DOCUMENT 00 00 11 ADDENDUM NO. 1 June 1, 2015 2015 …2.fmbx.org/files/060415-2015-water-treatment-plant-renovations... · 2015 Water Treatment Plant Renovations Pelican Rapids,

Addendum PELIC 131212 00 00 11 - 1

DOCUMENT 00 00 11

ADDENDUM NO. 1 June 1, 2015

2015 Water Treatment Plant Renovations

Pelican Rapids, Minnesoat

SEH No. PELIC 131212 City No. 83

From: Short Elliott Hendrickson Inc.

416 South 6th Street, Suite 200 Brainerd, MN 56401-3540 218.855.1700

To: Document Holders DOCUMENT HOLDERS on the above-named project are hereby notified that this document shall be appended to, take precedence over and become part of the original bidding documents dated March 27, 2015 for this work. Bids submitted for the construction of this work shall conform to this document.

This addendum consists of 2 pages and attached Document No. 00 73 44 Revised Federal Heavy Prevailing Wage Decision No. MN150118, dated 05/22/15, Document No. 00 73 44 Revised Federal Building Prevailing Wage Decision No. MN150066, dated 05/22/15, Revised Section No. 44 41 30 Filter Rehabilitation & Modification (06/01/15), and Revised Section No. 44 44 13 Chemical Feed Equipment (06/01/15).

Changes to Bidding Requirements:

1. Document No. 00 41 00 Bid Form, Article 7.01, Paragraphs I & J, Page 3: Delete in their entirety.

Changes to Conditions of the Contract:

2. Document No. 00 73 44, Federal Heavy Prevailing Wage Decision No. MN150118, dated 01/02/15: Delete in its entirety, in lieu thereof, substitute the attached Revised Federal Heavy Prevailing Wage Decision No. MN150118, dated 05/22/15.

3. Document No. 00 73 44, Federal Building Prevailing Wage Decision No. MN150066, dated 03/27/15: Delete in its entirety, in lieu thereof, substitute the attached Revised Federal Building Prevailing Wage Decision No. MN150066, dated 05/22/15.

Changes to Specifications:

4. Section 01 11 00 Summary of Work, Article 1.04, Paragraph C, Page 1: Delete in its entirety, in lieu thereof, substitute the following:

“C. Water treatment production must be maintained to fulfil water system demands on a daily basis. Only one set of filter (1&2 or 3&4) may be taken out of extended service during a given period of time. At least one set of filters (Either 1&2 or 3&4) must be available to provide full City water supply on a daily basis.”

5. Section No. 40 90 00 Instrumentation and Control for Process Systems, Article 2.14, Paragraph H, Page 11: Add the following:

“4. ABB MagMaster MFF Series. 5. Badger, M-Series M-2000. 6. McCrometer (formerly Water Specialties) Ultra-Mag Line.”

Addendum 00 00 11 - 2 PELIC 131212

6. Section No. 40 92 40 Automated Process Valve Package, Article 1.01, Paragraph A, Page 1: Delete in its entirety, in lieu thereof, substitute the following:

“A. Section Includes: 1. New pneumatic valve actuators on existing filter face piping. 2. New valves and pneumatic valve actuators on new air backwash piping. 3. New electrical modulating valve actuators. 4. New air supply lines from air compressor to each pneumatic valve actuator. 5. New process instrumentation piping and fitting materials for pneumatically controlled valves,

pneumatic control panels. 6. Solenoid valves. 7 See valve actuator schedule in drawings for additional instruction.”

7. Section No. 44 41 30 Filter Rehabilitation & Modification: Delete in its entirety, in lieu thereof, substitute the attached Revised Section No. 44 41 30 Filter Rehabilitation & Modification (06/01/15).

8. Section No. 44 44 13 Chemical Feed Equipment: Delete in its entirety, in lieu thereof, substitute the attached Revised Section No. 44 44 13 Chemical Feed Equipment (06/01/15).

Changes to Drawings:

9. Drawing GG3, Process Flow Schematic & Valve Schedule: a. Remove valves V-21V and V-43V from the valve schedule. These valves will remain in place and will not

receive new valve actuators. b. Add valve V-ISO-01, this new valve will be a 6-inh butterfly valve with a manual hand wheel operator.

10. Drawing 01R1 Process Equipment and Piping Removal: Add Keynote 13 at backwash supply water inlet corresponding to bottom photo. Keynote shall read: Remove exiting process piping, fittings and valves to accommodate new installations shown in section 2/01P2.

11. Drawing 01P1 Overall Process Plan: Relocate Keynote 11 as General Note No. 7.

12. Drawing 01P3 Filter Nos. 1 & 2 Modifications: a. Relocate Keynote 7 as General Note No. 4. b. Relabel section A/01P1 as A/01P3.

13. Drawing 01P4 Filter Nos. 3 &4 Modifications: a. Relabel Plan View A/01P1 as A/01P4. b. Add keynote leader 3 pointing to top wall sections of detail 1/01P4.

14. Drawing 01P5 Chemical Feed Plans: a. Relabel Plan Views A/01P1, B/01P1 and C/01P1 as A/01P5, B/01P5 and C/01P5.

15. Drawing 01E1 Electrical Plan:

a. Add the following: i. Provide 20amp GFCI duplex receptacle mounted 48"AFF located in chlorine storage cabinet (insulated

compartment). Coordinate location with equipment location. ii. Provide Fahrenheat cat no. MCM1503 portable fan-forced/ radiant heater and locate in in chlorine

storage cabinet (insulated compartment).

Note: Receipt of this Addendum No. 1 (dated June 1, 2015) shall be acknowledged on Page 00 41 00-2 of the

submitted Bid Form. Failure to do so may subject Bidder to disqualification.

END OF ADDENDUM

General Decision Number: MN150118 05/22/2015 MN118

Superseded General Decision Number: MN20140118

State: Minnesota

Construction Type: Heavy Heavy including Water and Sewer Lines

Counties: Big Stone, Chippewa, Cottonwood, Grant, Jackson, Kittson, Lac Qui Parle, Lincoln, Lyon, Marshall, Murray, Nobles, Norman, Otter Tail, Pennington, Pipestone, Pope, Red Lake, Redwood, Rock, Roseau, Stevens, Swift, Traverse, Wilkin and Yellow Medicine Counties in Minnesota.

HEAVY CONSTRUCTION PROJECTS (including sewer/water construction).

Note: Executive Order (EO) 13658 establishes an hourly minimum wage of $10.10 for 2015 that applies to all contracts subject to the Davis-Bacon Act for which the solicitation is issued on or after January 1, 2015. If this contract is covered by the EO, the contractor must pay all workers in any classification listed on this wage determination at least $10.10 (or the applicable wage rate listed on this wage determination, if it is higher) for all hours spent performing on the contract. The EO minimum wage rate will be adjusted annually. Additional information on contractor requirements and worker protections under the EO is available at www.dol.gov/whd/govcontracts.

Modification Number Publication Date 0 01/02/2015 1 05/22/2015

CARP0606-025 05/01/2011

BIG STONE, CHIPPEWA, COTTONWOOD, GRANT,JACKSON, LAC QUI PARLE, LINCOLN, LYON, MURRAY, NOBLES, PIPESTONE, POPE, REDWOOD, ROCK, STEVENS, SWIFT, TRAVERSE, YELLOW MEDICINE

Rates Fringes

CARPENTER (Form Work Only).......$ 24.11 14.78 ---------------------------------------------------------------- CARP0606-026 05/01/2011

KITTSON, MARSHALL, NORMAN, OTTER TAIL, PENNINGTON, RED LAKE, ROSEAU, WILKIN

Rates Fringes

CARPENTER (Form Work Only).......$ 24.25 14.64 ---------------------------------------------------------------- ELEC0292-025 09/01/2008

Page 1 of 7

5/28/2015http://www.wdol.gov/wdol/scafiles/davisbacon/MN118.dvb?v=1

BIG STONE, CHIPPEWA, LAC QUI PARLE, POPE, STEVENS, SWIFT

Rates Fringes

ELECTRICIAN Electrical Contracts $300,000 and over...........$ 28.17 18.55 Electrical Contracts under $300,000....................$ 27.04 18.27 ---------------------------------------------------------------- ELEC0343-023 07/01/2014

COTTONWOOD, JACKSON, LINCOLN, LYON, REDWOOD, YELLOW MEDICINE

Rates Fringes

ELECTRICIAN......................$ 30.30 10%+10.42 ---------------------------------------------------------------- ELEC0426-003 06/01/2014

MURRAY, NOBLES, PIPESTONE & ROCK COUNTIES

Rates Fringes

ELECTRICIAN 0 to 10 miles from Worthington, Minnesota, and 0 to 70 miles from Sioux Falls, South Daktoa...$ 22.19 10%+8.34 Remaining Area..............$ 26.09 9.5%+8.96 ---------------------------------------------------------------- ELEC1426-005 06/01/2014

GRANT, KITTSON, MARSHALL, NORMAN, OTTER TAIL, PENNINGTON, RED LAKE, ROSEAU, TRAVERSE & WILKIN COUNTIES

Rates Fringes

ELECTRICIAN......................$ 27.59 11.5%+8.20 ---------------------------------------------------------------- * ENGI0049-023 05/01/2015

Rates Fringes

OPERATOR: Power Equipment GROUP 2.....................$ 25.85 17.90 GROUP 3.....................$ 24.92 17.90 GROUP 4.....................$ 24.61 17.90 GROUP 5.....................$ 22.90 17.90 GROUP 6.....................$ 22.30 17.90

POWER EQUIPMENT OPERATOR CLASSIFICATIONS

GROUP 2: Crane with over 135' Boom, excluding jib; Hydraulic Backhoe with shovel-type controls, 3 cubic yards and over; Grader/Blade finishing earthwork and bituminous.

GROUP 3: Hydraulic Backhoe with shovel-type controls up to 3 cubic yards; Loader 5 cu yd and over (Excluding Sewer &

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Water lines); Mechanic; Tandem Scraper; Truck Crane; Crawler Crane

GROUP 4: Bituminous Roller 8 tons & over; Elevating Grader; Bobcat/Skid Steer Loader over 1 cu yd; Loader over 1 cu yd (Excluding Sewer & Water lines); Grader; Scraper up; to 32 cu yd; Farm Tractor with Backhoe attachment; Skid Steer Loader over 1 cu yd with Backhoe attachment; Loader over 1 cu yd (Excluding Sewer & Water lines); Tractor over 50 hp; Bulldozer over 50 hp.

GROUP 5: Bituminous Roller under 8 tons; Bituminous Rubber Tire Roller; Bobcat/Skid Steer Loader up to 1 cu yd; Loader up to 1 cu yd (Excluding Sewer & Water lines); Tractor 50 hp or less; Bulldozer 50 hp or less.

GROUP 6: Oiler, Crane Oiler

CRANE OVER 135' BOOM, EXCLUDING JIB - $ .25 PREMIUM; CRANE OVER 200' BOOM, EXCLUDING JIB - $ .50 PREMIUM

UNDERGROUND WORK: UNNELS, SHAFTS, ETC. - $ .25 PREMIUM UNDER AIR PRESSURE - $ .50 PREMIUM

HAZARDOUS WASTE PROJECTS (PPE Required): LEVEL A - $1.25 PREMIUM LEVEL B - $ .90 PREMIUM LEVEL C - $ .60 PREMIUM

---------------------------------------------------------------- * IRON0512-012 05/01/2015

BIG STONE, CHIPPEWA, COTTONWOOD, GRANT, JACKSON, KITTSON, LAC QUI PARLE, LINCOLN, LYON, MURRAY, NOBLES, OTTERTAIL, PIPESTONE,POPE, REDWOOD, ROCK, STEVENS, SWIFT, TRAVERSE, YELLOW MEDICINE

Rates Fringes

IRONWORKER, STRUCTURAL AND REINFORCING......................$ 35.50 23.45 ---------------------------------------------------------------- * IRON0512-027 05/01/2015

MARSHALL, NORMAN, PENNINGTON, RED LAKE, ROSEAU, WILKIN

Rates Fringes

IRONWORKER, STRUCTURAL AND REINFORCING......................$ 31.04 23.45 ---------------------------------------------------------------- LABO0132-037 05/01/2012

Rates Fringes

LABORER (LANDSCAPE)..............$ 17.49 12.10 ---------------------------------------------------------------- LABO0132-043 05/01/2012

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COTTONWOOD, JACKSON, LAC QUI PARLE, LINCOLN, LYON, MURRAY, NOBLES, PIPESTONE, REDWOOD, ROCK, AND YELLOW MEDICINE COUNTIES

Rates Fringes


BIG STONE, CHIPPEWA, GRANT, OTTER TAIL, POPE, STEVENS, SWIFT, AND TRAVERSE COUNTIES

Rates Fringes

LABORERS (2) Mason Tender - Cement/Concrete.............$ 20.20 13.88 (6) Pipelayer (Excluding Sewer & Water Lines)........$ 22.50 13.88 ---------------------------------------------------------------- LABO0563-050 05/01/2014

BIG STONE, CHIPPEWA, GRANT, OTTER TAIL, POPE, STEVENS, SWIFT, TRAVERSE, AND WILKIN COUNTIES

Rates Fringes


KITTSON, MARSHALL, NORMAN, PENNINGTON, RED LAKE, AND ROSEAU COUNTIES

Rates Fringes

LABORERS (2) Mason Tender - Cement/Concrete.............$ 20.20 13.88 (6) Pipelayer (Excluding Sewer & Water Lines)........$ 22.50 13.88 ---------------------------------------------------------------- LABO1097-012 05/01/2014

KITTSON, MARSHALL, NORMAN, PENNINGTON, RED LAKE, AND ROSEAU COUNTIES

Rates Fringes

LABORER (LANDSCAPE)..............$ 20.00 13.88 ---------------------------------------------------------------- SUMN2009-090 09/28/2009

Rates Fringes

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LABORER: Common or General (Excludes Water & Sewer Lines)...$ 15.58 5.67

TRUCK DRIVER: Straight Truck....$ 16.05 0.00

WATER & SEWER LINES: Laborer, Common or General.......$ 13.66 5.92

WATER & SEWER LINES: Laborer, Pipelayer...............$ 15.63 5.92

WATER & SEWER LINES: Operator - Loader/Front End Loader...........................$ 17.56 7.55 ----------------------------------------------------------------

WELDERS - Receive rate prescribed for craft performing operation to which welding is incidental.

================================================================

Unlisted classifications needed for work not included within the scope of the classifications listed may be added after award only as provided in the labor standards contract clauses (29CFR 5.5 (a) (1) (ii)).

----------------------------------------------------------------

The body of each wage determination lists the classification and wage rates that have been found to be prevailing for the cited type(s) of construction in the area covered by the wage determination. The classifications are listed in alphabetical order of "identifiers" that indicate whether the particular rate is a union rate (current union negotiated rate for local), a survey rate (weighted average rate) or a union average rate (weighted union average rate).

Union Rate Identifiers

A four letter classification abbreviation identifier enclosed in dotted lines beginning with characters other than "SU" or "UAVG" denotes that the union classification and rate were prevailing for that classification in the survey. Example: PLUM0198-005 07/01/2014. PLUM is an abbreviation identifier of the union which prevailed in the survey for this classification, which in this example would be Plumbers. 0198 indicates the local union number or district council number where applicable, i.e., Plumbers Local 0198. The next number, 005 in the example, is an internal number used in processing the wage determination. 07/01/2014 is the effective date of the most current negotiated rate, which in this example is July 1, 2014.

Union prevailing wage rates are updated to reflect all rate changes in the collective bargaining agreement (CBA) governing this classification and rate.

Page 5 of 7


Survey Rate Identifiers

Classifications listed under the "SU" identifier indicate that no one rate prevailed for this classification in the survey and the published rate is derived by computing a weighted average rate based on all the rates reported in the survey for that classification. As this weighted average rate includes all rates reported in the survey, it may include both union and non-union rates. Example: SULA2012-007 5/13/2014. SU indicates the rates are survey rates based on a weighted average calculation of rates and are not majority rates. LA indicates the State of Louisiana. 2012 is the year of survey on which these classifications and rates are based. The next number, 007 in the example, is an internal number used in producing the wage determination. 5/13/2014 indicates the survey completion date for the classifications and rates under that identifier.

Survey wage rates are not updated and remain in effect until a new survey is conducted.

Union Average Rate Identifiers

Classification(s) listed under the UAVG identifier indicate that no single majority rate prevailed for those classifications; however, 100% of the data reported for the classifications was union data. EXAMPLE: UAVG-OH-0010 08/29/2014. UAVG indicates that the rate is a weighted union average rate. OH indicates the state. The next number, 0010 in the example, is an internal number used in producing the wage determination. 08/29/2014 indicates the survey completion date for the classifications and rates under that identifier.

A UAVG rate will be updated once a year, usually in January of each year, to reflect a weighted average of the current negotiated/CBA rate of the union locals from which the rate is based.

----------------------------------------------------------------

WAGE DETERMINATION APPEALS PROCESS

1.) Has there been an initial decision in the matter? This can be:

* an existing published wage determination * a survey underlying a wage determination * a Wage and Hour Division letter setting forth a position on a wage determination matter * a conformance (additional classification and rate) ruling

On survey related matters, initial contact, including requests for summaries of surveys, should be with the Wage and Hour Regional Office for the area in which the survey was conducted because those Regional Offices have responsibility for the Davis-Bacon survey program. If the response from this initial contact is not satisfactory, then the process described in 2.) and 3.) should be followed.

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With regard to any other matter not yet ripe for the formal process described here, initial contact should be with the Branch of Construction Wage Determinations. Write to:

Branch of Construction Wage Determinations Wage and Hour Division U.S. Department of Labor 200 Constitution Avenue, N.W. Washington, DC 20210

2.) If the answer to the question in 1.) is yes, then an interested party (those affected by the action) can request review and reconsideration from the Wage and Hour Administrator (See 29 CFR Part 1.8 and 29 CFR Part 7). Write to:

Wage and Hour Administrator U.S. Department of Labor 200 Constitution Avenue, N.W. Washington, DC 20210

The request should be accompanied by a full statement of the interested party's position and by any information (wage payment data, project description, area practice material, etc.) that the requestor considers relevant to the issue.

3.) If the decision of the Administrator is not favorable, an interested party may appeal directly to the Administrative Review Board (formerly the Wage Appeals Board). Write to:

Administrative Review Board U.S. Department of Labor 200 Constitution Avenue, N.W. Washington, DC 20210

4.) All decisions by the Administrative Review Board are final.

================================================================

END OF GENERAL DECISION

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This Page Left Blank Intentionally

General Decision Number: MN150066 05/22/2015 MN66

Superseded General Decision Number: MN20140066

State: Minnesota

Construction Type: Building

County: Otter Tail County in Minnesota.

BUILDING CONSTRUCTION PROJECTS (does not include single family homes or apartments up to and including 4 stories).

Note: Executive Order (EO) 13658 establishes an hourly minimum wage of $10.10 for 2015 that applies to all contracts subject to the Davis-Bacon Act for which the solicitation is issued on or after January 1, 2015. If this contract is covered by the EO, the contractor must pay all workers in any classification listed on this wage determination at least $10.10 (or the applicable wage rate listed on this wage determination, if it is higher) for all hours spent performing on the contract. The EO minimum wage rate will be adjusted annually. Additional information on contractor requirements and worker protections under the EO is available at www.dol.gov/whd/govcontracts.

Modification Number Publication Date 0 01/02/2015 1 03/27/2015 2 05/22/2015

BOIL0647-001 01/01/2013

Rates Fringes

BOILERMAKER......................$ 32.40 25.37 ---------------------------------------------------------------- BRMN0015-001 05/01/2014

Rates Fringes

BRICKLAYER.......................$ 31.13 16.54 ---------------------------------------------------------------- CARP0606-016 06/01/2009

Rates Fringes

CARPENTER (Including Acoustical Ceiling Installation, Drywall Hanging, Form Work and Metal Stud Installation)...............$ 20.57 13.23 ---------------------------------------------------------------- ELEC1426-003 06/01/2014

Rates Fringes

ELECTRICIAN......................$ 27.59 11.5%+8.20 ----------------------------------------------------------------

Page 1 of 6


ELEV0009-004 01/01/2015

Rates Fringes

ELEVATOR MECHANIC................$ 44.93 28.385

FOOTNOTE: PAID VACATION: Employer contributes 8% of regular hourly rate as vacation pay credit for employees with more than 5 years of service, and 6% for 6 months to 5 years of service. PAID HOLIDAYS: New Years Day, Memorial Day, Independence Day, Labor Day, Veterans Day, Thanksgiving Day, Friday after Thanksgiving, and Christmas Day.

---------------------------------------------------------------- * ENGI0049-051 05/01/2015

Rates Fringes

OPERATOR: Power Equipment GROUP 1.....................$ 35.85 17.15 GROUP 2.....................$ 35.53 17.15 GROUP 3.....................$ 34.20 17.15 GROUP 4.....................$ 33.88 17.15 GROUP 5.....................$ 33.72 17.15 GROUP 6.....................$ 32.30 17.15 GROUP 7.....................$ 31.24 17.15 GROUP 8.....................$ 29.35 17.15

POWER EQUIPMENT OPERATOR CLASSIFICATIONS

GROUP 1: Truck & Crawler Crane with 200' of Boom & Over, including Jib ($.50 premium with 300' of Boom & over, including jib); & Tower Crane 250' & Over.

GROUP 2: Truck & Crawler Crane with 150' of Boom, up to but not including 200' of Boom, including Jib; & Tower Crane 200' & Over.

GROUP 3: Traveling Tower Crane; Truck & Crawler Crane, up to but not including 150' of Boom, including Jib; Tower Crane (Stationary) up to 200'; All-Terrain Vehicle Crane.

GROUP 4: Backhoe/Track/Trackhoe, Hoist (3 drums or more); Overhead Crane (inside building perimeter).

GROUP 5: Asphalt Spreader, Bulldozer, Forklift, Compressor 450 CFM or over (2 or more machines); Hoist (1 or 2 drums); Roller, Scraper, Tractor over D2.

GROUP 6: Bobcat/Skid Loader, Tractor D2 or similar size.

GROUP 7: Crane Oiler.

GROUP 8: Oiler, Greaser (Tractor/Truck).

---------------------------------------------------------------- * IRON0512-005 05/01/2015

Rates Fringes

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IRONWORKER, ORNAMENTAL, REINFORCING, AND STRUCTURAL......$ 35.50 23.45 ---------------------------------------------------------------- LABO0563-016 05/01/2012

Rates Fringes

Laborers: (1) Mason Tender (Brick)....$ 20.21 14.97 (2) Pipelayer...............$ 20.96 14.97

PROJECTS OVER $950,000: $1.75 additional per hour. ---------------------------------------------------------------- LABO0563-034 05/01/2012

Rates Fringes

LABORER (LANDSCAPE)..............$ 17.49 12.10 ---------------------------------------------------------------- PAIN0884-013 06/01/2010

Rates Fringes

PAINTER (Brush & Roller).........$ 24.16 13.31

PROJECTS UNDER $8,000: Rate is 80% of basic hourly rate.

PAINTER'S PREMIUM - $0.75 per hour additional for the following: Two Component Paints; Epoxies; Sandblasting & Rigging; Work done on Swing Scaffolding, Safety Harness, Window Jacks, Boatswain's Chair, Coverings & Erection of Scaffolding for same; Work on Erected Structural Steel & Abrasive Blasting

---------------------------------------------------------------- PLUM0011-010 05/01/2012

Rates Fringes

PLUMBER/PIPEFITTER...............$ 30.15 13.33 ---------------------------------------------------------------- ROOF0096-032 06/01/2012

Rates Fringes

ROOFER...........................$ 28.95 14.90 ---------------------------------------------------------------- SHEE0010-013 05/01/2010

Rates Fringes

SHEET METAL WORKER (HVAC Duct and System Installation only)....$ 32.10 17.15 ---------------------------------------------------------------- SUMN2009-020 07/27/2009

Rates Fringes

CEMENT MASON/CONCRETE FINISHER...$ 14.31 1.45

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LABORER: Common or General......$ 10.50 1.50

LABORER: Mason Tender - Cement/Concrete..................$ 12.70 3.89

LABORER: Roof Tearoff...........$ 10.42 2.08

OPERATOR: Excavator.............$ 17.64 2.97

OPERATOR: Loader................$ 15.50 1.56

OPERATOR: Mechanic..............$ 19.74 4.47

PAINTER: Spray..................$ 17.98 4.47

SHEET METAL WORKER, Excludes HVAC Duct and Unit Installation.....................$ 16.73 4.86

TRUCK DRIVER: Dump Truck........$ 13.92 1.08 ----------------------------------------------------------------

WELDERS - Receive rate prescribed for craft performing operation to which welding is incidental.

================================================================

Unlisted classifications needed for work not included within the scope of the classifications listed may be added after award only as provided in the labor standards contract clauses (29CFR 5.5 (a) (1) (ii)).

----------------------------------------------------------------

The body of each wage determination lists the classification and wage rates that have been found to be prevailing for the cited type(s) of construction in the area covered by the wage determination. The classifications are listed in alphabetical order of "identifiers" that indicate whether the particular rate is a union rate (current union negotiated rate for local), a survey rate (weighted average rate) or a union average rate (weighted union average rate).

Union Rate Identifiers

A four letter classification abbreviation identifier enclosed in dotted lines beginning with characters other than "SU" or "UAVG" denotes that the union classification and rate were prevailing for that classification in the survey. Example: PLUM0198-005 07/01/2014. PLUM is an abbreviation identifier of the union which prevailed in the survey for this classification, which in this example would be Plumbers. 0198 indicates the local union number or district council number where applicable, i.e., Plumbers Local 0198. The next number, 005 in the example, is an internal number used in processing the wage determination. 07/01/2014 is the effective date of the

Page 4 of 6


most current negotiated rate, which in this example is July 1, 2014.

Union prevailing wage rates are updated to reflect all rate changes in the collective bargaining agreement (CBA) governing this classification and rate.

Survey Rate Identifiers

Classifications listed under the "SU" identifier indicate that no one rate prevailed for this classification in the survey and the published rate is derived by computing a weighted average rate based on all the rates reported in the survey for that classification. As this weighted average rate includes all rates reported in the survey, it may include both union and non-union rates. Example: SULA2012-007 5/13/2014. SU indicates the rates are survey rates based on a weighted average calculation of rates and are not majority rates. LA indicates the State of Louisiana. 2012 is the year of survey on which these classifications and rates are based. The next number, 007 in the example, is an internal number used in producing the wage determination. 5/13/2014 indicates the survey completion date for the classifications and rates under that identifier.

Survey wage rates are not updated and remain in effect until a new survey is conducted.

Union Average Rate Identifiers

Classification(s) listed under the UAVG identifier indicate that no single majority rate prevailed for those classifications; however, 100% of the data reported for the classifications was union data. EXAMPLE: UAVG-OH-0010 08/29/2014. UAVG indicates that the rate is a weighted union average rate. OH indicates the state. The next number, 0010 in the example, is an internal number used in producing the wage determination. 08/29/2014 indicates the survey completion date for the classifications and rates under that identifier.

A UAVG rate will be updated once a year, usually in January of each year, to reflect a weighted average of the current negotiated/CBA rate of the union locals from which the rate is based.

----------------------------------------------------------------

WAGE DETERMINATION APPEALS PROCESS

1.) Has there been an initial decision in the matter? This can be:

* an existing published wage determination * a survey underlying a wage determination * a Wage and Hour Division letter setting forth a position on a wage determination matter * a conformance (additional classification and rate) ruling

On survey related matters, initial contact, including requests

Page 5 of 6


for summaries of surveys, should be with the Wage and Hour Regional Office for the area in which the survey was conducted because those Regional Offices have responsibility for the Davis-Bacon survey program. If the response from this initial contact is not satisfactory, then the process described in 2.) and 3.) should be followed.

With regard to any other matter not yet ripe for the formal process described here, initial contact should be with the Branch of Construction Wage Determinations. Write to:

Branch of Construction Wage Determinations Wage and Hour Division U.S. Department of Labor 200 Constitution Avenue, N.W. Washington, DC 20210

2.) If the answer to the question in 1.) is yes, then an interested party (those affected by the action) can request review and reconsideration from the Wage and Hour Administrator (See 29 CFR Part 1.8 and 29 CFR Part 7). Write to:

Wage and Hour Administrator U.S. Department of Labor 200 Constitution Avenue, N.W. Washington, DC 20210

The request should be accompanied by a full statement of the interested party's position and by any information (wage payment data, project description, area practice material, etc.) that the requestor considers relevant to the issue.

3.) If the decision of the Administrator is not favorable, an interested party may appeal directly to the Administrative Review Board (formerly the Wage Appeals Board). Write to:

Administrative Review Board U.S. Department of Labor 200 Constitution Avenue, N.W. Washington, DC 20210

4.) All decisions by the Administrative Review Board are final.

================================================================

END OF GENERAL DECISION

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SECTION 44 41 30

REVISED FILTER REHABILITATION & MODIFICATION (06/01/15)

PART 1 GENERAL

1.01 SUMMARY

A. Section Includes: 1. Removal of filter media and support gravels. 2. Removal of existing backwash collection troughs 3. Installation of new backwash collection troughs 4. Filter wall modifications (extensions) 5. Conduct inspection and maintenance procedure of underdrain system 6. Installation of new Filter media 7. Miscellaneous water treatment facility modifications 8. Start-up and testing of system

B. Design summary:

1. Sequential rehabilitation of two (2) Gravity filer units a. North Filters:

1) Steel Gravity Filter. 2) 2 filter bays (filter 1 and filter 2).

a) 3-filter cells per bay (6-total). b) Filter cell area: 48 square feet each +/-, 288 SF total for filters 1&2.

3) Original underdrain system previously replaced with monolithic concrete underdrain. b. South Filters:

1) 2 filter bays (filter 3 and filter 4). a) 3-filter cells per bay (6-total). b) Filter cell area: 48 square feet each +/-, 288 SF total for Filters 3&4.

2. Existing media: a. As described in drawings, verify in field.

3. New media: a. Replace as described below.

C. Not Included in this Section:

1. Filter disinfection (refer to Section 33 16 30). 1.02 REFERENCES

A. MDH regulations on public water supplies, Chapter 472

B. Recommended Standards for Water Works “Ten State Standards”, 1997 Edition 1.03 SUBMITTALS

A. Refer to Section 01 33 00.

B. Shop Drawings: Indicate system schematics, equipment locations, details, and control schematics.

C. Product Data: Submit manufacturer’s Product Data indicating materials, filter media other components.

D. Submit reports in accordance with Section 01 75 00 and include: 1. Report indicating start-up of treatment system is completed and operating properly. 2. Report indicating analysis of system water after treatment. 3. Report indicating analysis of iron & manganese results after filtration.

Revised Filter Rehabilitation & Modification (06/01/15) PELIC 131212 44 41 30 - 1

E. Operation and Maintenance Manuals: Prior to start-up, furnish operation and maintenance manuals in accordance with Section 01 78 23.

1.04 DEFINITIONS

A. NSF - NSF International, Ann Arbor, MI

B. ASTM: American Society for Testing and Materials

C. AWWA: American Water Works Association

D. CFM Cubic feet per minute

E. GPM: Gallons per minute

F. MSS Manufacturers Standardization Society

G. PPM: Parts per million 1.05 METHOD OF MEASUREMENT AND BASIS OF PAYMENT

A. Basis of Payment: 1. All work and costs in this section shall be incidental to the project and included in the Lump Sum

Bid.

1.06 QUALITY ASSURANCE

A. Single Source Responsibility: Provide equipment by 1 supplier.

B. Regulatory Requirements: Materials and equipment provided in this Section shall comply with the recommended practices and standards of NSF International.

1.07 WARRANTY

A. All equipment, unless otherwise stated, shall be warranted by the manufacturer for 1 year from the date of start-up.

PART 2 PRODUCTS

2.01 GENERAL

A. Use common components to the greatest degree possible to simplify spare parts inventory and service.

2.02 FILTER MEDIA

A. The filter media shall be washed and graded material meeting the requirements of AWWA B100.

B. The filter media furnished and installed under this section shall be an integral part of a dual media gravity filter system suitable for the removal of iron oxides from an aerated well water supply.

C. A dual media filter bed system shall be provided for average day filtration rates of 2.6

gallons/minute/square foot of filter bed area and maximum design rates of 4.0.

D. Filter media shall be of a depth sufficient to provide uniform dispersion of backwash water and air without channeling or excessive wall up flow velocities across the entire cell area.

Revised Filter Rehabilitation & Modification (06/01/15) 44 41 30 - 2 PELIC 131212

E. The filter media shall consist of: 1. Graded Support Gravels

a. Depth: 6-inches or as recommended by filter equipment manufactured for use with proposed filter media and air wash piping.

2. Silica Sand: a. 18-inch depth. b. Suitable for the use in a potable water supply filter. c. Sand shall be free of shale, mica, clay, dirt and organic impurities. d. Effective size of 0.45 to 0.55. e. And uniformity coefficient not to exceed 1.55.

F. Anthracite cap 1. 12-inch depth 2. Effective size of 0.8 -1.0 mm 3. Uniformity coefficient not to exceed 1.65. 4. The anthracite shall be of highest quality and shall be shipped in bags and palletized.

G. The sand and anthracite shall be provided in quantities exceeding actual requirements by ten percent

over and above hydraulic graduation and manual scalping.

2.03 AIR WASH SYSTEM

A. Airwash Grid 1. The airwash system shall be a header/lateral system located at the media/gravel interface for

complete scouring of filtration media. 2. Air header pipes shall generally enter the filter cells at the media/gravel interface elevation. 3. Materials.

a. The system construction shall be Sch. 80 PVC pipe and fittings with headers being supported at not greater than 4 ft. intervals using stainless steel U-bolts, steel angles, and stainless steel anchorage.

b. Laterals shall be shop fabricated from Sch. 80 PVC, minimum 3/4” diameter and solvent welded in place by the installing contractor.

c. Laterals shall be evenly spaced at not more than 12” lateral to lateral spacing along the entire length of the header, each side.

d. Laterals shall be supported at not greater than 2’ intervals using steel angles, vertical supports, base plates, and stainless steel anchorage.

e. Supports shall be adjustable in two directions. 4. Lateral Design.

a. Each lateral shall be secured using a double wrap at each support with polypropylene ties, two required per lateral.

b. Each lateral shall be fitted with an end cap and a specially machined Sch. 80 male adapter for screwing or solvent welding into the airwash header.

c. A specially sized air metering slot shall be placed parallel to the axis of the lateral at 6” intervals.

d. Multiple slots and slots that are cut perpendicular to the axis of the lateral are not considered equal and are not allowed due to the potential for weakening of the lateral, leading to failure under typical operating conditions.

e. Each slot shall be installed at a 45-defree angle, alternating from the vertical axis of the installed airwash lateral.

f. The slots shall be water jet cut. g. The slot width and length shall be designed to reject all media it comes in contact with. h. The slots shall allow the proper range of air per square foot of area, based on operating

conditions. 5. Configuration.

a. The system used shall be the specified airwash grid, or engineer approved equal. b. Substitute systems shall be of rigid pipe construction. c. Systems utilizing multiple penetrations into the filter cells shall be prohibited due to the high

potential for hydraulic short circuiting.


d. Systems utilizing flexible piping or hoses (rubber, polyethylene, polypropylene, etc.) shall be prohibited due to their inherent movement in the filtration bed and their inability to remain rigid during normal filter operation.

e. Calculations verifying adequate air distribution design including orifice headloss calculations, shall be submitted to the engineer for approval upon request.

2.04 COMBINED AIR/WATER BACKWASH COLLECTION SYSTEM:

A. Combined air/water backwash trough shall be installed in each of the filter cells: 1. Install in the configuration as recommended by the providing manufacturer 2. Provide specific design to accept a sustained simultaneous air/water backwash flow without loss

of media and without inhibiting the removal of suspended solids. 3. Sustained is defined as a single duration greater than 10 minutes at specified air and water rates

achieving a collapse-pulse action while backwash water flows into the trough.

B. Simultaneous air/water backwash collection troughs 1. Constructed of 10 gauge or heavier Type 304 stainless steel. 2. All mounting hardware shall be stainless steel. 3. Provide required stainless steel mounting system for connection to the center concrete collection

trough shown on the Drawings.

C. Design requirements 1. Accept up to 3 cfm/sf of air and 5 gpm/sf2 of water during the combined air-water backwash

mode and up to 20 gpm/ft2 of backwash water without air. 2. Adjustable weir edges along the entire length of trough to allow for equal distribution and

collection of water. 3. Weir edge shall be adjustable via corner set screws to correct for small deviations in elevations

that may be due to installation inconsistencies. 4. The combined air/water backwash collection troughs shall be of the overflow type without deep,

overlapping baffles and shall include a quiescent zone for media/solids separation and a return chute for continuous return of settled media to the filter bed. Filter backwashing with water only, air followed by water, or combined air and water for short periods of time as limited by filter geometry (freeboard combined air/water backwash using upturned elbows) shall not be acceptable.

5. Lateral stiffness and rigidity shall be provided along each trough and fastened with stainless steel hardware. A molded in place water stop shall be provided on the discharge end of each trough. The back end of all the troughs shall have a welded closed plate end hanger system.

6. Care shall be exercised in fabrication and installation to maintain edges of the troughs level and straight without more than± 1/8-inch variation from level throughout the entire length of the trough.

7. Excessive defections shall be cause for rejection of troughs.

D. Loadings: The troughs shall be designed to support, within stress and deflection limitation, the following loadings: 1. Gravity Load - Downward vertical loads shall include the weight of the trough and appurtenant

attachments, such as weir plates and the spreader bars, together with the weight of water to fill the trough. Additional loads, such as air piping, etc., shall also be considered.

2. Buoyant Load - The buoyant load shall act vertically upward, its magnitude equal to the weight of displaced water (trough weight neglected). The line of action passes through the centroid of the submerged cross-sectional area.

3. Lateral Load - Loads acting against the trough side walls; specifically, those induced by differential water levels on either side of the trough walls. The maximum possible differential, existing when the trough is empty and the filter is full, or when the trough is full and when the filter is empty, shall be used when calculating deflection.

4. Torsional Stability - The trough system shall be designed to resist torsional oscillations induced by the flow of water over trough edges.

E. Backwash collection system shall guarantee media loss of one inch per year or less.


2.05 AIRWASH BLOWER AND ACCESSORIES

A. General Requirements: 1. Acceptable Manufacturers:

a. GE Oil & Gas EasyAir X2 factory designed package blower system. b. “Or equal” models submitted and approved in accordance with Section 01 25 13.

2. The Contractor shall furnish, install, and place in satisfactory operation in the manner shown on the Drawings a two lobe rotary positive displacement air blower with sound enclosure.

3. All equipment specified in this section shall be designed and furnished by the blower manufacturer, who shall be responsible for the suitability and compatibility of all included equipment. The blower/motor assemblies, all accessories, controls and other accessories shall be supplied by a single manufacturer who is fully experienced, reputable and qualified in the supply of the equipment specified. The manufacturer of the blower shall have at least ten (10) installations the rotary lobe blower in operation for at least five years.

4. Blower performance shall be calculated according to the manufacturer's published standards based upon the conditions existing at the blower inlet flange, considering any temperature rise and pressure drop within the enclosure and within the silencers.

5. Complete calculations, including published manufacture's data, will be required as part of the shop drawing submittal.

6. The air blower shall be of the two lobe rotary positive displacement type, and shall be constructed with inlet and discharge connections oriented as shown on the contract drawings. Each blower shall be equipped with detachable rugged steel mounting feet for mounting in horizontal configuration.

B. Testing: 1. 1 PSI slip test shall be performed on each blower to verify flow within +/-5%. Blower

manufacture’s certification shall be provided. 2. A package mechanical run test at contract speed and pressure shall be performed on each

blower. Blower manufacture’s certification shall be provided. 3. A package noise certified readings which includes the mechanical run test and calculated to a

free field environment. The test to be measured to ISO 2151-2004 (E), sound pressure level only, test code with +/- 3 dBa tolerance. Blower manufacture’s certification shall be provided.

C. Design Conditions: 1. Blower Type: dual-lobe, splash lubricated. 2. Blower Capacity: 500 scfm at a discharge pressure of 7.5 psig. 3. Secondary Operating Point 350 scfm at a discharge pressure of 10 psig. 4. Motor: Inverter Duty for use with a VFD. VFD will be used to achieve secondary condition. 5. Elevation Above Sea Level: 1355 ft. 6. Max Inlet Temperature: 110° F. 7. Minimum Inlet Temperature: -30° F. 8. Ambient Room Temperature: 70° F.

D. Construction:

1. Casing: The blower casing shall be one piece, with separate head plates, and shall be made of ASTM A48 Class 30B close-grained cast iron. Each head plate shall incorporate a vent to atmosphere. In a pressure application this vent prevents pressurization of the oil chambers. In a vacuum application the vent prevents potential oil carry over to the air stream.

2. Impellers: Each impeller shall be made from high-strength cast iron, ASTM A48 Class 30B. The impellers shall be of the straight, two-lobe involute type, and shall operate without rubbing, liquid seals or lubrication. The assembly shall be dynamically balanced by removing metal from the impeller body, and shall be center-timed to permit rotation in either direction.

3. Shafts: The blower shafts shall be ASTM 108-90 and 311-90 or equal. The shafts shall be pressed through the impeller body with an interference fit, and pinned in place.

4. Bearings: Each impeller and shaft assembly shall be supported by oversized anti-friction bearings engineered for long service life and fixed to control the axial location of the impeller/shaft in the unit. A cylindrical roller bearing shall be provided at the drive shaft designed to handle the load of v-belt drive, while single-row ball bearings shall be used at all other locations.


5. Timing Gears: The impellers shall be timed by a pair of SAE 8620 carburized and ground steel spur gears. The gears shall be hardened to 58-62 Rockwell hardness and mounted on the shafts with a tapered fit and secured by a locknut.

6. Fasteners: High strength fasteners shall be used. 7. Lubrication: Each bearing housing shall include a positive radial lip type Viton oil seal. A Buna N

lip seal shall be installed on the drive end of the drive shaft. The drive end bearings shall be splash oil lubricated. The timing gears and the gear end bearings shall be lubricated by splash from the gears dipping into the oil.

8. The blower will be a ROOTS URAI-DSL as manufactured by GE Oil & Gas or approved equal.

E. Inlet Silencer: 1. System shall include an inlet filter silencer for pressure applications. An inlet flexible connector

with clamps shall be used to mount the inlet filter silencer to the blower inlet connection. The inlet filter silencer shall be carbon steel with paper filter elements.

2. Inlet filters shall have front access for element access. Filter shall provide 99% removal efficiency of 2 micron particle size and larger. Vacuum filters, if required, to be installed inside of the noise enclosure. GE Oil & Gas shall supply the inlet filter silencer

F. Accessories: 1. Oil fill container with a blower oil drain manifold. 2. The blower package shall include pressure/vacuum gauges on either the suction or discharge of

the blower. Gauges shall be mounted on the noise enclosure. All gauges shall be supplied by GE Oil & Gas as manufactured by Ashcroft model 1009SW with 2.5” dial.

3. The blower package will include a discharge temperature gauge mounted on the noise enclosure. The discharge temperature gauge shall be supplied by GE Oil & Gas as manufactured by Weiss model 25UB3-5131 with 2.5” dial.

4. Blower package shall include an inlet filter differential pressure gauge mounted on the noise enclosure to indicate filter change requirement. The inlet filter gauge shall be supplied by GE Oil & Gas as manufactured by Dwyer model 2-5040 Minihelic II with 2.5” dial.

5. A spring type large nozzle design bronze relief valve shall be included. The relief valve shall be mounted in the discharge silencer for pressure applications and in the suction piping on blowers for vacuum application. The relief valve shall be supplied by GE Oil & Gas as manufactured by Kunkle model 337 for pressure service and 215V for vacuum service.

6. Check valves shall be supplied for pressure and vacuum applications. The check valve shall have plain end connections for 5” diameter and below. 6” through 10” are MNPT and 12” will be wafer. Check valve shall be split disc type and valve body shall be cast iron or carbon steel with silicone seal. Check valve ratings shall be 200 PSIG and 500° F. The blower manufacturer must insure the valve is suitable for the application. Check valve to be supplied by GE Oil & Gas as manufactured by Flexi-Hinge.

7. Vibration mounts shall be supplied and capable of leveling the blower package to insure proper oil level to increase service and longevity of the equipment. Vibration mounts to be supplied by GE Oil & Gas. The blower manufacture must insure proper selection for the specific blower system offered.

8. An 85 dBA or less free field guaranteed noise enclosure should be provided for each blower system. The enclosure outer material must be zinc coated steel with a surface preparation and paint as follows: Powder coat with texture finish 40-100 microns (65 microns average) RAL 5015 blue powder coat process to be proven to pass 500 hour salt spray test satisfactory with no rust evidence. The enclosure must be suitable for outdoor installation, 20 lb per square foot snow load and 70 MPH wind speed. The enclosure shall include a vent system and (3) removable panels for easy access and maintenance. The ventilation fan shall be mounted on blower drive shaft; separately wired electric enclosure fans are not acceptable. The noise enclosure shall be provided with 1” foam and the foam shall comply with UL94-HF 1 for flammability.

2.06 MANUFACTURERS & SUPPLIERS

A. Acceptable Filter rehabilitation & modification equipment manufacturing & equipment suppliers: 1. Treatment Resources, 11670 Fountains Drive Suite 200, Minneapolis, MN 55369, Phone

612.201.5630, www. treatmentresources.com.


2. Tonka Water, 13305 Water Tower Cir, Plymouth, MN 55441, Phone: 763.252.0883, www.tonkawater.com.

PART 3 EXECUTION

3.01 INSTALLATION

A. Comply with manufacturer’s Product Data, including installation instructions and details.

B. Provide at least 1 day of installation supervision by the manufacturer’s representative. 3.02 GENERAL

A. All filter equipment shall be installed as recommended by the equipment/material manufacturer and Engineer.

B. Rehabilitation of each filter system will be unique, the following guidelines should be considered

1. Refer to section 09 97 20 for rehabilitation instructions related to protective coatings 2. Steel filter system will require the removal of existing insulation and protective tin layer.

3.03 REMOVAL OF EXISTING FILTER MEDIA & SUPPORT GRAVELS

A. Filter media and support gravels shall be completely removed from the filter vessels using vacuum methods.

B. Vacuum clean underdrain systems

3.04 UNDERDRAIN INSPECTION & CLEANING

A. After removal of existing media provide labor all and materials to conduct a thorough cleaning procedure prior to inspection & testing 1. Flush ensure filter cell with water to clean underdrain grid 2. Powerwash all filter interior surfaces 3. Make each filter cell available for inspection by engineer

B. Inspection & Testing 1. Upon completion of cleaning procedures initiate inspection time with Engineer 2. During Inspection, coordinate flow testing through underdrain nozzles to assure proper function 3. Replace damaged or nonfunctioning nozzles identified during inspection with new nozzles

available from City spare stock. 4. Proceed with filter rehabilitation work after cleaning, testing, inspection & repair is complete.

3.05 PAINTING

A. Replace all coatings on interior steel components using the materials and procedures specified in 09 97 20.

3.06 CLEANING

A. Each filter cell shall be cleaned thoroughly before any filter materials are placed and shall be kept clean throughout placement operations.

3.07 MEDIA INSTALLATION

A. Prepare filter and install media in accordance with applicable provisions of AWW A B100 and these Specifications.

B. Storage:


1. Contractor shall not store filter media. Filter media shall be ordered when the facility is ready and placement shall occur immediately upon delivery.

C. Preparation:

1. Marking Each Layer - Before any materials are placed, the top elevation of each layer shall be marked by a continuous level line on the sides of the filter.

D. Placement:

1. The bottom layer of media shall be placed carefully to avoid damage to the filter underdrain system. Workmen shall not stand or walk directly on the installed filter material. They shall walk on boards of plywood that will sustain their weight without displacing the material.

2. Bulk materials may be placed dry by using a chute or conveyor to discharge the materials onto a platform from where they may be scattered with a hard shovel.

3. Bagged materials may be placed in the filter by scattering the material directly from the bags. Caution should be observed to ensure that the fibers from the bags do not fall into the filter media. Each layer of material shall be installed and leveled before the next layer is installed.

4. Top surface elevation of the filter material after initial washing shall have an elevation equal to the finished elevation plus the thickness of material to be removed by scraping. To provide for initial expansion of the bed due to segregation of particle sizes, the top surface, before washing, shall be approximately 10 percent of the bed thickness below finished elevation.

5. To avoid the removal of an excessive amount of material by scraping, which may result in a coarser filter than was intended, no material shall be placed in the filter in excess of that necessary to produce the finished surface elevation.

6. Any filter material that becomes dirty or contaminated shall be removed and replaced with clean material of the proper size and type.

E. Preparation for Service

1. Washing: a. Backwashing and skimming operations are required after placement the support gravels and

after placement of each layer of filter before the following layer of filter media may be placed. b. Once a layer is placed and prior to the placement of the subsequent layer, the filter cells

washwater shall be slowly admitted upward through the underdrain system until the entire bed is flooded. Backwashing shall begin and the wash rate shall be increased gradually to remove air from the underdrain and bed.

c. During each backwash, the water shall be applied at an initial rate of 2 gpm/sq.ft. of filter area; the backwash rate shall then be increased gradually over a period of 15 minutes to a maximum of 12 gpm/sq.ft.

2. Scraping: a. After the initial wash for each layer of filter material, a layer of fine material approximately

3/16 inch thick shall be removed from the surface of the filter by scraping. b. The scraping operation shall be repeated as many times as necessary to remove virtually all

material passing a No. 50 sieve. c. The filter shall be washed at least 3 times between scrapings. Each wash shall be at least 5

minutes in duration and shall be at a rate of at least 15 gpm/sq.ft. d. The minimum effort for this work is to make 3 back-washings and scrapings per filter cell.

However, this process shall be repeated as many times as necessary to ensure all of the materials passing the No. 50 sieve are removed before moving onto the next media installation step or to the disinfection step.

3. After the media has been placed and all layers have been skimmed, the media conditioner shall be applied as directed by the media supplier. After the conditioner has been allowed to sit in each filter cell for a minimum of 24 hours, the Contractor shall backwash each cell until no residual potassium permanganate is detectable in the spent backwash water. The backwash water shall be disposed of into the seepage basin.

F. Compliance Testing

1. All filter media shall be tested for conformance with these Specifications prior to delivery to the plant site. All tests shall be certified by an independent laboratory and approved by the Engineer prior to shipment.


2. Do not ship materials until approval of the shop drawing submittals have been received from the Engineer.

3. Upon delivery and final placement of the filter media, the Contractor shall have an independent testing laboratory test media from each cell to verify compliance with these Specifications. The samples shall be taken after the filter media has been backwashed and scraped.

4. The cost of all tests shall be paid by the Contractor. 3.08 FIELD QUALITY CONTROL

A. Manufacturer’s Field Services: 1. Inspect and approve the completed installation, make all necessary adjustments, corrections, or

modifications prior to start-up. 2. After start-up is authorized by Engineer, furnish a qualified representative to inspect the

completed installation, to supervise the system’s initial start-up, and to train the operating personnel in operation and equipment maintenance.

3. At least 1 day shall be reserved for start-up and adjustment. See Section 01 75 00. 4. After equipment has been placed into operation, make all final adjustments for the proper

operation of the equipment. 3.09 OPERATOR TRAINING

A. Provide a minimum of 8 hours of operator training at Owner’s convenience after equipment is operational.

B. Ensure plant personnel are sufficiently trained and thoroughly acquainted with operations and

maintenance materials to operate all components of the system.

END OF SECTION


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SECTION 44 44 13

REVISED CHEMICAL FEED EQUIPMENT (06/01/15)

PART 1 GENERAL

1.01 SUMMARY

A. Section Includes: 1. Providing and installing equipment to allow feeding of chlorine, sodium permanganate and liquid

ammonia into the water system. 2. Equipment and installations provided shall be complete with all accessories required for the

intended use. Liquid Measurement Instruments (LMI) chemical feed equipment or approved equal.

1.02 SYSTEM DESCRIPTION

A. Feed System: Provide feed systems capable of feeding allow feeding of chlorine, sodium permanganate and liquid ammonia into the water system.

B. Feed Rates:

1. Chlorine: 13-16 PPD (pounds per day) 2. Sodium Permanganate: 0.10 – 0.60 gph (gallons per hour 3. Liquid Amonia: .05 – 0.30 gph (gallons per hour)

C. The feeders will be controlled with pump start/stop signal to electrical outlet and flow paced by the new

plant flow meter 1.03 WARRANTY

A. The feed systems and all component equipment and parts shall be guaranteed free from defects by Contractor for a period of 1 year from the date of the final contract payment. System failures within the warranty period due to defective equipment, parts or installation shall be corrected by Contractor at no cost to Owner.

1.04 QUALITY ASSURANCE

A. Single Source Responsibility: All components to be provided by 1 supplier.

B. Qualifications: 1. Manufacturer/supplier shall have minimum 5 years documented experience in the manufacture

and installation of gas chlorination systems. 2. Manufacturer/supplier shall maintain full-time service staff.

C. Regulatory Requirements: Materials and equipment provided in this Section shall comply with the

recommended practices and standards for the Chlorine Institute, Inc. PART 2 PRODUCTS

2.01 CHLORINE FEED EQUIPMENT

A. Design Requirements: 1. Provide for the conveyance of chlorine gas under vacuum from the vacuum regulators to the

ejector-check valve assemblies via automatic flow proportioned control. 2. Entire system can be vacuum checked in the field. 3. Equipped as follows:

Revised Chemical Feed Equipment (06/01/15) PELIC 131212 44 44 13 - 1

a. Two (2) Cylinder-mounted regulators. b. Automatic switchover module. c. One (1) Remote gas feeder meter panel d. One (1) Ejector assembly. e. Chlorine gas detector. f. Cylinder scale. g. One Ejector pipeline diffuser assembly h. Lot of feed tubing. i. Insect screen. j. Signage. k. Outdoor steel cylinder storage cabinet

B. Acceptable Manufacturers:

1. Chlorine feed system: a. Hydro Instruments, Perkasie, PA, USA or approved equal b. Manufacturer of comparable products submitted in compliance with Section 01 25 13.

2. Chlorine cylinder storage Cabinet: a. Hawkins water treatment group b. Manufacturer of comparable products submitted in compliance with Section 01 25 13.

C. Component Fabrication

1. Vacuum Regulators: a. Number required: 1 b. Mount directly on gas valve via positive yoke type gasket connection. c. Provide vacuum control by spring opposed diaphragm regulator that closes tight upon loss of

vacuum. d. Equip as follows:

1) Gravity actuated, loss of gas indicator. 2) 100 pounds/day gas flow meter. 3) Gas direction indicator.

e. Pressure relief: 1) Pressure relief valve, spring-loaded, diaphragm actuated. 2) Vent gas at regulator.

D. Automatic Switchover Module:

1. Provide 1 automatic switchover modules, wall-mount. 2. Capacity: 100 pounds/day. 3. Vacuum operated switching from empty to full source. 4. No manual reset required. 5. Operated by spring-loaded toggle. 6. Preset at factory.

E. Ejector/Check Assembly:

1. Discharge gas/ejector water solution to point of application. 2. Equip with check valve to prevent backup into regulators. 3. Automatic gas flow shut-off upon loss of water. 4. Maximum feed rate: 100 pounds/day. 5. No diaphragm.

F. Automatic Gas Feeder:

1. Provide 1 wall-mounted automatic gas feeder systems with electronic micro-processor-based controller.

2. Operation: Vacuum operated and shall convey gas under vacuum from vacuum regulator to ejector check valve assembly to maintain complete system safety. a. Flow proportional chlorinators shall be designed for automatic proportional control from a 4-

20mA DC flow signal. Unit shall operate with an accuracy of plus or minus 5 percent over a 20 to 1 feed range.

b. 120 volts, single phase, and 60 Hz power supply.

Revised Chemical Feed Equipment (06/01/15) 44 44 13 - 2 PELIC 131212

3. Equip as follows: a. Vacuum gage in the vacuum system to indicate proper operation of the equipment. b. Vent to the atmosphere outside the chemical feed room. c. A check valve preventing the backflow of injector water into chlorine gas lines. d. Manual dosage and adjustment on the face of the chlorinator.

4. All components of the chlorinator, including microprocessor controller, shall be panel-mounted, maximum panel width 24 inches.

5. The chlorinators shall be Hydro WPOV-100.

G. Ball Valve Main Connection: Provide one 3/4-inch NPT PVC ball valve main and connection with diffuser.

H. Scale:

1. Quantity: 1 2. Electronic type 3. Platform: Non-corrosive PVC. 4. Provide for two 150-pound cylinders. 5. Load cell:

a. Temperature stable, rolling diaphragm type. b. Connect load cell to wall-mounted indicator dial with flexible PVC coated copper tubing.

6. Cylinder chaining bracket: a. Provide for each cylinder. b. Include integral tool rack.

7. Warranty: 5 years on all parts. 8. Force Flow GR150-2 or equal. 9. Coordinate power supply with electrical 10. Mount scale display inside of the water treatment plant building

I. Chlorine Gas Detector:

1. Multi point detector with sensor operated from 120 VAC source. 2. Sensor:

a. Type: electrochemical, micro-redox. b. Maximum stabilization time: 1 hour. c. Response and recovery time for 10 ppm: 30 seconds. d. Measuring range: 0 to 10 ppm.

3. Gas level display: a. Colored bar graph. b. Flashing LED alarm set point. c. Locate on front panel set.

4. Output relays: a. Alarm and malfunction. b. DPDT latch/unlatch. c. 5A at 240 VAC/28 DC.

5. Hydro Model GA-170, or equal. 6. Underwriter’s Laboratory (UL) approved.

J. Chlorine Cylinder Storage Cabinet:

1. Material: 16 gauge aluminum 2. Dimensions

a. 48-inches wide b. 72-inches tall c. 23 inches deep

3. Dual Doors: 24” Wide each 4. Furnish & properly secure 1.5” thick FRP faced polystyrene insulation to all interior faces of

storage cabinet. Including walls, ceiling and door. 5. Furnish metal floor 6. Mount entire assembly on new concrete pad.

a. Locate on right half of new pad, left half shall be reserved for cylinder storage, furnish wall attached safety chains


7. Install unit heater and outlet as called for in addendum No.1. 2.02 SODIUM PERMANGANATE FEED EQUIPMENT

A. Storage Tanks 1. Provide (1) polyethylene tank. 2. Linear length HDPE construction. 3. Capacity: 200 gallons 4. Calibrated with calibration tape in 25-gallon increments. 5. The tank shall be provided with the following connections;

a. 1-1/4 inch PVC dip leg with suction tubing and foot valve strainer inside the tank. b. 1-1/2 inch Bulkhead with threaded plug to serve as fill. c. Port for level transducer.

6. JACO male connector for the pump return/pressure relief

B. Containment Tank 1. Description:

a. Number: 1. b. Size: 225 gallons c. Material: Polyethylene, Polypropylene

C. Chemical Feed Pump

1. Type: Electronic diaphragm variety, utilizing a stroke length and separate speed adjustment system to adjust feed rate. a. Product: LMI Series B. b. Number: 1 c. Capacity: Each pump shall have a capacity range to pump 1.0 gph at 110 psi. d. UL listed. e. LMI Model AA951 f. Equip with:

1) Provide (1) LMI 26221 Flush Kit with the pump 2) Spare parts kit including the entire head assembly and liquid end assembly. 3) Thermal protection with auto reset, include indicator lights, bleed valve assembly,

panel-mounted circuit breaker, stroke lock. 4) 100:1 turndown. 5) 3-function valve per pump. 6) Machined Head 91S

g. Metering pump shall be capable of dividing or multiplying pulse inputs from 1 to 999 or responding directly or inversely to a 4-20 mAdc input signal.

h. Output volume shall be adjustable while pumps are in operation from zero to maximum capacity.

i. Adjustment shall be by readily accessible dial knob for changing stroke length. j. The pump drive shall be totally enclosed with no exposed moving parts. k. Solid-state electronic pulser shall be fully encapsulated with no exposed printed circuit etch

and shall be supplied with quick connect terminals of at least 3/16 inch wide. l. Electronics shall be housed in a chemical resistant enclosure at the rear of the pump for

maximum protection against chemical spillage. m. A foot valve with integral one-piece strainer shall be provided for suction line, and an

injection/back pressure check valve with 1/2-inch NPT male connection for the injection point. The injection check valve shall incorporate a dilating orifice, which inhibits accumulation of crystalline deposits.

2.03 LIQUID AMMONIA FEED EQUIPMENT

A. Storage Tanks 1. Provide (1) polyethylene tank. 2. Linear length HDPE construction. 3. Capacity: 150 gallons 4. Calibrated with calibration tape in 25-gallon increments.


5. The tank shall be provided with the following connections; a. Hinged mixer mount type cover. b. 1-1/4 inch PVC dip leg with suction tubing and foot valve strainer inside the tank. c. 1-1/2 inch Bulkhead with threaded plug to serve as fill. d. Port for level transducer.

6. JACO male connector for the pump return/pressure relief

B. Containment Tank 1. Description:

a. Number: 1. b. Size: 175 gallons c. Material: Polyethylene, Polypropylene

C. Chemical Feed Pump

1. Type: Electronic diaphragm variety, utilizing a stroke length and separate speed adjustment system to adjust feed rate. a. Product: LMI Series B. b. Number: 1 c. Capacity: Each pump shall have a capacity range to pump 1.0 gph at 110 psi. d. UL listed. e. LMI Model AA951 f. Equip with:

1) Provide (1) LMI 26221 Flush Kit with the pump 2) Spare parts kit including the entire head assembly and liquid end assembly. 3) Thermal protection with auto reset, include indicator lights, bleed valve assembly,

panel-mounted circuit breaker, stroke lock. 4) 100:1 turndown. 5) 3-function valve per pump. 6) Machined Head 91S

g. Metering pump shall be capable of dividing or multiplying pulse inputs from 1 to 999 or responding directly or inversely to a 4-20 mAdc input signal.

h. Output volume shall be adjustable while pumps are in operation from zero to maximum capacity.

i. Adjustment shall be by readily accessible dial knob for changing stroke length. j. The pump drive shall be totally enclosed with no exposed moving parts. k. Solid-state electronic pulser shall be fully encapsulated with no exposed printed circuit etch

and shall be supplied with quick connect terminals of at least 3/16 inch wide. l. Electronics shall be housed in a chemical resistant enclosure at the rear of the pump for

maximum protection against chemical spillage. m. A foot valve with integral one-piece strainer shall be provided for suction line, and an

injection/back pressure check valve with 1/2-inch NPT male connection for the injection point. The injection check valve shall incorporate a dilating orifice, which inhibits accumulation of crystalline deposits.

2.04 ACCESSORIES

A. Tubing and Fittings: Provide all required tubing and fittings for a complete installation, including injection fittings and main connections.

B. Safety Equipment: Provide 1 set of chemical handling equipment including goggles, apron, and rubber

gloves.

C. Ball Valve Main Connection: Provide appropriate number of 3/4-inch PVC NPT ball valve main connection complete with diffuser.


PART 3 EXECUTION

3.01 INSTALLATION

A. Comply with manufacturer’s Product Data, including installation instructions and details.

B. Provide oil seals at all shafts.

C. Housings shall be dust and moisture-tight and have an easy means of filling, draining and checking oil level.

D. Separate drive motors from gear reducer.

E. Connections to existing facility piping and modifications to or relocation of existing piping required for

proper installation of new equipment, shall be pursued on a continuous basis and coordinated with Engineer so as to cause minimum shut-down time in existing facility.

F. Anchor bolts: Set by template and protect from misalignment.

G. Provide at least 1 day of installation supervision by the manufacturer’s representative.

3.02 FIELD QUALITY CONTROL

A. Manufacturer’s Field Services: 1. Inspect and approve the completed installation, make all necessary adjustments, corrections, or

modifications prior to start-up. 2. Ensure seamless transition from existing chemical feed system to new installation of chemical

feed equipment. 3. Coordinate all installations with City and Engineer. 4. After start-up is authorized by Engineer, furnish a qualified representative to inspect the

completed installation, to supervise the system’s initial start-up, and to train the operating personnel in operation and equipment maintenance.

5. At least 1 day shall be reserved for start-up and adjustment. See Section 01 75 00. 6. After equipment has been placed into operation, make all final adjustments for the proper

operation of the equipment. 3.03 OPERATOR TRAINING

A. Provide a minimum of 4 hours of operator training at Owner’s convenience after equipment is operational.

B. Ensure plant personnel are sufficiently trained and thoroughly acquainted with operations and

maintenance materials to operate all components of the system.

END OF SECTION


Documents

DOCUMENT 00 00 11 ADDENDUM NO. 1 June 1, 2015 2015 …2.fmbx.org/files/060415-2015-water-treatment-plant-renovations... · 2015 Water Treatment Plant Renovations Pelican Rapids,