hour maximum pellet production rate from each furnace (250 and 600 long tons / hour from Furnace 1 and Furnace 2, respectively) to determine the required bentonite throughput (20 lb bentonite / long ton pellets x (250 + 600 long ton pellets / hour on Furnaces 1 and 2) / 2,000 lb/ton = 8.5 tons bentonite/hour).


Appendix H. Induration furnaces PM, PM10, and PM2.5 emissions calculations This appendix specifies the equation to be used to calculate PM, PM10, and PM2.5 emissions from EQUI 45 and EQUI 47 to demonstrate compliance with the annual emission limits. The emission factors in Table 1 and Table 2 are subject to change according to the protocols for resetting the PM, PM10, and PM2.5 emission factors in the permit. Equation 1. Furnace emission calculations

𝐸𝑃 𝐹 ℎ 𝐹 ℎ 𝐹 ℎ

2000 𝐻

Where:

E = monthly PM emissions (ton/month); P = monthly pellet production (LT/month); Fsolid = solid fuel emission factor from Table 1 or Table 2 (lb/LT); hsolid = monthly heat input for solid fuel (MMBtu/month); Foil = distillate oil emission factor from Table 1 or Table 2 (lb/LT); hoil = monthly heat input for distillate oil (MMBtu/month); Fgas = natural gas emission factor from Table 1 or Table 2 (lb/LT); hgas = monthly heat input for natural gas (MMBtu/month); and H = month heat input for all fuel types (MMBtu/month).

Table 1. EQUI 45 emission factors

Pollutant Solid fuel, Fsolid (lb/LT)

Distillate oil, Foil (lb/LT)

Natural gas, Fgas (lb/LT)

PM 0.0573 0.0573 0.0357

PM10 0.1101 0.1101 0.0631

PM2.5 0.1101 0.1101 0.0631

Table 2. EQUI 47 emission factors

Pollutant Solid fuel, Fsolid (lb/LT)

Distillate oil, Foil (lb/LT)

Natural gas, Fgas (lb/LT)

PM 0.0767 0.0767 0.0616

PM10 0.1009 0.1009 0.0939

PM2.5 0.1009 0.1009 0.0939

Documents

Intent to Amend Air Emission Permit to United Taconite LLC ... · Permit issued: [month day, year] 13700113-102 Permit expires: [month day, year] Page 5 of 230 3. Facility description