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-17 113,750 125,141 2,332 5,079 30,624 54,932 32,174 125,141

AFUDC 95 405 1,893 5,533 2,383 10,309

Total 2,427 5,484 32,517 60,465 34,558 135,450

C2 SCR Fall 2017 15-Dec-2017 Mar-18 83,231 93,276 1,749 6,610 28,710 44,141 12,065 93,276

AFUDC 71 418 1,891 5,014 1,928 9,322

Total 1,820 7,028 30,601 49,155 13,994 102,598

C3 SCR Spring 2018 30-Mar-2018 Jun-18 83,231 93,899 459 35 3,600 4,508 22,968 38,199 24,131 93,899

AFUDC 19 40 192 538 1,701 4,332 1,806 8,629

Total 478 75 3,792 5,046 24,669 42,531 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 $3,326,000 100.0% ($3,326,000)

Deduct for LNB $2,890,000 100.0% ($2,890,000)

Total Capital for 3+1 SCR $93,097,000

Reactor Housing & Installation $539,600 25.0% ($134,900)

Catalyst $2,968,750 33.3% ($988,594)

Initial Urea $277,000 33.3% ($92,241)

Foundations & Supports $6,924,800 25.0% ($1,731,200)

Handling & Erection $5,650,400 25.0% ($1,412,600)

Piling $500,000 25.0% ($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 Analysis - Cost Analysis 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 1.16 Levelization 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

APS Cholla Analysis - Cost Analysis 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 $/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 1.16 Levelization 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

APS Cholla Analysis - Cost Analysis 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 $/kW x 84 kW continuous (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 1.16 Levelization 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 $1,139,000
C2 Loads (surcharge) CC Loads

Unit 2 LNB/SOFA SNCR* SCR* LNB/SOFA SNCR NH3 Plant SNCR* 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 WA 30-9484 Mar-08 1.10381289 escalation 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 Plant SNCR* 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 WA CHC0042 May-09 1.07689063 escalation 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 Plant SNCR* 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 WA CHC0048 May-08 1.10381289 escalation 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$)

CH2M HILL APS (2012$)

CH2M HILL APS (2012$)

090000648116a0e9.xlsx 11/16/2012
Unit 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 LNB/SOFA, and excluding LNB/SOFA costs

CH2M HILL APS EPA

Cholla CH2M HILL vs. EPA NOx BART O&M

CH2M HILL APS EPA

CH2M HILL 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