This spreadsheet is from the proposed rulemaking, with the transcription error corrected in column C

Actual CAMD data Installation years Avg of 01-08 34,152

final rule effective date of 1/1/2013 as reported in

proposed rule, with transcription error Step 1: with correction of transcription error Step 2: PLUS with

adjustment of final rule effective date to 12/31/13

Year **From proposal: 5-**

**yr BART as if LNB not yet installed**  **From Proposal 5 yr**

**BART actual LNB install**  **5 yr BART actual LNB install**  **5 yr BART actual**

**LNB install**

install years by 2018 by 2018 by 2018 by 2018 2001 34,019 34,019 34,019 34,019 2002 35,569 35,569 35,569 35,569 2003 31,620 31,620 31,620 31,620 2004 33,986 33,986 33,986 33,986 2005 33,221 33,221 33,221 33,221 2006 34,744 34,744 34,744 34,744 2007 35,253 35,253 35,253 35,253 2008 34,803 34,803 34,803 34,803 2009 34,152 30,500 30,500 30,500 2010 34,152 24,427 24,427 24,427 2011 34,152 19,837 19,837 19,837 2012 34,152 23,325 23,325 23,325 2013 34,152 23,325 23,325 23,325 2014 34,152 23,325 23,325 23,325 2015 34,152 23,325 23,325 23,325 2016 34,152 23,325 23,325 23,325 2017 34,152 23,325 23,325 23,325 2018 5,345 5,343 5,345 23,325 2019 5,345 5,343 5,345 5,345 2020 5,345 5,343 5,345 5,345 2021 5,345 5,343 5,345 5,345 2022 5,345 5,343 5,345 5,345 2023 5,345 5,343 5,345 5,345 2024 5,345 5,343 5,345 5,345 2025 5,345 5,343 5,345 5,345 2026 5,345 5,343 5,345 5,345 2027 5,345 5,343 5,345 5,345 2028 5,345 5,343 5,345 5,345 2029 5,345 5,343 5,345 5,345 2030 5,345 5,343 5,345 5,345 2031 5,345 5,343 5,345 5,345 2032 5,345 5,343 5,345 5,3452033 5,345 5,343 5,345 5,345

2034 5,345 5,343 5,345 5,345 2035 5,345 5,343 5,345 5,345 2036 5,345 5,343 5,345 5,345 2037 5,345 5,343 5,345 5,345 2038 5,345 5,343 5,345 5,345 2039 5,345 5,343 5,345 5,345 2040 5,345 5,343 5,345 5,345 2041 5,345 5,343 5,345 5,345 2042 5,345 5,343 5,345 5,345 2043 5,345 5,343 5,345 5,345 2044 5,345 5,343 5,345 5,345

sum (09-44) **451,689** 358,974 359,028 377,008Step 3: PLUS with

LNB/SOFA credit

**5-yr BART as if LNB not yet**  **installed**

by 2018 34,019 35,569 31,620 33,986 33,221 34,744 35,253 34,803 34,152 34,152 34,152 34,152 34,152 34,152 34,152 34,152 34,152 34,152 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,3455,345

5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345 5,345

480,489Year Total NOx (tons) Heat Input (MMBtu) Emission Rate

2001 34,019 191,638,695 0.355 2002 35,569 199,398,687 0.357 2003 31,620 183,478,417 0.345 2004 33,986 197,247,286 0.345 2005 33,221 191,786,039 0.346 2006 34,744 195,629,519 0.355 2007 35,253 196,676,299 0.358 2008 34,803 199,136,340 0.3495 2009 30,501 184,315,616 0.331 2010 24,427 173,473,615 0.282 2011 19,837 180,463,627 0.220 2012 16,468 164,966,570 0.200 2013 17,456 173,672,459 0.201

AVG (01-08) 34,152 194,373,910 0.351 AVG (01-03) 191,505,266 AVG (09-12) 175,804,857 AVG (09-13) 175,378,377 AVG (01-08) 0.351 AVG (01-12) 188,184,226 AVG (01-13) 187,067,936

0.108311715 18,995,533 0 50,000,000 100,000,000 150,000,000 200,000,000 250,000,000

20012001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013



# Heat Input (MMBtu)**TWG used a different, but equivalent, method for applying the LNB/SOFA early installation credit compared to the method EPA used in the February 5, 2013 proposal**

Example from Calculation in 2/5/13 Proposal, except that it does not propagate a transcription error in the original spreadsheet from 2/5/13 Proposal ** Original spreadsheet inadvertantly, resulting from transcription error, used "5,343" instead of "5,345" in many cells

Avg of 01-08 34,152

Year **5-yr BART**

**as if LNB not yet**  **installed 5 yr BART** 

**actual LNB**  **install** Alt 1

install years by 2018 by 2018 21/22/23 2001 34,019 34,019 34,019 2002 35,569 35,569 35,569 2003 31,620 31,620 31,620 2004 33,986 33,986 33,986 2005 33,221 33,221 33,221 2006 34,744 34,744 34,744 2007 35,253 35,253 35,253 2008 34,803 34,803 34,803 2009 34,152 30,500 30,501 2010 34,152 24,427 24,427 2011 34,152 19,837 19,837 2012 34,152 23,325 23,325 2013 34,152 23,325 23,325 2014 34,152 23,325 23,325 2015 34,152 23,325 23,325 2016 34,152 23,325 23,325 2017 34,152 23,325 23,325 2018 34,152 23,325 23,325 2019 5,345 5,345 23,325 2020 5,345 5,345 23,325 2021 5,345 5,345 17,332 2022 5,345 5,345 11,338 2023 5,345 5,345 5,345 2024 5,345 5,345 5,345 2025 5,345 5,345 5,345 2026 5,345 5,345 5,345 2027 5,345 5,345 5,345 2028 5,345 5,345 5,345 2029 5,345 5,345 5,345 2030 5,345 5,345 5,345 2031 5,345 5,345 5,345 2032 5,345 5,345 5,345 2033 5,345 5,345 5,345 2034 5,345 5,345 5,345 2035 5,345 5,345 5,3452036 5,345 5,345 5,345

2037 5,345 5,345 5,345 2038 5,345 5,345 5,345 2039 5,345 5,345 5,345 2040 5,345 5,345 5,345 2041 5,345 5,345 5,345 2042 5,345 5,345 5,345 2043 5,345 5,345 5,345 2044 5,345 5,345 5,345

sum (09-44) **480,489** 377,008 430,948

**LNB credit 103,481**  **Adjusted Emissions with LNB Credit** 327,467

**EPA Method for Comparing Alternative to BART applied the LNB/SOFA Credit to the Alternative (via subtraction), such that** Total 2009-2044 BART Emissions = 377,008 Adjsuted 2009-2044 Emissions from Alternative = 327,467 Emissions from Alternative are less than BART by: 49,541

**TWG Method for Comparing Alternative to BART applied the LNB/SOFA Credit to the BART Threshold (cap) (via addition)* instead of the Alternative, such that** ***(In other words, the BART Cap is calculated "as if" LNB/SOFA were not installed early at NGS and are installed concurrently with new controls by BART compliance date)** Total 2009-2044 BART Emissions = 480,489 Adjsuted 2009-2044 Emissions from Alternative = 430,948 Emissions from Alternative are less than BART by: 49,541

**The resulting difference between BART and the Alternative to BART are equivalent using both methods. Therefore, EPA's analysis of the TWG Alternatives in the following spreadsheets use the TWG Method and apply the LNB/SOFA credit to the BART Cap/Threshold** **TWG used a different, but equivalent, method for applying the LNB/SOFA early installation credit compared to the method EPA used in the February 5, 2013 proposal**

Example from Calculation in 2/5/13 Proposal, except that it does not propagate a transcription error in the original spreadsheet from 2/5/13 Proposal ** Original spreadsheet inadvertantly, resulting from transcription error, used "5,343" instead of "5,345" in many cells**EPA Method for Comparing Alternative to BART applied the LNB/SOFA Credit to the Alternative (via subtraction), such that**

**TWG Method for Comparing Alternative to BART applied the LNB/SOFA Credit to the BART Threshold (cap) (via addition)* instead of the Alternative, such that** ***(In other words, the BART Cap is calculated "as if" LNB/SOFA were not installed early at NGS and are installed concurrently with new controls by BART compliance date)**

**Therefore, EPA's analysis of the TWG Alternatives in the following spreadsheets use the TWG Method and apply the LNB/SOFA credit to the BART Cap/Threshold**Actual CAMD data Avg NOx 01-08

Installation years Avg Heat Input 01-12 Avg Heat Input 01-08 Avg Heat Input 01-13 Avg Heat Input 09-13

Year Actual NOx

Emissions (from AMPD) Actual Heat

Input (from AMPD) **5-yr BART as if**

**LNB not yet installed**  **5-yr BART as if LNB not**

**yet installed**

**NOx Cap calculated from**  **Supplemental proposal**  **NOx Cap using avg heat**

**rate (01-13)**

install years by 7/1/19 2001 34,019 191,638,695 34,019 34,019 2002 35,569 199,398,687 35,569 35,569 2003 31,620 183,478,417 31,620 31,620 2004 33,986 197,247,286 33,986 33,986 2005 33,221 191,786,039 33,221 33,221 2006 34,744 195,629,519 34,744 34,744 2007 35,253 196,676,299 35,253 35,253 2008 34,803 199,136,340 34,803 34,803 2009 30,501 184,315,616 34,152 32,862 2010 24,427 173,473,615 34,152 32,862 2011 19,837 180,463,627 34,152 32,862 2012 16,468 164,966,570 34,152 32,862 2013 17,456 173,672,459 34,152 32,862 2014 34,152 32,862 2015 34,152 32,862 2016 34,152 32,862 2017 34,152 32,862 2018 34,152 32,862 2019 19,749 19,003 2020 5,345 5,144 2021 5,345 5,144 2022 5,345 5,144 2023 5,345 5,144 2024 5,345 5,144 2025 5,345 5,144 2026 5,345 5,144 2027 5,345 5,144 2028 5,345 5,144 2029 5,345 5,144 2030 5,345 5,144 2031 5,345 5,144 2032 5,345 5,1442033 5,345 5,144

2034 5,345 5,144 2035 5,345 5,144 2036 5,345 5,144 2037 5,345 5,144 2038 5,345 5,144 2039 5,345 5,144 2040 5,345 5,144 2041 5,345 5,144 2042 5,345 5,144 2043 5,345 5,144 2044 5,345 5,144

sum (09-44) **494,899 476,237** 

Difference 18,662 4%34,152 NOx limit 0.24 188,184,226 Avg NOx rate 11-12 0.21 194,373,910 Avg NOx rate (01-08) 0.351 187,067,936 175,378,377

**5-yr BART as if LNB not yet installed**  **5-yr BART as if LNB not yet installed** 

**NOx Cap using Actual Past Annual Heat Input**  **and for future use max heat input (01-13)**  **NOx Cap using BART limit of 0.048 (as suggested by**  **Miller Sahu) and Max heat**

**input**

34,019 34,019 35,569 35,569 31,620 31,620 33,986 33,986 33,221 33,221 34,744 34,744 35,253 35,253 34,803 34,803 32,379 35,029 30,474 35,029 31,702 35,029 28,980 35,029 30,509 35,029 35,029 35,029 35,029 35,029 34,983 35,029 34,983 35,029 34,983 35,029 20,233 19,907 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,7865,483 4,786

5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786 5,483 4,786

**486,369 489,832** 

8,531 5,067 2% 1%Actual CAMD data Avg NOx 01-08 34,152 NOx limit

Closure or Installation years Avg Heat Input 01-12 188,184,226 Avg NOx rate 11-12 Avg Heat Input 01-08 194,373,910

**TWG A1 = close one unit by 2020, install SCR on remaining two units by 2031**

Year Actual

Emissions **5-yr BART as**

**if LNB not yet installed**  **BART Glide Path to**  **Cap EST. TWG A1**  **EST. TWG A1**

install years by 7/1/19 cumulative cumulative cumulative 2001 34,019 34,019 34,019 2002 35,569 35,569 35,569 2003 31,620 31,620 31,620 2004 33,986 33,986 33,986 2005 33,221 33,221 33,221 2006 34,744 34,744 34,744 2007 35,253 35,253 35,253 2008 34,803 34,803 34,803 2009 30,501 34,152 34,152 34,152 30,501 30,501 2010 24,427 34,152 68,304 47,316 24,427 54,928 2011 19,837 34,152 102,456 60,480 19,837 74,765 2012 16,468 34,152 136,608 73,645 16,468 91,233 2013 17,456 34,152 170,759 86,809 17,456 108,689 2014 34,152 204,911 99,973 19,752 128,441 2015 34,152 239,063 113,137 19,752 148,193 2016 34,152 273,215 126,301 19,752 167,945 2017 34,152 307,367 139,466 19,752 187,697 2018 34,152 341,519 152,630 19,752 207,449 2019 19,749 361,267 165,794 19,752 227,201 2020 5,345 366,613 178,958 13,168 240,369 2021 5,345 371,958 192,122 13,168 253,537 2022 5,345 377,303 205,287 13,168 266,705 2023 5,345 382,648 218,451 13,168 279,873 2024 5,345 387,994 231,615 13,168 293,041 2025 5,345 393,339 244,779 13,168 306,209 2026 5,345 398,684 257,944 13,168 319,378 2027 5,345 404,030 271,108 13,168 332,546 2028 5,345 409,375 284,272 13,168 345,714 2029 5,345 414,720 297,436 13,168 358,882 2030 5,345 420,065 310,600 13,168 372,050 2031 5,345 425,411 323,765 4,391 376,441 2032 5,345 430,756 336,929 4,391 380,832 2033 5,345 436,101 350,093 4,391 385,223 2034 5,345 441,447 363,257 4,391 389,613 2035 5,345 446,792 376,421 4,391 394,004 2036 5,345 452,137 389,586 4,391 398,3952037 5,345 457,482 402,750 4,391 402,786

2038 5,345 462,828 415,914 4,391 407,177 2039 5,345 468,173 429,078 4,391 411,568 2040 5,345 473,518 442,243 4,391 415,959 2041 5,345 478,864 455,407 4,391 420,350 2042 5,345 484,209 468,571 4,391 424,741 2043 5,345 489,554 481,735 4,391 429,132 2044 5,345 494,899 494,899 4,391 433,523

sum (09-44) **494,899 433,523**  AVG slope 13,164

**** TWG A2 and A3 result in equivalent MW reductions i.e., assuming Navajo Nation elects to purchase 170 MW, and capacity icnrease also include 19 MW to make up for LADWP and NV Energy shortfall from 1 750 MW unit**  **Under A2, close one unit, increase capacity by 170 + 19 MW = capacity reduction of 750 - 170 MW - 19 MW = 561 MW Under A3, curtail one unit by LADWP + NVEnergy - Navajo Nation share = 477 + 254 - 170 = 561 MW** 0.24

0.21

33,736

87%**i.e., assuming Navajo Nation elects to purchase 170 MW, and capacity icnrease also include 19 MW to make up for LADWP and NV Energy shortfall from 1 750 MW unit Under A2, close one unit, increase capacity by 170 + 19 MW = capacity reduction of 750 - 170 MW - 19 MW = 561 MW** 0

100,000 200,000 300,000 400,000 500,000 600,000200920102011201220132014201520162017201820192020202120222023202420252026202720282029203020312032203320342035203620372038203920402041204220432044**C u** **m u** **l a** **t i** **v e** **N O** **x E** **m i** **s s** **i o** **n s** 

**Year** 

# Comparison of NOx Cap with TWG Alternative A1 (1 unit closes in 2020, **no capacity incr ease,**  **2 units meet 0.07 lb/MMBtu in 2031)**

Glide Path to Cap

BART

TWG A1 NOx Cap over 2009

- 2044Actual CAMD data Avg NOx 01-08 34,152 NOx limit

Closure or Installation years Avg Heat Input 01-12 188,184,226 Avg NOx rate 11-12 Avg Heat Input 01-08 194,373,910

**TWG A2 = close one unit with capacity increase up to 189 MW (19 MW + max 170 MW - depends on how much of NGS Navajo Nation buys)**

Year Actual

Emissions **5-yr BART as**

**if LNB not yet installed**  **BART Glide Path to**  **Cap EST. TWG A2**  **EST. TWG A2**

install years by 7/1/19 cumulative cumulative cumulative 2001 34,019 34,019 34,019 2002 35,569 35,569 35,569 2003 31,620 31,620 31,620 2004 33,986 33,986 33,986 2005 33,221 33,221 33,221 2006 34,744 34,744 34,744 2007 35,253 35,253 35,253 2008 34,803 34,803 34,803 2009 30,501 34,152 34,152 34,152 30,501 30,501 2010 24,427 34,152 68,304 47,316 24,427 54,928 2011 19,837 34,152 102,456 60,480 19,837 74,765 2012 16,468 34,152 136,608 73,645 16,468 91,233 2013 17,456 34,152 170,759 86,809 17,456 108,689 2014 34,152 204,911 99,973 19,752 128,441 2015 34,152 239,063 113,137 19,752 148,193 2016 34,152 273,215 126,301 19,752 167,945 2017 34,152 307,367 139,466 19,752 187,697 2018 34,152 341,519 152,630 19,752 207,449 2019 19,749 361,267 165,794 19,752 227,201 2020 5,345 366,613 178,958 14,827 242,029 2021 5,345 371,958 192,122 14,827 256,856 2022 5,345 377,303 205,287 14,827 271,683 2023 5,345 382,648 218,451 14,827 286,510 2024 5,345 387,994 231,615 14,827 301,337 2025 5,345 393,339 244,779 14,827 316,165 2026 5,345 398,684 257,944 14,827 330,992 2027 5,345 404,030 271,108 14,827 345,819 2028 5,345 409,375 284,272 14,827 360,646 2029 5,345 414,720 297,436 14,827 375,473 2030 5,345 420,065 310,600 14,827 390,301 2031 5,345 425,411 323,765 4,944 395,245 2032 5,345 430,756 336,929 4,944 400,189 2033 5,345 436,101 350,093 4,944 405,133 2034 5,345 441,447 363,257 4,944 410,077 2035 5,345 446,792 376,421 4,944 415,022 2036 5,345 452,137 389,586 4,944 419,9662037 5,345 457,482 402,750 4,944 424,910

2038 5,345 462,828 415,914 4,944 429,854 2039 5,345 468,173 429,078 4,944 434,799 2040 5,345 473,518 442,243 4,944 439,743 2041 5,345 478,864 455,407 4,944 444,687 2042 5,345 484,209 468,571 4,944 449,631 2043 5,345 489,554 481,735 4,944 454,575 2044 5,345 494,899 494,899 4,944 459,520

sum (09-44) **494,899** 459,520 AVG slope 13,164

  TWG A2 and A3 result in equivalent MW reductions**  **i.e., assuming Navajo Nation elects to purchase 170 MW, and capacity icnrease also include 19 MW to make up for LADWP and NV Energy shortfall from 1 750 MW unit Under A2, close one unit, increase capacity by 170 + 19 MW = capacity reduction of 750 - 170 MW - 19 MW = 561 MW**  **Under A3, curtail one unit by LADWP + NVEnergy - Navajo Nation share = 477 + 254 - 170 = 561 MW**0.24

0.21

**TWG A2 = close one unit with capacity increase up to 189 MW (19 MW + max 170 MW - depends on how much of NGS Navajo Nation buys)**

33,736

85%**i.e., assuming Navajo Nation elects to purchase 170 MW, and capacity icnrease also include 19 MW to make up for LADWP and NV Energy shortfall from 1 750 MW unit Under A2, close one unit, increase capacity by 170 + 19 MW = capacity reduction of 750 - 170 MW - 19 MW = 561 MW** 0

100,000 200,000 300,000 400,000 500,000 600,000200920102011201220132014201520162017201820192020202120222023202420252026202720282029203020312032203320342035203620372038203920402041204220432044**C u** **m u** **l a** **t i** **v e** **N O** **x E** **m i** **s s** **i o** **n s** 

**Year**



# Comparison of NOx Cap with TWG Alternative A2 (1 unit closes plus **maximum capacity incr ease (189 MW) in 2020; and R**  **emaining 2 units** 

**meet 0.07 lb/MMBtu in 2031)**

Glide Path to Cap

BART

Est TWG A2 NOx Cap over 2009

- 2044Actual CAMD data Avg NOx 01-08 34,152 NOx limit

Closure or Installation years Avg Heat Input 01-12 188,184,226 Avg NOx rate 11-12 Avg Heat Input 01-08 194,373,910

**TWG A3a = curtail one unit by no less than 561 MW (Based on shares of (LADWP+NVE - Navajo Nation)=> 477 + 254 - (max of 170) MW = 561 MW; SCR installed on the 2 units that are not curtailed TWG A3b = curtail all 3 units equally by total of 561 MW, install SCR on Units 1 and 3**  **TWG A3c = curtail Units 1 and 3 by 561 MW total; install SCR on Units 1 and 3**

Year Actual

Emissions **5-yr BART as**

**if LNB not yet installed**  **BART Glide Path to**  **Cap EST. TWG** 

**A3a EST. TWG** 

**A3a** install years by 7/1/19 cumulative cumulative cumulative 2001 34,019 34,019 34,019 2002 35,569 35,569 35,569 2003 31,620 31,620 31,620 2004 33,986 33,986 33,986 2005 33,221 33,221 33,221 2006 34,744 34,744 34,744 2007 35,253 35,253 35,253 2008 34,803 34,803 34,803 2009 30,501 34,152 34,152 34,152 30,501 30,501 2010 24,427 34,152 68,304 47,316 24,427 54,928 2011 19,837 34,152 102,456 60,480 19,837 74,765 2012 16,468 34,152 136,608 73,645 16,468 91,233 2013 17,456 34,152 170,759 86,809 17,456 108,689 2014 34,152 204,911 99,973 19,752 128,441 2015 34,152 239,063 113,137 19,752 148,193 2016 34,152 273,215 126,301 19,752 167,945 2017 34,152 307,367 139,466 19,752 187,697 2018 34,152 341,519 152,630 19,752 207,449 2019 19,749 361,267 165,794 19,752 227,201 2020 5,345 366,613 178,958 14,827 242,029 2021 5,345 371,958 192,122 14,827 256,856 2022 5,345 377,303 205,287 14,827 271,683 2023 5,345 382,648 218,451 14,827 286,510 2024 5,345 387,994 231,615 14,827 301,337 2025 5,345 393,339 244,779 14,827 316,165 2026 5,345 398,684 257,944 14,827 330,992 2027 5,345 404,030 271,108 14,827 345,819 2028 5,345 409,375 284,272 14,827 360,646 2029 5,345 414,720 297,436 14,827 375,473 2030 5,345 420,065 310,600 14,827 390,301 2031 5,345 425,411 323,765 6,288 396,588 2032 5,345 430,756 336,929 6,288 402,876 2033 5,345 436,101 350,093 6,288 409,164 2034 5,345 441,447 363,257 6,288 415,4522035 5,345 446,792 376,421 6,288 421,740

2036 5,345 452,137 389,586 6,288 428,028 2037 5,345 457,482 402,750 6,288 434,316 2038 5,345 462,828 415,914 6,288 440,603 2039 5,345 468,173 429,078 6,288 446,891 2040 5,345 473,518 442,243 6,288 453,179 2041 5,345 478,864 455,407 6,288 459,467 2042 5,345 484,209 468,571 6,288 465,755 2043 5,345 489,554 481,735 6,288 472,043 2044 5,345 494,899 494,899 6,288 478,331

sum (09-44) **494,899** 478,331

slope 13,164

  TWG A2 and A3 result in equivalent MW reductions**  **i.e., assuming Navajo Nation elects to purchase 170 MW, and capacity icnrease also include 19 MW to make up for LADWP and NV Energy shortfall from 1 750 MW unit Under A2, close one unit, increase capacity by 170 + 19 MW = capacity reduction of 750 - 170 MW - 19 MW = 561 MW**  **Under A3, curtail one unit by LADWP + NVEnergy - Navajo Nation share = 477 + 254 - 170 = 561 MW**0.24

0.21

**TWG A3a = curtail one unit by no less than 561 MW (Based on shares of (LADWP+NVE - Navajo Nation)=> 477 + 254 - (max of 170) MW = 561 MW; SCR installed on the 2 units that are not curtailed**

**EST. TWG A3b**  **EST. TWG**

**A3b EST. TWG** 

**A3c EST. TWG** 

**A3c**

cumulative cumulative 34,019 34,019 33,736 35,569 35,569 31,620 31,620 33,986 33,986 33,221 33,221 34,744 34,744 35,253 35,253 34,803 34,803 30,501 30,501 30,501 30,501 24,427 54,928 24,427 54,928 19,837 74,765 19,837 74,765 16,468 91,233 16,468 91,233 17,456 108,689 17,456 108,689 19,752 128,441 19,752 128,441 19,752 148,193 19,752 148,193 19,752 167,945 19,752 167,945 19,752 187,697 19,752 187,697 19,752 207,449 19,752 207,449 19,752 227,201 19,752 227,201 14,827 242,029 14,827 242,029 14,827 256,856 14,827 256,856 14,827 271,683 14,827 271,683 14,827 286,510 14,827 286,510 14,827 301,337 14,827 301,337 14,827 316,165 14,827 316,165 14,827 330,992 14,827 330,992 14,827 345,819 14,827 345,819 14,827 360,646 14,827 360,646 14,827 375,473 14,827 375,473 14,827 390,301 14,827 390,301 8,947 399,247 10,276 400,577 8,947 408,194 10,276 410,853 0.813616 8,947 417,141 10,276 421,129 8,947 426,087 10,276 431,4058,947 435,034 10,276 441,681

8,947 443,981 10,276 451,957 8,947 452,927 10,276 462,233 8,947 461,874 10,276 472,509 8,947 470,821 10,276 482,786 8,947 479,767 10,276 493,062 8,947 488,714 10,276 503,338 8,947 497,661 10,276 513,614 8,947 506,608 10,276 523,890 8,947 515,554 10,276 534,166

515,554 534,166

**i.e., assuming Navajo Nation elects to purchase 170 MW, and capacity icnrease also include 19 MW to make up for LADWP and NV Energy shortfall from 1 750 MW unit Under A2, close one unit, increase capacity by 170 + 19 MW = capacity reduction of 750 - 170 MW - 19 MW = 561 MW** 0

100,000 200,000 300,000 400,000 500,000 600,000200920102011201220132014201520162017201820192020202120222023202420252026202720282029203020312032203320342035203620372038203920402041204220432044**C u** **m u** **l a** **t i** **v e** **N O** **x E** **m i** **s s** **i o** **n s** 

**Year**



# Comparison of NOx Cap with TWG Alternative A2 (1 unit closes plus **maximum capacity incr ease (189 MW) in 2020; and R**  **emaining 2 units** 

**meet 0.07 lb/MMBtu in 2031)**

Glide Path to Cap

BART

Est TWG A3 NOx Cap over 2009

- 2044Actual CAMD data Avg NOx 01-08 34,152

Installation years Avg Heat Input 01-12 188,184,226 Avg NOx rate 11-12 Avg Heat Input 01-08 194,373,910

Year Actual

Emissions **5-yr BART as**

**if LNB not yet installed**  **BART Glide Path to**  **Cap Alt B**  **Alt B**

install years by 7/1/19 cumulative cumulative Est cumulative 2001 34,019 34,019 2002 35,569 35,569 2003 31,620 31,620 2004 33,986 33,986 2005 33,221 33,221 2006 34,744 34,744 2007 35,253 35,253 2008 34,803 34,803 2009 30,501 34,152 34,152 34,152 30,501 2010 24,427 34,152 68,304 53,288 24,427 2011 19,837 34,152 102,456 72,423 19,837 2012 16,468 34,152 136,608 91,559 23,325 2013 34,152 170,759 110,695 23,325 2014 34,152 204,911 129,830 23,325 2015 34,152 239,063 148,966 23,325 2016 34,152 273,215 168,101 23,325 2017 34,152 307,367 187,237 23,325 2018 34,152 341,519 206,373 23,325 2019 19,749 361,268 225,508 23,325 2020 5,345 366,613 244,644 15,550 2021 5,345 371,958 263,780 15,550 2022 5,345 377,304 282,915 15,550 2023 5,345 382,649 302,051 15,550 2024 5,345 387,994 321,187 15,550 2025 5,345 393,339 340,322 15,550 2026 5,345 398,685 359,458 15,550 2027 5,345 404,030 378,594 15,550 2028 5,345 409,375 397,729 15,550 2029 5,345 414,720 416,865 15,550 2030 5,345 420,066 422,067 2031 5,345 425,411 427,270 2032 5,345 430,756 432,472 2033 5,345 436,101 437,674 2034 5,345 441,447 442,876 2035 5,345 446,792 448,079 2036 5,345 452,137 453,281 2037 5,345 457,482 458,483 416,8652038 5,345 462,828 463,686

2039 5,345 468,173 468,888 2040 5,345 473,518 474,090 2041 5,345 478,864 479,292 2042 5,345 484,209 484,495 2043 5,345 489,554 489,697 2044 5,345 494,899 494,899

sum (09-44) **494,899**

slope (2029 cap) 19,136 slope (2044 cap) 5,202 494,899NOx limit 0.24 Avg NOx rate 11-12 0.21

**Est. 3 SCR meeting**  **0.055 Est. 3 SCR** 

**meeting 0.055**  **Est. 3 SCR**

**meeting 0.07**  **Est. 3 SCR**

**meeting 0.07**  cumulative cumulative

30,501 30,501 30,501 30,501 24,427 54,928 24,427 54,928 19,837 74,765 19,837 74,765 16,468 91,233 16,468 91,233 19,752 110,985 19,752 110,985 19,752 130,737 19,752 130,737 19,752 150,489 19,752 150,489 19,752 170,241 19,752 170,241 19,752 189,993 19,752 189,993 19,752 209,745 19,752 209,745 19,752 229,497 19,752 229,497 19,752 249,249 19,752 249,249 19,752 269,001 19,752 269,001 19,752 288,753 19,752 288,753 19,752 308,505 19,752 308,505 19,752 328,258 19,752 328,258 19,752 348,010 19,752 348,010 19,752 367,762 15,874 363,883 19,752 387,514 11,338 375,222 15,388 402,902 6,803 382,025 10,367 413,268 6,803 388,828 5,345 418,613 6,803 395,631 5,345 423,959 6,803 402,434 5,345 429,304 6,803 409,237 5,345 434,649 6,803 416,040 5,345 439,995 6,803 422,844 5,345 445,340 6,803 429,647 5,345 450,685 6,803 436,450 5,345 456,030 6,803 443,2535,345 461,376 6,803 450,056

5,345 466,721 6,803 456,859 5,345 472,066 6,803 463,662 5,345 477,412 6,803 470,465 5,345 482,757 6,803 477,268 5,345 488,102 6,803 484,071 5,345 493,447 6,803 490,8740

100,000 200,000 300,000 400,000 500,000 600,000200920102011201220132014201520162017201820192020202120222023202420252026202720282029203020312032203320342035203620372038203920402041204220432044**C u** **m u** **l a** **t i** **v e** **N O** **x E** **m i** **s s** **i o** **n s** 

**Year** 

# Comparison of Nested NOx Caps with TWG Alternative B (assuming

**ins tallation**  **of 3 SCR to meet Nested Caps)**

Glide Path to Cap

BART Est. 3 SCR meeting 0.055 Est. 3 SCR meeting 0.07 NOx Cap over 2009

- 2044

NOx Cap over 2009

- 2029Unit # Year 2009 3 2009 2010 2 2010 2011 1 2011 2012 3 2012 2013 2 2013 2014 1 2014 2015 3 2015 2016 2 2016 2017 1 2017 2018 3 2018 2019 2 2019 2020 1 2020 2021 3 2021 2022 2 2022 2023 1 2023 2024 3 2024 2025 2 2025 2026 1 2026 2027 3 2027 2028 2 2028 2029 1 2029

Major Major

Minor

Major

Minor

Major

MinorSummary of Visibility Modeling Results - visibility method 8b and ammonia scenario 1

Scaled 2009 and 2010 From document titled: "NGS_NFR_visibility_results_140311.xlsx" 

## Visibility Impact of NGS on:

Year BART TWG A1 TWG A2 TWG A3 BART TWG A1 TWG A2 TWG A3 2001 4.48 4.48 4.48 4.48 4.94 4.94 4.94 4.94 2002 4.48 4.48 4.48 4.48 4.94 4.94 4.94 4.94 2003 4.48 4.48 4.48 4.48 4.94 4.94 4.94 4.94 2004 4.48 4.48 4.48 4.48 4.94 4.94 4.94 4.94 2005 4.48 4.48 4.48 4.48 4.94 4.94 4.94 4.94 2006 4.48 4.48 4.48 4.48 4.94 4.94 4.94 4.94 2007 4.48 4.48 4.48 4.48 4.94 4.94 4.94 4.94 2008 4.48 4.48 4.48 4.48 4.94 4.94 4.94 4.94 2009 4.48 4.48 4.48 4.48 4.94 4.94 4.94 4.94 2010 4.48 3.93 3.93 3.93 4.94 4.40 4.40 4.40 2011 4.48 3.38 3.38 3.38 4.94 3.86 3.86 3.86 2012 4.48 2.83 2.83 2.83 4.94 3.32 3.32 3.32 2013 4.48 2.83 2.83 2.83 4.94 3.32 3.32 3.32 2014 4.48 2.83 2.83 2.83 4.94 3.32 3.32 3.32 2015 4.48 2.83 2.83 2.83 4.94 3.32 3.32 3.32 2016 4.48 2.83 2.83 2.83 4.94 3.32 3.32 3.32 2017 4.48 2.83 2.83 2.83 4.94 3.32 3.32 3.32 2018 4.48 2.83 2.83 2.83 4.94 3.32 3.32 3.32 2019 4.48 2.83 2.83 2.83 4.94 3.32 3.32 3.32 2020 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2021 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2022 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2023 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2024 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2025 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2026 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2027 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2028 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2029 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2030 1.07 1.98 2.2 2.2 1.35 2.41 2.62 2.62 2031 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2032 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2033 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2034 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2035 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2036 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2037 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2038 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2039 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2040 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 Arches Bryce2041 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39

2042 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2043 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39 2044 1.07 0.83 0.93 1.09 1.35 1.05 1.18 1.39BART TWG A1 TWG A2 TWG A3 BART TWG A1 TWG A2 TWG A3 BART

6.05 6.05 6.05 6.05 7.71 7.71 7.71 7.71 8.42 6.05 6.05 6.05 6.05 7.71 7.71 7.71 7.71 8.42 6.05 6.05 6.05 6.05 7.71 7.71 7.71 7.71 8.42 6.05 6.05 6.05 6.05 7.71 7.71 7.71 7.71 8.42 6.05 6.05 6.05 6.05 7.71 7.71 7.71 7.71 8.42 6.05 6.05 6.05 6.05 7.71 7.71 7.71 7.71 8.42 6.05 6.05 6.05 6.05 7.71 7.71 7.71 7.71 8.42 6.05 6.05 6.05 6.05 7.71 7.71 7.71 7.71 8.42 6.05 6.05 6.05 6.05 7.71 7.71 7.71 7.71 8.42 6.05 5.35 5.35 5.35 7.71 7.00 7.00 7.00 8.42 6.05 4.65 4.65 4.65 7.71 6.29 6.29 6.29 8.42 6.05 3.95 3.95 3.95 7.71 5.58 5.58 5.58 8.42 6.05 3.95 3.95 3.95 7.71 5.58 5.58 5.58 8.42 6.05 3.95 3.95 3.95 7.71 5.58 5.58 5.58 8.42 6.05 3.95 3.95 3.95 7.71 5.58 5.58 5.58 8.42 6.05 3.95 3.95 3.95 7.71 5.58 5.58 5.58 8.42 6.05 3.95 3.95 3.95 7.71 5.58 5.58 5.58 8.42 6.05 3.95 3.95 3.95 7.71 5.58 5.58 5.58 8.42 6.05 3.95 3.95 3.95 7.71 5.58 5.58 5.58 8.42 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 2.81 3.09 3.1 2.36 4.27 4.6 4.59 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16

Canyonlands Capitol Reef1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16

1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16 1.52 1.2 1.34 1.56 2.36 1.88 2.09 2.42 3.16TWG A1 TWG A2 TWG A3 BART TWG A1 TWG A2 TWG A3 BART TWG A1

8.42 8.42 8.42 1.46 1.46 1.46 1.46 3.23 3.23 8.42 8.42 8.42 1.46 1.46 1.46 1.46 3.23 3.23 8.42 8.42 8.42 1.46 1.46 1.46 1.46 3.23 3.23 8.42 8.42 8.42 1.46 1.46 1.46 1.46 3.23 3.23 8.42 8.42 8.42 1.46 1.46 1.46 1.46 3.23 3.23 8.42 8.42 8.42 1.46 1.46 1.46 1.46 3.23 3.23 8.42 8.42 8.42 1.46 1.46 1.46 1.46 3.23 3.23 8.42 8.42 8.42 1.46 1.46 1.46 1.46 3.23 3.23 8.42 8.42 8.42 1.46 1.46 1.46 1.46 3.23 3.23 7.78 7.78 7.78 1.46 1.26 1.26 1.26 3.23 2.78 7.15 7.15 7.15 1.46 1.06 1.06 1.06 3.23 2.33 6.51 6.51 6.51 1.46 0.86 0.86 0.86 3.23 1.88 6.51 6.51 6.51 1.46 0.86 0.86 0.86 3.23 1.88 6.51 6.51 6.51 1.46 0.86 0.86 0.86 3.23 1.88 6.51 6.51 6.51 1.46 0.86 0.86 0.86 3.23 1.88 6.51 6.51 6.51 1.46 0.86 0.86 0.86 3.23 1.88 6.51 6.51 6.51 1.46 0.86 0.86 0.86 3.23 1.88 6.51 6.51 6.51 1.46 0.86 0.86 0.86 3.23 1.88 6.51 6.51 6.51 1.46 0.86 0.86 0.86 3.23 1.88 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 5.11 5.47 5.46 0.39 0.57 0.64 0.64 0.66 1.28 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 Grand Canyon Mazatzal Mesa Verde2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51

2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51 2.53 2.81 3.16 0.39 0.3 0.33 0.36 0.66 0.51TWG A2 TWG A3 BART TWG A1 TWG A2 TWG A3 BART TWG A1 TWG A2

3.23 3.23 3.38 3.38 3.38 3.38 1.32 1.32 1.32 3.23 3.23 3.38 3.38 3.38 3.38 1.32 1.32 1.32 3.23 3.23 3.38 3.38 3.38 3.38 1.32 1.32 1.32 3.23 3.23 3.38 3.38 3.38 3.38 1.32 1.32 1.32 3.23 3.23 3.38 3.38 3.38 3.38 1.32 1.32 1.32 3.23 3.23 3.38 3.38 3.38 3.38 1.32 1.32 1.32 3.23 3.23 3.38 3.38 3.38 3.38 1.32 1.32 1.32 3.23 3.23 3.38 3.38 3.38 3.38 1.32 1.32 1.32 3.23 3.23 3.38 3.38 3.38 3.38 1.32 1.32 1.32 2.78 2.78 3.38 2.91 2.91 2.91 1.32 1.14 1.14 2.33 2.33 3.38 2.45 2.45 2.45 1.32 0.96 0.96 1.88 1.88 3.38 1.98 1.98 1.98 1.32 0.78 0.78 1.88 1.88 3.38 1.98 1.98 1.98 1.32 0.78 0.78 1.88 1.88 3.38 1.98 1.98 1.98 1.32 0.78 0.78 1.88 1.88 3.38 1.98 1.98 1.98 1.32 0.78 0.78 1.88 1.88 3.38 1.98 1.98 1.98 1.32 0.78 0.78 1.88 1.88 3.38 1.98 1.98 1.98 1.32 0.78 0.78 1.88 1.88 3.38 1.98 1.98 1.98 1.32 0.78 0.78 1.88 1.88 3.38 1.98 1.98 1.98 1.32 0.78 0.78 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 1.43 1.43 0.74 1.35 1.51 1.5 0.33 0.53 0.59 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 Mesa Verde Petrified Forest Pine Mountain0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28

0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28 0.57 0.67 0.74 0.57 0.64 0.72 0.33 0.25 0.28TWG A3 BART TWG A1 TWG A2 TWG A3 BART TWG A1 TWG A2 TWG A3

1.32 2.41 2.41 2.41 2.41 4.42 4.42 4.42 4.42 1.32 2.41 2.41 2.41 2.41 4.42 4.42 4.42 4.42 1.32 2.41 2.41 2.41 2.41 4.42 4.42 4.42 4.42 1.32 2.41 2.41 2.41 2.41 4.42 4.42 4.42 4.42 1.32 2.41 2.41 2.41 2.41 4.42 4.42 4.42 4.42 1.32 2.41 2.41 2.41 2.41 4.42 4.42 4.42 4.42 1.32 2.41 2.41 2.41 2.41 4.42 4.42 4.42 4.42 1.32 2.41 2.41 2.41 2.41 4.42 4.42 4.42 4.42 1.32 2.41 2.41 2.41 2.41 4.42 4.42 4.42 4.42 1.14 2.41 2.11 2.11 2.11 4.42 3.96 3.96 3.96 0.96 2.41 1.82 1.82 1.82 4.42 3.51 3.51 3.51 0.78 2.41 1.52 1.52 1.52 4.42 3.05 3.05 3.05 0.78 2.41 1.52 1.52 1.52 4.42 3.05 3.05 3.05 0.78 2.41 1.52 1.52 1.52 4.42 3.05 3.05 3.05 0.78 2.41 1.52 1.52 1.52 4.42 3.05 3.05 3.05 0.78 2.41 1.52 1.52 1.52 4.42 3.05 3.05 3.05 0.78 2.41 1.52 1.52 1.52 4.42 3.05 3.05 3.05 0.78 2.41 1.52 1.52 1.52 4.42 3.05 3.05 3.05 0.78 2.41 1.52 1.52 1.52 4.42 3.05 3.05 3.05 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.59 0.62 1.02 1.15 1.14 1.14 2.16 2.4 2.39 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 Sycamore Zion0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18

0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18 0.3 0.62 0.46 0.51 0.59 1.14 0.9 1.01 1.18BART TWG A1 TWG A2 TWG A3

47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 47.82 42.63 42.63 42.63 47.82 37.45 37.45 37.45 47.82 32.26 32.26 32.26 47.82 32.26 32.26 32.26 47.82 32.26 32.26 32.26 47.82 32.26 32.26 32.26 47.82 32.26 32.26 32.26 47.82 32.26 32.26 32.26 47.82 32.26 32.26 32.26 47.82 32.26 32.26 32.26 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 23.49 25.70 25.66 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 Cumulative (11 Class I areas)13.34 10.48 11.69 13.44

13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.44 13.34 10.48 11.69 13.440

10 20 30 40 50 6020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023202420252026202720282029203020312032203320342035203620372038203920402041204220432044**C u** **m u** **l a** **t i** **v e** **d e** **c i** **v e** **w i** **m p** **a c** **t o** **f N** **G S** **o n** **1 1** **C l** **a s** **s I** **A r** **e a** **s**



### Ye **ar** 

# Anticipated **Visibility Impact of NGS on 11 Class I Ar**  **eas: BART and TWG**

BART

TWG A1

TWG A2

TWG A3 TWG is better than BART

BART is better than TWG

TWG is better than BART **LNB/SOFA Credit** 

**TWG Step 3**  **: Two units meet 0.07**  **lb./MMBtu limit**  **TWG Step 2**  **: Closure or**  **Curtailment TWG Step**  **1 : Early**  **install of LNB/SOFA**

**BART : Thre**  **e units meet 0.055**  **lb/MMBtu limit**