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PSD/NNSR Applicability Examples

Matt Earnest, Ph.D.

Air Permits Division

Texas Commission on Environmental Quality

Advanced Air Permitting Seminar 2014

Applicability Flow Chart

Go though flowchart, pollutant by pollutant.1-is source in nonattainment area for the pollutants?2-is the source an existing major source? (major for one, major for all)3-increases only, no decreases at this step. Ensure the change is a modification.4- a major mod occurs when increases > significant emission rates5- are the project increases > than major source thresholds?6- include all increases and creditable decreases in contemporaneous window.

Does PSD/NNSR Apply?

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Major Source Thresholds

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PSD CriteriaNamed 100 tpyUn-named 250 tpy

Ozone NNSRMarginal 100 tpy Moderate 100 tpy Wise Co.Serious 50 tpy DFWSevere 25 tpy HGBExtreme 10 tpy

PM10 NNSRMarginal 100 tpyModerate 100 tpyEl Paso Co.Serious 70 tpy

≥

Example: New Major Source(Type 1)

Will the following “unnamed” source, proposed to be built in a severe ozone nonattainment area (HGB), be major for NNSR and/or PSD? If so, for which pollutants?

Pollutant NOX CO PM10

Source PTE (tpy) 91 315 52

NNSR: Yes, major source because NOX≥25 tpy

PSD: Yes, major source for all pollutants because CO≥250 tpy

Project Increase at Major Source (Type 2)

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Is Project Increase ≥ PSD Significant Emission Rate?

Project Increase = Planned Emissions - Baseline Actual

Example: Base Line (Type 2)

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Year EPN A EPN B EPN C EPN D(tpy) (tpy) (tpy) (tpy)

2004 50 20 19 02005 52 20 23 02006 60 21 22 02007 61 22 23 02008 61 21 23 02009 61 21 20 02010 59 19 22 02011 60 18 22 02012 60 16 23 02013 60 17 20 0

BAE 61 21.5 23 50

A site is considering a throughput increase in 2014. What is the baseline actual emission rate, given EPN D was built in 2013 with an allowable of 50 tpy?

• Right example-correct way to calculate BAE by using emissions from all EPNs from years 2007 and 2008

• Must be same time period for all facilities for common pollutant.

• Adjust baseline if:• < 24-month operation• Compliance issues

Planned Emissions

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EPN A is operating far below it’s PTE. What are the project increases given the following?

EPN A Baseline Actual Emissions (BAE) = 61 tpyEPN A Potential to Emit (PTE) = 201 tpyEPN A Projected Actual after project (PAE) = 72 tpy

Project increase:Based on Projected Actual: PAE – BAE = 72 – 61 = 11 tpy Based on Potential to Emit: PTE – BAE = 201 – 61 = 140 tpy

Use of Projected Actuals may require additional record keeping.

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Table 2FPollutant: NOx Permit: 000000

Baseline Period: 2007 to 2008

A B

Affected or Modified Facilities

FIN EPN Permit No. Actual Emissions Baseline

Emissions Proposed Emissions

Projected Actual

Emissions

Difference (B-A)

Correction Project Increase

1. Unit A A 000001 61 61 201 72 11 11

2. Unit B B 000000 21.5 21.5 35.5 14 14

3. Unit C C 000000 23 23 29 6 6

4 Unit D D 000000 0 50 61 11 11

5.

6.

7.

8.

9.

Page Subtotal 42

Contemporaneous Window

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Example: Netting (Type 3)

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A company is considering a major project at EPN B that requires netting. The source has been affected by the following unrelated projects within the last five years. What is the contemporaneous change?

PA

ST

2010: PTE = 15 tpy Proposed PTE = 25 tpy Baseline Actuals = 15 tpy Project Change: 25 - 15 = 10 tpy

2011: PTE = 25 tpy Proposed PTE = 25 tpy Baseline Actuals = 15 tpy Project Change: 25 - 15 = 10 tpy

2011: PTE = 25 tpy Proposed PTE = 25 tpy Baseline Actuals = 15 tpy Project Change: 25 - 15 = 10 tpy

CU

RR

EN

T 2014: PTE = 20 tpy Proposed PTE = 30 tpy Baseline Actuals = 15 tpy Project Change: 30 - 15 = 15 tpy

Net: 15 + 10 + 10 + 10 = 45 tpy

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3F: Contemporaneous ChangeCompany: Sample

Permit Application Number: 000000 Criteria Pollutant: NOx

A B

Project Date Facility at Which Emission Change

Occurred FIN EPN

Permit No. Project Name or Activity

Baseline Period (years)

Proposed Emissions (tons/year)

Baseline Emissions (tons/year)

Difference (A-B)

Creditable Decrease or

Increase

1. 2010 Unit B Unit B 000000 (Proj # xyz123) 2006-2007 25 15 10 10

2. 2011 Unit B Unit B 000000 (Proj # 123xyz) 2006-2007 25 15 10 10

3. 2011 Unit B Unit B 000000 (Proj # 1x2y3z) 2006-2007 25 15 10 10

4. 2014 Unit B Unit B 000000 (Proj # 321zyx) 2006-2007 30 15 15 15

5.

6.

7.

8.

9.

10.

Page Subtotal 45 45

Summary of Contemporaneous Changes Total 45 45

Contemporaneous Window

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Example: End Points (Type 3)

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A company is considering a major project at EPN B that requires netting. The source has been affected by the following unrelated projects within the last five years. What is the contemporaneous change?

2010: PTE = 15 tpy Proposed PTE = 25 tpy Baseline Actuals = 15 tpy Project Change: 25 - 15 = 10 tpy

2011: PTE = 25 tpy Proposed PTE = 25 tpy Baseline Actuals = 15 tpyProject Change: 25 - 15 = 10 tpy

2011: PTE = 25 tpy Proposed PTE = 25 tpy Baseline Actuals = 15 tpyProject Change: 25 - 15 = 10 tpy

2014: PTE = 20 tpy Proposed PTE = 30 tpy Baseline Actuals = 15 tpy Project Change: 30 - 15 = 15 tpy

Net: 15 + 10 + 10 + 10 = 45 tpy No...Year

2011 is not considered in the calculation to determine the contemporaneous change; 45 tons/year is not the correct answer

2010: Baseline Actuals = 15 tpy, 2011, 2011, 2014: Proposed PTE = 30 tpy, Net: 30 – 15

= 15 tpy

Baseline Actuals = 15 tpy

2011:

2011:

2014:

Proposed PTE = 30 tpy

Net: 30 - 15 = 15 tpy

3F: Contemporaneous Change

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Company: Sample

Permit Application Number: 000000 Criteria Pollutant: NOx

A B

Project Date Facility at Which Emission Change

Occurred FIN EPN

Permit No. Project Name or Activity

Baseline Period (years)

Proposed Emissions (tons/year)

Baseline Emissions (tons/year)

Difference (A-B)

Creditable Decrease or

Increase

1. 2010 Unit B Unit B* 000000 (Proj # xyz123) 2006-2007 25 15 10 10

2. 2011 Unit B Unit B* 000000 (Proj # 123xyz) 2006-2007 25 25 0 0

3. 2011 Unit B Unit B* 000000 (Proj # 1x2y3z) 2006-2007 25 25 0 0

4. 2014 Unit B Unit B* 000000 (Proj # 321zyx) 2006-2007 30 25 5 5

5.

6.

7.

8.

9.

10.

Page Subtotal 15 15

Summary of Contemporaneous Changes Total 15 15

* Endpoints netting has been applied

Items to Double Check

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• Project aggregation • Site definition • Inclusion of fugitives• Differences with power generation• Demand growth exclusion• Retrospective reviews

Thank you

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For more information:

See Guidance:APDG 5881, Major New Source Review - Applicability Determination

(March 2013)

APDG 6241v1, Fact Sheet – PSD and Nonattainment (Revised 07/14)

Contacts

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Matt Earnest (512) 239-2618Johnny Vermillion (512) 239-1292

Air Permits Division (512) 239-1250

Air Permits Division

Matt Earnest

(512) 239-2618

Air Permits Division

Johnny Vermillion

(512) 239-1292

Main Line

(512) 239-1250

Air Permits Division