## AFUDC Rate**8.15% Last Cash Exp.**  **Total Total**  **COD Final Month**  **(2012 $) (Actual$)**  **2012 2013**  **2014 2015**  **2016 2017**  **2018 Total** 

C3 SNCR Spring 2015 27-Mar-2015 Jun-15 12,995 13,669 2,304 8,072 3,293 13,669 AFUDC 94 524 258 876 Total 2,397 8,596 3,551 14,544

C2 SNCR Fall 2015 11-Dec-2015 Mar-16 13,087 13,820 2,317 5,968 5,535 13,820 AFUDC 94 440 866 1,400 Total 2,411 6,408 6,400 15,219

C4 SNCR Spring 2016 1-Apr-2016 Jun-16 20,075 21,562 1,014 4,808 10,690 5,049 21,562 AFUDC 41 282 936 414 1,673 Total 1,055 5,090 11,627 5,463 23,235

C4 SCR Spring 2017 1-Apr-2017 Jun-17 113,750125,141 2,332 5,07930,62454,93232,174 125,141 AFUDC 95 405 1,893 5,533 2,383 10,309 Total 2,427 5,48432,51760,465 34,558 135,450

C2 SCR Fall 2017 15-Dec-2017 Mar-18 83,23193,276 1,749 6,61028,71044,141 12,065 93,276 AFUDC 71 418 1,891 5,014 1,928 9,322 Total 1,820 7,02830,60149,155 13,994 102,598

C3 SCR Spring 2018 30-Mar-2018 Jun-18 83,23193,899 459 35 3,600 4,50822,96838,19924,131 93,899 AFUDC 19 40 192 538 1,701 4,332 1,806 8,629 Total 478 75 3,792 5,04624,66942,531 25,937 102,528 

## Cholla SNCR and SCR Cash Flows and AFUDC Rev 4

($000)

090000648116a0e9.xlsx [C234 SCR AFUDC Rev 4 SEND] 

### CONFIDENTIAL

## Reduce By Four Corners Unit 3 SCR Capital from BART $99,313,000 Deduct for CEMS & Lost Revenue $3,326,000100.0%($3,326,000) Deduct for LNB $2,890,000100.0%($2,890,000) Total Capital for 3+1 SCR $93,097,000

Reactor Housing & Installation $539,60025.0% ($134,900) Catalyst $2,968,75033.3% ($988,594) Initial Urea $277,00033.3% ($92,241) Foundations & Supports $6,924,80025.0%($1,731,200) Handling & Erection $5,650,40025.0%($1,412,600) Piling $500,00025.0% ($125,000) Taxes on Capital (7%) ($313,917) Freight on Capital (5%) ($224,227) Contingency (15% of all the above) ($753,402) Total Capital for 2+1 SCR $87,320,919

Increase for 3+1 over 2+1 1.066 

# Capital Cost Increase for Additional Catalyst Layer**Preliminary**

**APS Cholla A naly** **sis - Cost A naly** **sis DLH DRAFT**  **Unit:** 2 **Technology:** Selective Non-Catalytic Reduction **Date:** 7/25/2012 Costs are per Unit **Cost Item $**  **Remarks**

CAPITAL COST Direct Costs Purchased Equipment & Materials Reagent storage, handling, injection & controls $0 SNCR Equipment $730,000 Nox Monitoring System $0 Air preheater mods & Boiler Wall penetrations $920,000 BOP Equipment & Materials $201,000 Electrical $13,000 Instrumentation & Controls $0 Subtotal direct equipment & materials (CC) $1,864,000

Miscellaneous Direct installation costs

SNCR Equipment Erection $324,000 Air Preheater mods/Boiler Wall Penetrations $810,000 General Civil & Mechanical Construction $289,000 Electrical Construction $37,000 Insulation $72,000 Painting $28,000 Demolition $0 Relocation $0 Total direct installation costs (DIC) $1,560,000

Total direct costs (DC) = (CC) + (DIC) $3,424,000

Indirect Costs Engineering $584,000 Owners Cost $684,800 20% of DIC Construction and field expenses $2,159,428 Start-up $125,000 Performance test $335,000 Miscellaneous Indirect Costs $140,000 Contingency (EPC) $964,864 15% of EPC Costs FEE (EPC) $643,243 10% of EPC Costs Owner's Contingency $906,000 10% of Total Capital Investment Total indirect costs (IC) $6,542,000
Total Capital Investment (TCI) = (DC) + (IC) **$9,966,000**

ANNUAL COST Direct Annual Costs Fixed annual costs Operating labor $38,000 30% of 2 hours/shift at $50/hr+15% Supv. Maintenance labor and materials $66,000 30% of 2 hours/shift at $50/hr x2 for mat'l Total fixed annual costs $104,000

Variable annual costs Reagent $1,061,000 @115.3 gph 50% & $500/ton 100% Fly Ash diposal $3,436,000 @ 16 $/ton x 55,500 lb/hr Auxiliary Power $2,000 @ .05 $/kW x 7 hp Water $0 Total variable annual costs $4,499,000
Total direct annual costs (DAC) $4,603,000 Total direct annual costs $5,339,000 1.16Levelization Factor

Indirect Annual Costs Cost for capital recovery $947,000 @ 7.1 % interest rate , CRF is 9.5

Total indirect annual costs (IDAC) $947,000 & 20 year life
Total Annual Cost (TAC) = (DAC) + (IDAC) **$5,550,000** Total Annual Cost with Levelization Factor $6,286,000**Preliminary**

**AP S Cholla A** **naly**

**sis - Cost A naly** 

**sis DLH DRAFT**  **Unit:** 3 **Technology:** Selective Non-Catalytic Reduction **Date:** 7/25/2012 Costs are per Unit **Cost Item $**  **Remarks**

CAPITAL COST Direct Costs Purchased & Installed Equipment & Materials Reagent storage, handling, injection & controls $0 SNCR Equipment $730,000 Nox Monitoring System $0 Air preheater mods & Boiler Wall penetrations $920,000 BOP Equipment & Materials $255,000 Electrical $15,000 Instrumentation & Controls $0
Subtotal direct equipment & materials (CC) $1,920,000

Miscellaneous Direct installation costs

SNCR Equipment Erection $324,000 Air Preheater mods/Boiler Wall Penetrations $810,000 General Civil & Mechanical Construction $289,000 Electrical Construction $42,000 Insulation $72,000 Painting $28,000 Demolition $0 Relocation $0 Total direct installation costs (DIC) $1,565,000

Total direct costs (DC) = (CC) + (DIC) $3,485,000

Indirect Costs Engineering $584,000 Owners Cost $697,000 20% of DIC Construction and field expenses $2,021,000 Start-up $125,000 Performance test $335,000 Miscellaneous Indirect Cost $140,000 Contingency (EPC) $953,250 15% of EPC Costs FEE (EPC) $635,500 10% of EPC Costs Owner's Contingency $898,000 10% of Total Capital Investment Total indirect costs (IC) $6,389,000
Total Capital Investment (TCI) = (DC) + (IC) **$9,874,000**

ANNUAL COST Direct Annual Costs Fixed annual costs Operating labor $38,000 30% of 2 hours/shift at $50/hr+15% Supv. Maintenance labor and materials $66,000 30% of 2 hours/shift at $50/hr x2 for mat'l Total fixed annual costs $104,000

Variable annual costs Reagent $1,061,000 @115.3 gph 50% & $500/ton 100% Fly Ash diposal $3,436,000 @ 16 $/ton x 55,500 lb/hr Auxiliary Power $2,000 @ .05 $/kWx 7 hp Water $0 Total variable annual costs $4,499,000
Total direct annual costs (DAC) $4,603,000 Total direct annual costs $5,339,000 1.16Levelization Factor

Indirect Annual Costs Cost for capital recovery $938,000 @ 7.1 % interest rate , CRF is 9.5

Total indirect annual costs (IDAC) $938,000 & 20 year life
Total Annual Cost (TAC) = (DAC) + (IDAC) **$5,541,000** Total Annual Cost with Levelization Factor $6,277,000**Preliminary**

**AP S Cholla A** **naly**

**sis - Cost A naly** 

**sis DLH DRAFT**  **Unit:** Common **Technology:** Selective Non-Catalytic Reduction **Date:** 7/25/2012 Costs are per Unit **Cost Item $**  **Remarks**

CAPITAL COST Direct Costs Purchased Equipment & Materials Reagent storage, handling, injection & controls $1,547,000 Added $41,000 for larger tanks SNCR Equipment $0 Nox Monitoring System 0 Air preheater mods & Boiler Wall penetrations $0 BOP Equipment & Materials $210,000 Electrical $421,000 Instrumentation & Controls $75,000 Subtotal direct equipment & materials (CC) $2,253,000

MiscellaneousDirect installation costs

Sitework $170,000 Foundations $273,000 Added $9000 for some add'l piles/fdns Mechanical Construction $288,000 Electrical Constructio $238,000 Instrumentation & Controls Construction $6,000 Insulation $33,000 Painting $18,000 Demolition $11,000
Total direct installation costs (DIC) $1,037,000

Total direct costs (DC) = (CC) + (DIC) $3,290,000

Indirect Costs Engineering $584,000 Owners Cost $1,658,000 $1MM - Owner's Engr+20% of Total DIC Construction and field expenses $1,744,000 Start-up $50,000 Performance test $63,000 Miscellaneous Indirect Costs $124,000 Contingency (EPC) $868,800 15% of EPC Costs FEE (EPC) $579,200 10% of EPC Costs Owner's Contingency $896,000 10% of Total Capital Investment Total indirect costs (IC) $6,567,000
Total Capital Investment (TCI) = (DC) + (IC) **$9,857,000**

ANNUAL COST Direct Annual Costs Fixed annual costs Operating labor $50,000 40% of 2 hours/shift at $50/hr+15% Supv. Maintenance labor and materials $88,000 40% of 2 hours/shift at $50/hr x2 for mat'l Total fixed annual costs $138,000

Variable annual costs Reagent $0 @ 471.58 $/ton x 0 lb/hr Fly Ash diposal $0 @ 16 $/ton x 0 lb/hr Auxiliary Power $33,000 @ .05 $/kWx 84 kWcontinuous (avg) Demin. Water $4,000 @ .0034 $/gal x 2.6 gpm Total variable annual costs $37,000
Total direct annual costs (DAC) $175,000 Total direct annual costs $203,000 1.16Levelization Factor

Indirect Annual Costs Cost for capital recovery $936,000 @ 7.1 % interest rate , CRF is 9.5

Total indirect annual costs (IDAC) $936,000 & 20 year life
Total Annual Cost (TAC) = (DAC) + (IDAC) **$1,111,000** Total Annual Cost with Levelization Factor $1,139,000C2 Loads (surcharge) CC Loads Unit 2 LNB/SOFA SNCR* SCR* LNB/SOFA SNCR NH3 PlantSNCR* w/Plant SCR* LNB/SOFA SNCR* SCR* 0

Materials Design Supply $2,100,000 $4,500,000$30,000,000 $1,906,285 $1,864,000 $713,412 $2,577,412$36,187,449 $0 $5,778,000$53,940,000 Construction 50%$1,050,000 $2,250,000$15,000,000 $2,385,340 $6,511,200 $1,599,083 $8,110,283$18,093,725 $0 $0 $0 Balance of Plant 50%$1,050,000 $2,250,000$15,000,000 incl incl incl incl$18,093,725 $0 $0 $0 Electrical 5% $105,000 $225,000 $1,500,000 incl incl incl incl$1,809,372 $0 $0 $0 Owner's Costs 10% $210,000 $450,000 $3,000,000 $620,343 $684,800 $525,006 $1,209,806 $3,618,745 $0 $0 $0 Surcharge 16% $336,000 $720,000 $4,800,000 $156,741 $275,703 $1,245,114 $1,520,818 $1,757,624 $0 $0 $0 LNB/SOFA WA30-9484 Mar-081.10381289escalation factpr to 2012 AFUDC 12% $252,000 $540,000 $3,600,000 incl$1,399,747 $0 $1,399,747 $9,322,098 $0 $0 $0 Subtotal $5,103,000$10,935,000$72,900,000 $5,068,709$10,735,451 $4,082,615 $14,818,066$88,882,738 $0 $5,778,000$53,940,000 Checks Contingency 15% $315,000 $675,000 $4,500,000 $0 $906,000 $283,718 $1,189,718 $5,428,000 $0 $0 $0 $9,966,000$3,121,219 **$13,087,219**SNCR OK TOTAL $5,418,000$11,610,000$77,400,000 $5,068,709$11,641,451 $4,366,333 $16,007,784$94,310,738 $0 $5,778,000$53,940,000 **$83,231,015**SCR OK

C3 Loads (surcharge) CC Loads Unit 3 LNB/SOFA SNCR* SCR* LNB/SOFA SNCR NH3 PlantSNCR* w/Plant SCR* LNB/SOFA SNCR* SCR*

Materials Design Supply $2,100,000 $4,500,000$30,000,000 $1,686,411 $1,920,000 $713,412 $2,633,412$36,187,449 $0 $6,246,000$60,564,000 Construction 50%$1,050,000 $2,250,000$15,000,000 $2,162,396 $6,359,000 $1,599,083 $7,958,083$18,093,725 $0 $0 $0 Balance of Plant 50%$1,050,000 $2,250,000$15,000,000 incl incl incl incl$18,093,725 $0 $0 $0 Electrical 5% $105,000 $225,000 $1,500,000 incl incl incl incl$1,809,372 $0 $0 $0 Owner's Costs 10% $210,000 $450,000 $3,000,000 $469,524 $697,000 $525,006 $1,222,006 $3,618,745 $0 $0 $0 Surcharge 16% $336,000 $720,000 $4,800,000 $401,680 $273,253 $1,245,114 $1,518,367 $1,757,624 $0 $0 $0 LNB/SOFA WACHC0042 May-091.07689063escalation factpr to 2012 AFUDC 12% $252,000 $540,000 $3,600,000 incl $875,747 $0 $875,747 $8,628,728 $0 $0 $0 Subtotal $5,103,000$10,935,000$72,900,000 $4,720,012$10,125,000 $4,082,615 $14,207,615$88,189,368 $0 $6,246,000$60,564,000 Checks Contingency 15% $315,000 $675,000 $4,500,000 $0 $898,000 $283,718 $1,181,718 $5,428,000 $0 $0 $0 $9,874,000$3,121,219 **$12,995,219**SNCR OK TOTAL $5,418,000$11,610,000$77,400,000 $4,720,012$11,023,000 $4,366,333 $15,389,333$93,617,368 $0 $6,246,000$60,564,000 **$83,231,015**SCR OK

C4 loads for SNCR only. These are too high for a large SCR project - i.e. would be 30% vs 5%. CC Loads Unit 4 LNB/SOFA SNCR* SCR* LNB/SOFA SNCR NH3 PlantSNCR* w/Plant SCR* LNB/SOFA SNCR* SCR*

Materials Design Supply $2,650,000 $5,700,000$41,000,000 $2,178,927 $3,200,897 $825,950 $4,026,846$49,456,180 $0 $8,280,000$73,859,000 Construction 50%$1,325,000 $2,850,000$20,500,000 $2,868,810$10,601,303 $1,851,330 $12,452,633$24,728,090 $0 $0 $0 Balance of Plant 50%$1,325,000 $2,850,000$20,500,000 incl incl incl incl$24,728,090 $0 $0 $0 Electrical 5% $133,000 $285,000 $2,050,000 incl incl incl incl$2,472,809 $0 $0 $0 Owner's Costs 10% $265,000 $570,000 $4,100,000 $321,210 $1,161,992 $607,823 $1,769,815 $4,945,618 $0 $0 $0 Surcharge 16% $424,000 $912,000 $6,560,000 $65,125 $455,549 $1,441,525 $1,897,074 $2,402,087 $0 $0 $0 AFUDC 12% $318,000 $684,000 $4,920,000 incl$1,673,280 $0 $1,673,280$10,309,193 $0 $0 $0 LNB/SOFA WACHC0048 May-081.10381289escalation factpr to 2012 Subtotal $6,440,000$13,851,000$99,630,000 $5,434,071$17,093,021 $4,726,628 $21,819,649$119,042,067 $0 $8,280,000$73,859,000 Contingency 15% $398,000 $855,000 $6,150,000 $0 $1,541,974 $283,718 $1,825,692 $7,418,427 $0 $0 $0 Checks TOTAL $6,838,000$14,706,000$105,780,000 $5,434,071$18,634,995 $5,010,346 $23,645,341$126,460,494 $0 $8,280,000$73,859,000 $16,506,166$3,568,821 **$20,074,987**SNCR OK **$113,749,215**SCR OK C4 SNCR Correction Factor = (C3)2012study / (C3)2007BART *Following LNB/SOFA, and excluding LNB/SOFA costs EPA

EPA

EPA Cholla CH2M HILL vs. EPA NOx BART Capital

CH2M HILL APS (2012$) APS (2012$) CH2M HILL

CH2M HILL APS (2012$)

090000648116a0e9.xlsx 11/16/2012Unit 2 LNB/SOFA SNCR* SCR* LNB/SOFA SNCR* SCR* LNB/SOFA SNCR* SCR* Operating Labor $30,000 $30,000 $45,000 $30,000 $30,000 $45,000 $0 $1,936,916 $2,383,481 Maintenance Material $60,000 $60,000 $90,000 $60,000 $60,000 $90,000 $0 $0 $0 Maintenance Labor $30,000 $30,000 $45,000 $30,000 $30,000 $45,000 $0 $0 $0 Administrative Labor $0 $0 $0 $0 $0 $0 $0 $0 $0 Makeup Water $0 $0 $0 $0 $0 $0 $0 $0 $0 Reagent $0 $195,139 $398,813 $0 $195,139 $398,813 $0 $0 $0 Catalyst $0 $0 $450,000 $0 $0 $450,000 $0 $0 $0 Waste Disposal $0 $0 $0 $0 $0 $0 $0 $0 $0 Electric Power $0 $119,574 $597,870 $0 $119,574 $597,870 $0 $0 $0 TOTAL $120,000 $434,713 $1,626,683 $120,000 $434,713 $1,626,683 $0 $1,936,916 $2,383,481

Unit 3 LNB/SOFA SNCR* SCR* LNB/SOFA SNCR* SCR* LNB/SOFA SNCR* SCR*

Materials Design Supply $30,000 $30,000 $45,000 $30,000 $30,000 $45,000 $0 $1,940,933 $2,396,330 Construction $60,000 $60,000 $90,000 $60,000 $60,000 $90,000 $0 $0 $0 Balance of Plant $30,000 $30,000 $45,000 $30,000 $30,000 $45,000 $0 $0 $0 Electrical $0 $0 $0 $0 $0 $0 $0 $0 $0 Owner's Costs $0 $0 $0 $0 $0 $0 $0 $0 $0 Surcharge $0 $183,852 $375,746 $0 $183,852 $375,746 $0 $0 $0 AFUDC $0 $0 $450,000 $0 $0 $450,000 $0 $0 $0 Subtotal $0 $0 $0 $0 $0 $0 $0 $0 $0 Contingency $0 $113,004 $565,020 $0 $113,004 $565,020 $0 $0 $0 TOTAL $120,000 $416,856 $1,570,766 $120,000 $416,856 $1,570,766 $0 $1,940,933 $2,396,330

Unit 4 LNB/SOFA SNCR* SCR* LNB/SOFA SNCR* SCR* LNB/SOFA SNCR* SCR*

Materials Design Supply $42,500 $42,500 $63,750 $42,500 $42,500 $63,750 $0 $2,403,476 $2,923,047 Construction $85,000 $85,000 $127,500 $85,000 $85,000 $127,500 $0 $0 $0 Balance of Plant $42,500 $42,500 $63,750 $42,500 $42,500 $63,750 $0 $0 $0 Electrical $0 $0 $0 $0 $0 $0 $0 $0 $0 Owner's Costs $0 $0 $0 $0 $0 $0 $0 $0 $0 Surcharge $0 $289,706 $592,084 $0 $289,706 $592,084 $0 $0 $0 AFUDC $0 $0 $637,500 $0 $0 $637,500 $0 $0 $0 Subtotal $0 $0 $0 $0 $0 $0 $0 $0 $0 Contingency $0 $173,120 $865,598 $0 $173,120 $865,598 $0 $0 $0 TOTAL $170,000 $632,826 $2,350,182 $170,000 $632,826 $2,350,182 $0 $2,403,476 $2,923,047

*Following L

NB/SOFA, and excluding L NB/SOFA costs

CH2M HIL

L APS EPA 

## Cholla CH2M HILL vs. EPA NOx BART O&M

CH2M HIL

L APS EPA

CH2M HIL

L APS EPA

090000648116a0e9.xlsx 11/16/2012

### Unit 2 CH2M HILL Base LNB/SOFA SNCR* SCR* NOx Emissions Rate 0.5000 0.2200 0.1700 0.0700 Capacity Factor 91% 91% 91% 91% MMBTU/yr 23,420,561 23,420,561 23,420,561 23,420,561 Tons NOx Emitted 5,890 2,576 1,991 820 Tons NOx Removed/yr 0 3,314 585 1,756 Total First Year Cost** N/A $635,252 $1,538,824 $8,987,423 $/T of NOx N/A $192 $2,630 $5,118

Unit 3 CH2M HILL Base LNB/SOFA SNCR* SCR*

NOx Emissions Rate 0.4100 0.2200 0.1700 0.0700 Capacity Factor 86% 86% 86% 86% MMBTU/yr 22,065,914 22,065,914 22,065,914 22,065,914 Tons NOx Emitted 4,524 2,427 1,876 772 Tons NOx Removed/yr 0 2,097 551 1,655 Total First Year Cost** N/A $635,252 $1,520,967 $8,931,506 $/T of NOx N/A $303 $2,760 $5,397

Unit 4 CH2M HILL Base LNB/SOFA SNCR* SCR*

NOx Emissions Rate 0.4200 0.2200 0.1700 0.0700 Capacity Factor 93% 93% 93% 93% MMBTU/yr 34,770,542 34,770,542 34,770,542 34,770,542 Tons NOx Emitted 7,215 3,825 2,955 1,217 Tons NOx Removed/yr 0 3,390 870 2,608 Total First Year Cost** N/A $820,294 $2,031,367$12,409,860 $/T of NOx N/A $242 $2,335 $4,758

*Following LNB/SOFA, and excluding LNB/SOFA NOx reductions and costs **9.51% CRF 

# Cholla CH2M HILL NOx BART Emissions/Costs

090000648116a0e9.xlsx 11/16/2012

### Unit 2 LNB/SOFA* SNCR** SCR** NOx Emissions Rate 0.2200 0.1700 0.0700 Capacity Factor 91% 91% 91% MMBTU/yr 23,420,561 23,420,561 23,420,561 Tons NOx Emitted 2,576 1,991 820 Tons NOx Removed/yr N/A 585 1,756 Incremental Tons NOx Removed/yr N/A N/A 1,171 Total First Year Cost N/A $1,538,824 $8,987,423 Incremental First Year Cost N/A N/A $7,448,599 $/T of NOx N/A $2,630 $5,118 Incremental $/T of NOx N/A N/A $6,361

Unit 3 LNB/SOFA* SNCR** SCR**

NOx Emissions Rate 0.2200 0.1700 0.0700 Capacity Factor 86% 86% 86% MMBTU/yr 22,065,914 22,065,914 22,065,914 Tons NOx Emitted 2,427 1,876 772 Tons NOx Removed/yr N/A 551 1,655 Incremental Tons NOx Removed/yr N/A N/A 1,104 Total First Year Cost N/A $1,520,967 $8,931,506 Incremental First Year Cost N/A N/A $7,410,539 $/T of NOx N/A $2,760 $5,397 Incremental $/T of NOx N/A N/A $6,712



# Table 19 Cholla (CH2M HIL)

Unit 4 LNB/SOFA* SNCR** SCR**

NOx Emissions Rate 0.2200 0.1700 0.0700 Capacity Factor 93% 93% 93% MMBTU/yr 34,770,542 34,770,542 34,770,542 Tons NOx Emitted 3,825 2,955 1,217 Tons NOx Removed/yr N/A 870 2,608 Incremental Tons NOx Removed/yr N/A N/A 1,738 Total First Year Cost N/A $2,031,367$12,409,860 Incremental First Year Cost N/A N/A$10,378,493 $/T of NOx N/A $2,335 $4,758 Incremental $/T of NOx N/A N/A $5,972

*Assume LNB/SOFA is baseline **Following LNB/SOFA, and excluding LNB/SOFA NOx reductions and costs

090000648116a0e9.xlsx 11/16/2012

### (lb/hr) (tpy) Ave Incremental (from previous)

OFA LNB+OFA (baseline) 0.220 646 2,576

............................................................ SNCR+LNB+OFA 0.170 500 1,991 585 1,538,824 2,630

............... SCR+LNB+OFA 0.070 206 820 1,756 8,987,423 5,118 6,361

OFA LNB+OFA (baseline) 0.220 644 2,427

............................................................ SNCR+LNB+OFA 0.170 498 1,876 551 1,520,967 2,760

............... SCR+LNB+OFA 0.070 205 772 1,655 8,931,506 5,397 6,712

OFA LNB+OFA (baseline) 0.220 939 3,825

............................................................ SNCR+LNB+OFA 0.170 725 2,955 870 2,031,367 2,335

............... SCR+LNB+OFA 0.070 299 1,217 2,608 12,409,860 4,758 5,972 

# Table 19 - Cholla Units 2, 3, and 4: EPA's Control Cost Summary (CH2M HILL)

Control Option

NA; LNB+OFA is the currently installed technology Emission Factor (lb/MMBtu) Emission Rate Emissions removed (tpy) Annual cost

($/yr) Cost-effectiveness ($/ton)



## Cholla 2 NA; LNB+OFA is the currently installed technology



## Cholla 3 NA; LNB+OFA is the currently installed technology



## Cholla 4

090000648116a0e9.xlsx 11/16/2012

### Unit 2 CH2M HILL Base LNB/SOFA SNCR* SCR* NOx Emissions Rate 0.5000 0.2200 0.1700 0.0700 Capacity Factor 91% 91% 91% 91% MMBTU/yr 23,420,561 23,420,561 23,420,561 23,420,561 Tons NOx Emitted 5,890 2,576 1,991 820 Tons NOx Removed/yr 0 3,314 585 1,756 Total First Year Cost** N/A $602,034 $1,957,053 $10,595,634 $/T of NOx N/A $182 $3,345 $6,034

Unit 3 CH2M HILL Base LNB/SOFA SNCR* SCR*

NOx Emissions Rate 0.4100 0.2200 0.1700 0.0700 Capacity Factor 86% 86% 86% 86% MMBTU/yr 22,065,914 22,065,914 22,065,914 22,065,914 Tons NOx Emitted 4,524 2,427 1,876 772 Tons NOx Removed/yr 0 2,097 551 1,655 Total First Year Cost** N/A $568,873 $1,880,382$10,473,778 $/T of NOx N/A $271 $3,413 $6,329

Unit 4 CH2M HILL Base LNB/SOFA SNCR* SCR*

NOx Emissions Rate 0.4200 0.2200 0.1700 0.0700 Capacity Factor 93% 93% 93% 93% MMBTU/yr 34,770,542 34,770,542 34,770,542 34,770,542 Tons NOx Emitted 7,215 3,825 2,955 1,217 Tons NOx Removed/yr 0 3,390 870 2,608 Total First Year Cost** N/A $686,780 $2,881,498$14,376,575 $/T of NOx N/A $203 $3,312 $5,512

*Following LNB/SOFA, and excluding LNB/SOFA NOx reductions and costs **9.51% CRF 

# Cholla APS NOx BART Emissions/Costs

090000648116a0e9.xlsx 11/16/2012

### Unit 2 LNB/SOFA* SNCR** SCR** NOx Emissions Rate 0.2200 0.1700 0.0700 Capacity Factor 91% 91% 91% MMBTU/yr 23,420,561 23,420,561 23,420,561 Tons NOx Emitted 2,576 1,991 820 Tons NOx Removed/yr N/A 585 1,756 Incremental Tons NOx Removed/yr N/A N/A 1,171 Total First Year Cost N/A $1,957,053 $10,595,634 Incremental First Year Cost N/A N/A $8,638,581 $/T of NOx N/A $3,345 $6,034 Incremental $/T of NOx N/A N/A $7,377

Unit 3 LNB/SOFA* SNCR** SCR**

NOx Emissions Rate 0.2200 0.1700 0.0700 Capacity Factor 86% 86% 86% MMBTU/yr 22,065,914 22,065,914 22,065,914 Tons NOx Emitted 2,427 1,876 772 Tons NOx Removed/yr N/A 551 1,655 Incremental Tons NOx Removed/yr N/A N/A 1,104 Total First Year Cost N/A $1,880,382$10,473,778 Incremental First Year Cost N/A N/A $8,593,396 $/T of NOx N/A $3,413 $6,329 Incremental $/T of NOx N/A N/A $7,784



# Table 19 Cholla (APS)

Unit 4 LNB/SOFA* SNCR** SCR**

NOx Emissions Rate 0.2200 0.1700 0.0700 Capacity Factor 93% 93% 93% MMBTU/yr 34,770,542 34,770,542 34,770,542 Tons NOx Emitted 3,825 2,955 1,217 Tons NOx Removed/yr N/A 870 2,608 Incremental Tons NOx Removed/yr N/A N/A 1,738 Total First Year Cost N/A $2,881,498$14,376,575 Incremental First Year Cost N/A N/A$11,495,077 $/T of NOx N/A $3,312 $5,512 Incremental $/T of NOx N/A N/A $6,614

*Assume LNB/SOFA is baseline **Following LNB/SOFA, and excluding LNB/SOFA NOx reductions and costs

090000648116a0e9.xlsx 11/16/2012

### (lb/hr) (tpy) Ave Incremental (from previous)

OFA LNB+OFA (baseline) 0.220 646 2,576

............................................................ SNCR+LNB+OFA 0.170 500 1,991 585 1,957,053 3,345

............... SCR+LNB+OFA 0.070 206 820 1,756 10,595,634 6,034 7,377

OFA LNB+OFA (baseline) 0.220 644 2,427

............................................................ SNCR+LNB+OFA 0.170 498 1,876 551 1,880,382 3,413

............... SCR+LNB+OFA 0.070 205 772 1,655 10,473,778 6,329 7,784

OFA LNB+OFA (baseline) 0.220 939 3,825

............................................................ SNCR+LNB+OFA 0.170 725 2,955 870 2,881,498 3,312

............... SCR+LNB+OFA 0.070 299 1,217 2,608 14,376,575 5,512 6,614 NA; LNB+OFA is the currently installed technology 

# Table 19 - Cholla Units 2, 3, and 4: EPA's Control Cost Summary (APS)

Control Option Emission Factor (lb/MMBtu) Emission Rate Emissions removed (tpy) Annual cost

($/yr) Cost-effectiveness ($/ton)



## Cholla 2 NA; LNB+OFA is the currently installed technology



## Cholla 3 NA; LNB+OFA is the currently installed technology



## Cholla 4

090000648116a0e9.xlsx 11/16/2012

### Unit 2 CH2M HILL Base LNB/SOFA SNCR* SCR* NOx Emissions Rate 0.2950 0.2950 0.2100 0.0500 Capacity Factor 74% 74% 74% 74% MMBTU/yr 19,589,813 19,589,813 19,589,813 19,589,813 Tons NOx Emitted 2,890 2,890 2,023 490 Tons NOx Removed/yr N/A 0 867 2,400 Total First Year Cost** N/A N/A $2,482,318 $7,475,028 $/T of NOx N/A N/A $2,863 $3,115

Unit 3 CH2M HILL Base LNB/SOFA SNCR* SCR*

NOx Emissions Rate 0.2540 0.2540 0.1800 0.0500 Capacity Factor 75% 75% 75% 75% MMBTU/yr 22,863,600 22,863,600 22,863,600 22,863,600 Tons NOx Emitted 2,908 2,908 2,036 572 Tons NOx Removed/yr N/A 0 872 2,336 Total First Year Cost** N/A N/A $2,530,511 $8,113,131 $/T of NOx N/A N/A $2,902 $3,473

Unit 4 CH2M HILL Base LNB/SOFA SNCR* SCR*

NOx Emissions Rate 0.2600 0.2600 0.1800 0.0500 Capacity Factor 72% 72% 72% 72% MMBTU/yr 27,745,373 27,745,373 27,745,373 27,745,373 Tons NOx Emitted 3,609 3,609 2,526 694 Tons NOx Removed/yr N/A 0 1,083 2,915 Total First Year Cost** N/A N/A $3,185,049 $9,894,796 $/T of NOx N/A N/A $2,941 $3,394

*Following LNB/SOFA, and excluding LNB/SOFA NOx reductions and costs **9.51% CRF 

# Cholla EPA NOx BART Emissions/Costs

090000648116a0e9.xlsx 11/16/2012

### Unit 2 LNB/SOFA* SNCR** SCR** NOx Emissions Rate 0.2950 0.2100 0.0500 Capacity Factor 74% 74% 74% MMBTU/yr 19,589,813 19,589,813 19,589,813 Tons NOx Emitted 2,890 2,023 490 Tons NOx Removed/yr N/A 867 2,400 Incremental Tons NOx Removed/yr N/A N/A 1,533 Total First Year Cost N/A $2,482,318 $7,475,028 Incremental First Year Cost N/A N/A $4,992,710 $/T of NOx N/A $2,863 $3,115 Incremental $/T of NOx N/A N/A $3,257

Unit 3 LNB/SOFA* SNCR** SCR**

NOx Emissions Rate 0.2540 0.1800 0.0500 Capacity Factor 75% 75% 75% MMBTU/yr 22,863,600 22,863,600 22,863,600 Tons NOx Emitted 2,908 2,036 572 Tons NOx Removed/yr N/A 872 2,336 Incremental Tons NOx Removed/yr N/A N/A 1,464 Total First Year Cost N/A $2,530,511 $8,113,131 Incremental First Year Cost N/A N/A $5,582,620 $/T of NOx N/A $2,902 $3,473 Incremental $/T of NOx N/A N/A $3,813



# Table 19 Cholla (EPA)

Unit 4 LNB/SOFA* SNCR** SCR**

NOx Emissions Rate 0.2600 0.1800 0.0500 Capacity Factor 72% 72% 72% MMBTU/yr 27,745,373 27,745,373 27,745,373 Tons NOx Emitted 3,609 2,526 694 Tons NOx Removed/yr N/A 1,083 2,915 Incremental Tons NOx Removed/yr N/A N/A 1,832 Total First Year Cost N/A $3,185,049 $9,894,796 Incremental First Year Cost N/A N/A $6,709,747 $/T of NOx N/A $2,941 $3,394 Incremental $/T of NOx N/A N/A $3,663

*Assume LNB/SOFA is baseline **Following LNB/SOFA, and excluding LNB/SOFA NOx reductions and costs

090000648116a0e9.xlsx 11/16/2012

### (lb/hr) (tpy) Ave Incremental (from previous)

OFA LNB+OFA (baseline) 0.295 892 2,890

............................................................ SNCR+LNB+OFA 0.210 624 2,023 867 2,482,318 2,863

............... SCR+LNB+OFA 0.050 151 490 2,400 7,475,028 3,115 3,257

OFA LNB+OFA (baseline) 0.254 885 2,908

............................................................ SNCR+LNB+OFA 0.180 620 2,036 872 2,530,511 2,902

............... SCR+LNB+OFA 0.050 174 572 2,336 8,113,131 3,473 3,813

OFA LNB+OFA (baseline) 0.260 1,144 3,609

............................................................ SNCR+LNB+OFA 0.180 801 2,526 1,083 3,185,049 2,941

............... SCR+LNB+OFA 0.050 220 694 2,915 9,894,796 3,394 3,663 NA; LNB+OFA is the currently installed technology 

# Table 19 - Cholla Units 2, 3, and 4: EPA's Control Cost Summary (EPA)

Control Option Emission Factor (lb/MMBtu) Emission Rate Emissions removed (tpy) Annual cost

($/yr) Cost-effectiveness ($/ton)



## Cholla 2 NA; LNB+OFA is the currently installed technology



## Cholla 3 NA; LNB+OFA is the currently installed technology



## Cholla 4

090000648116a0e9.xlsx 11/16/2012