(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
(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 3,399,547 5,811 ...............

SCR+LNB+OFA 0.070 206 820 1,756 14,264,322 8,123 9,278

OFA

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

SNCR+LNB+OFA 0.170 498 1,876 551 3,316,669 6,019 ...............

SCR+LNB+OFA 0.070 205 772 1,655 14,115,493 8,529 9,782

OFA

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

SNCR+LNB+OFA 0.170 725 2,955 870 4,907,315 5,641 ...............

SCR+LNB+OFA 0.070 299 1,217 2,608 19,295,888 7,399 8,279

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
(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
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
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 $3,399,547 $14,264,322

Incremental First Year Cost N/A N/A $10,864,775

$/T of NOx N/A $5,811 $8,123

Incremental $/T of NOx N/A N/A $9,278

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 $3,316,669 $14,115,493

Incremental First Year Cost N/A N/A $10,798,825

$/T of NOx N/A $6,019 $8,529

Incremental $/T of NOx N/A N/A $9,782

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 $4,907,315 $19,295,888

Incremental First Year Cost N/A N/A $14,388,573

$/T of NOx N/A $5,641 $7,399

Incremental $/T of NOx N/A N/A $8,279

*Assume LNB/SOFA is baseline

**Following LNB/SOFA, and excluding LNB/SOFA NOx reductions and 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
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 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 $799,207 $3,399,547 $14,264,322

$/T of NOx N/A $241 $5,811 $8,123

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 $752,482 $3,316,669 $14,115,493

$/T of NOx N/A $359 $6,019 $8,529

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 $898,165 $4,907,315 $19,295,888

$/T of NOx N/A $265 $5,641 $7,399

*Following LNB/SOFA, and excluding LNB/SOFA NOx reductions and costs

Cholla APS NOx BART Emissions/Costs

**13.40% FCR (APS official rate)

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* LNB/SOFA SNCR* SCR* LNB/SOFA SNCR* SCR*

Materials Design Supply $2,100,000 $4,500,000 $30,000,000 $1,906,285 $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 $8,110,283 $18,093,725 $0 $0 $0

Balance of Plant 50% $1,050,000 $2,250,000 $15,000,000 incl incl $18,093,725 $0 $0 $0

Electrical 5% $105,000 $225,000 $1,500,000 incl incl $1,809,372 $0 $0 $0

Owner's Costs 10% $210,000 $450,000 $3,000,000 $620,343 $1,209,806 $3,618,745 $0 $0 $0

Surcharge 16% $336,000 $720,000 $4,800,000 $156,741 $1,520,818 $1,757,624 $0 $0 $0

AFUDC 12% $252,000 $540,000 $3,600,000 incl $1,399,780 $9,322,098 $0 $0 $0

Subtotal $5,103,000 $10,935,000 $72,900,000 $5,068,709 $14,818,098 $88,882,738 $0 $5,778,000 $53,940,000

Contingency 15% $315,000 $675,000 $4,500,000 $0 $1,189,718 $5,428,000 $0 $0 $0

TOTAL $5,418,000 $11,610,000 $77,400,000 $5,068,709 $16,007,816 $94,310,738 $0 $5,778,000 $53,940,000

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

Materials Design Supply $2,100,000 $4,500,000 $30,000,000 $1,686,411 $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 $7,958,083 $18,093,725 $0 $0 $0

Balance of Plant 50% $1,050,000 $2,250,000 $15,000,000 incl incl $18,093,725 $0 $0 $0

Electrical 5% $105,000 $225,000 $1,500,000 incl incl $1,809,372 $0 $0 $0

Owner's Costs 10% $210,000 $450,000 $3,000,000 $469,524 $1,222,006 $3,618,745 $0 $0 $0

Surcharge 16% $336,000 $720,000 $4,800,000 $401,680 $1,518,367 $1,757,624 $0 $0 $0

AFUDC 12% $252,000 $540,000 $3,600,000 incl $875,732 $8,628,728 $0 $0 $0

Subtotal $5,103,000 $10,935,000 $72,900,000 $4,720,012 $14,207,599 $88,189,368 $0 $6,246,000 $60,564,000

Contingency 15% $315,000 $675,000 $4,500,000 $0 $1,181,718 $5,428,000 $0 $0 $0

TOTAL $5,418,000 $11,610,000 $77,400,000 $4,720,012 $15,389,318 $93,617,368 $0 $6,246,000 $60,564,000

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

Materials Design Supply $2,650,000 $5,700,000 $41,000,000 $2,178,927 $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 $12,452,633 $24,728,090 $0 $0 $0

Balance of Plant 50% $1,325,000 $2,850,000 $20,500,000 incl incl $24,728,090 $0 $0 $0

Electrical 5% $133,000 $285,000 $2,050,000 incl incl $2,472,809 $0 $0 $0

Owner's Costs 10% $265,000 $570,000 $4,100,000 $321,210 $1,769,815 $4,945,618 $0 $0 $0

Surcharge 16% $424,000 $912,000 $6,560,000 $65,125 $1,897,074 $2,402,087 $0 $0 $0

AFUDC 12% $318,000 $684,000 $4,920,000 incl $1,684,083 $10,309,193 $0 $0 $0

Subtotal $6,440,000 $13,851,000 $99,630,000 $5,434,071 $21,830,451 $119,042,067 $0 $8,280,000 $73,859,000

Contingency 15% $398,000 $855,000 $6,150,000 $0 $1,825,692 $7,418,427 $0 $0 $0

TOTAL $6,838,000 $14,706,000 $105,780,000 $5,434,071 $23,656,143 $126,460,494 $0 $8,280,000 $73,859,000

*Following LNB/SOFA, and excluding LNB/SOFA costs

EPA

EPA

EPA

Cholla CH2M HILL vs. APS vs. EPA NOx BART Capital

CH2M HILL APS

CH2M HILL APS

CH2M HILL APS

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 $63,000 $45,000 $0 $1,936,916 $2,383,481

Maintenance Material $60,000 $60,000 $90,000 $60,000 $110,000 $90,000 $0 $0 $0

Maintenance Labor $30,000 $30,000 $45,000 $30,000 incl $45,000 $0 $0 $0

Administrative Labor $0 $0 $0 $0 $0 $0 $0 $0 $0

Makeup Water $0 $0 $0 $0 $2,000 $0 $0 $0 $0

Reagent $0 $195,139 $398,813 $0 $1,061,000 $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 $18,500 $597,870 $0 $0 $0

TOTAL $120,000 $434,713 $1,626,683 $120,000 $1,254,500 $1,626,683 $0 $1,936,916 $2,383,481

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

Operating Labor $30,000 $30,000 $45,000 $30,000 $63,000 $45,000 $0 $1,940,933 $2,396,330

Maintenance Material $60,000 $60,000 $90,000 $60,000 $110,000 $90,000 $0 $0 $0

Maintenance Labor $30,000 $30,000 $45,000 $30,000 incl $45,000 $0 $0 $0

Administrative Labor $0 $0 $0 $0 $0 $0 $0 $0 $0

Makeup Water $0 $0 $0 $0 $2,000 $0 $0 $0 $0

Reagent $0 $183,852 $375,746 $0 $1,061,000 $375,746 $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 $113,004 $565,020 $0 $18,500 $565,020 $0 $0 $0

TOTAL $120,000 $416,856 $1,570,766 $120,000 $1,254,500 $1,570,766 $0 $1,940,933 $2,396,330

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

Operating Labor $42,500 $42,500 $63,750 $42,500 $71,245 $63,750 $0 $2,403,476 $2,923,047

Maintenance Material $85,000 $85,000 $127,500 $85,000 $124,396 $127,500 $0 $0 $0

Maintenance Labor $42,500 $42,500 $63,750 $42,500 incl $63,750 $0 $0 $0

Administrative Labor $0 $0 $0 $0 $0 $0 $0 $0 $0

Makeup Water $0 $0 $0 $0 $2,262 $0 $0 $0 $0

Reagent $0 $289,706 $592,084 $0 $1,518,569 $592,084 $0 $0 $0

Catalyst $0 $0 $637,500 $0 $0 $637,500 $0 $0 $0

Waste Disposal $0 $0 $0 $0 $0 $0 $0 $0 $0

Electric Power $0 $173,120 $865,598 $0 $20,921 $865,598 $0 $0 $0

TOTAL $170,000 $632,826 $2,350,182 $170,000 $1,737,392 $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. APS vs. EPA NOx BART O&M

CH2M HILL APS EPA

CH2M HILL APS EPA

090000648116a0e9.xlsx 11/16/2012
2 3 Com (2&3) 2+Com 3+Com 4* Com (4)* 4+Com*

Operating labor $38,000 $38,000 $50,000 $63,000 $63,000 $42,973 $28,272 $71,245

Maintenance labor and materials $66,000 $66,000 $88,000 $110,000 $110,000 $74,637 $49,758 $124,396

Reagent $1,061,000 $1,061,000 $0 $1,061,000 $1,061,000 $1,518,569 $0 $1,518,569

Fly Ash diposal $0 $0 $0 $0 $0 $0 $0 $0

Auxiliary Power $2,000 $2,000 $33,000 $18,500 $18,500 $2,262 $18,659 $20,921

Water $0 $0 $4,000 $2,000 $2,000 $0 $2,262 $2,262

$1,167,000 $1,167,000 $175,000 $1,254,500 $1,254,500 $1,638,441 $98,951 $1,737,392

*Unit 4 costs ratioed from Units 2&3 costs in B&V study

-Labor, maintenance, power, and water from share %

-Reagent and fly ash disposal from MW's

Cholla SNCR O&M Calculations (calculated from B&V SNCR Study)

090000648116a0e9.xlsx 11/16/2012