Cost Basis

Capital Cost

Total Installed Cost $ 2,904,000 Fuel Tech budgetary Total Installed Cost for equipment (a). 

Annual Capacity Factor, % 30% Ravenswood anticipates to operate at a 30% capacity factor in the near futureBoiler Capacity, MMBtu/hr 4,204 MMBtu/hr heat input rating provided by TransCanada Ravenswood Generating StationNOx Emissions before Control, lb/MMBtu 0.24 Maximum actual emissions pre-LNB/SOFANOx Emissions after Control, lb/MMBtu 0.17 Maximum actual emissions post-LNB/SOFANOx Emissions before Control, tons/year 1,325.8 Calculated from the pre-control lb/MMBtu, MMBtu/hr rating of the unit and the ann

capacity factor

NOx Emissions after Control, tons/year 939.1 Calculated from the post-control lb/MMBtu, MMBtu/hr rating of the unit and the an

capacity factor

NOx Emission Reduction, ton/yr 386.7

Annual Costs, $/yr

Operating Labor $ 4,928 0.5 hr/shift at $30/hr (b)Supervisor $ 739 15% of operating labor (b)Maintenance Labor $ 4,928 0.5 hr/shift at $30/hr (b)Maintenance Materials $ 4,928 100% of maintenance labor (b)Overhead $ 9,313 60% of oper, maint. & supv labor + maint. material costs (b)Taxes, Insurance, and Administration $ 116,160 4% of total installed cost (b)Capital Recovery $ 413,464 7.0%, 10 years, 0.1424 TCI (b)Total Annual Cost $ 554,459 Cost Effectiveness, $ per ton $1,434 / ton Total annual cost divided by tons of NOx removed

Table A-1

LNB/SOFA Cost Effectiveness for NOx for Ravenswood No. 10 Boiler @ 30 % Capacity Factor

(b) EPA Air Pollution Control Cost Manual, Sixth Edition, Section 4, Page 2-44. EPA/452/B-002-001. January 2002.(a) Total Installed Cost estimate for the advanced combustion control system provided by Fuel Tech. Urea solution cost (as delivered) provided by Mosaic 

Company, Bob Ness (800-918-8270), May 3, 2010.

Ravenswood Generating Station BART ReportAppendix A Page A-1
Cost Basis

Capital Cost

Total Installed Cost $ 2,904,000 Fuel Tech budgetary Total Installed Cost for equipment (a). 

Annual Capacity Factor, % 30% Ravenswood anticipates to operate at a 30% capacity factor in the near futureBoiler Capacity, MMBtu/hr 4,171 MMBtu/hr heat input rating provided by TransCanada Ravenswood Generating StationNOx Emissions before Control, lb/MMBtu 0.24 Maximum emissions before controlNOx Emissions after Control, lb/MMBtu 0.17 Maximum emissions after controlNOx Emissions before Control, tons/year 1,315.4 Calculated from the pre-control lb/MMBtu, MMBtu/hr rating of the unit and the ann

capacity factor

NOx Emissions after Control, tons/year 939.1 Calculated from the post-control lb/MMBtu, MMBtu/hr rating of the unit and the an

capacity factor

NOx Emission Reduction, ton/yr 376.3

Annual Costs, $/yr

Operating Labor $ 4,928 0.5 hr/shift at $30/hr (b)Supervisor $ 739 15% of operating labor (b)Maintenance Labor $ 4,928 0.5 hr/shift at $30/hr (b)Maintenance Materials $ 4,928 100% of maintenance labor (b)Overhead $ 9,313 60% of oper, maint. & supv labor + maint. material costs (b)Taxes, Insurance, and Administration $ 116,160.00 4% of total installed cost (b)Capital Recovery $ 413,464 7.0%, 10 years, 0.1424 TCI (b)Total Annual Cost $ 554,459 Cost Effectiveness, $ per ton $1,474 / ton Total annual cost divided by tons of NOx removed

Table A-2

LNB/SOFA Cost Effectiveness for NOx for Ravenswood No. 20 Boiler @ 30 % Capacity Factor

(b) EPA Air Pollution Control Cost Manual, Sixth Edition, Section 4, Page 2-44. EPA/452/B-002-001. January 2002.(a) Total Installed Cost estimate for the advanced combustion control system provided by Fuel Tech. Urea solution cost (as delivered) provided by Mosaic 

Company, Bob Ness (800-918-8270), May 3, 2010.

Ravenswood Generating Station BART ReportAppendix A Page A-2
Cost Basis

Capital Cost

Total Installed Cost $ 8,000,000 Fuel Tech budgetary Total Installed Cost for equipment (a). Unit 3 consists of 2 modules A and B each requiring its own combustion control system. 

Annual Capacity Factor, % 30% Ravenswood anticipates to operate at a 30% capacity factor in the near futureBoiler Capacity, MMBtu/hr 9,379 MMBtu/hr heat input rating provided by TransCanada Ravenswood Generating StationNOx Emissions before Control, lb/MMBtu 0.24 Maximum actual emissions pre-LNB/SOFANOx Emissions after Control, lb/MMBtu 0.17 Maximum actual emissions post-LNB/SOFANOx Emissions before Control, tons/year 2,957.8 Calculated from the pre-control lb/MMBtu, MMBtu/hr rating of the unit and t

annual capacity factor

NOx Emissions after Control, tons/year 2,095.1 Calculated from the post-control lb/MMBtu, MMBtu/hr rating of the unit and the annual capacity factorNOx Emission Reduction, ton/yr 862.7

Annual Costs, $/yr

Operating Labor $ 9,855 0.5 hr/shift at $30/hr (b)Supervisor $ 2,957 15% of operating labor (b)Maintenance Labor $ 9,855 0.5 hr/shift at $30/hr (b)Maintenance Materials $ 9,855 100% of maintenance labor (b)Overhead $ 19,513 60% of oper, maint. & supv labor + maint. material costs (b)Taxes, Insurance, and Administration $ 320,000 4% of total installed cost (b)Capital Recovery $ 1,139,020 7.0%, 10 years, 0.1424 TCI (b)Total Annual Cost $ 1,511,054 Cost Effectiveness, $ per ton $1,752 / ton Total annual cost divided by tons of NOx removed

Table A-3

LNB/SOFA Cost Effectiveness for NOx for Ravenswood No. 30 Boilers @ 30 % Capacity Factor

(b) EPA Air Pollution Control Cost Manual, Sixth Edition, Section 4, Page 2-44. EPA/452/B-002-001. January 2002.(a) Total Installed Cost estimate for the advanced combustion control system provided by Fuel Tech. Urea solution cost (as delivered) provided by Mosaic 

Company, Bob Ness (800-918-8270), May 3, 2010.

Ravenswood Generating Station BART ReportAppendix A Page A-3
Cost Basis

Capital Cost

Total Installed Cost $ 2,359,500 Fuel Tech budgetary Total Installed Cost for equipment (a). 

Annual Capacity Factor, % 30% Ravenswood anticipates to operate at a 30% capacity factor in the near futureBoiler Capacity, MMBtu/hr 4,204 Rated MMBtu/hr heat input provided by TransCanada Ravenswood Generating SNOx Emissions before Control, lb/MMBtu 0.170 Maximum actual emissions pre-SNCRNOx Emissions after Control, lb/MMBtu 0.150 Maximum actual emissions post-SNCRNOx Emissions before Control, tons/year 939.1 Calculated from the pre-control lb/MMBtu, MMBtu/hr rating of the unit and the anNOx Emissions after Control, tons/year 828.6 Calculated from the post-control lb/MMBtu, MMBtu/hr rating of the unit and the aNOx Emission Reduction, ton/yr 110.5

Annual Costs, $/yr

Urea solution $ 251,789 Estimate from Fuel Tech, 67 gal/hr. $1.43/gal delivered cost based on quotation Water $ 2,838 Engineering judgment, 45 gal/min. $0.4/1,000 gal. (Range of 30 - 60 gpm given Operating Labor $ 4,928 0.5 hr/shift at $30/hr (b)Supervisor $ 739 15% of operating labor (b)Maintenance Labor $ 4,928 0.5 hr/shift at $30/hr (b)Maintenance Materials $ 4,928 100% of maintenance labor (b)Air Heater Washes (est. 3-6/year per unit) $ 240,000 Conservatively 3 washes/year @ $80,000/washAmmonia CEMS Labor $ 10,000 AECOM experienceElectricity $ 17,345 Engineering judgment, 110 kW/hr @ $0.06/kWh. (range of 100 - 120 kW estimaOverhead $ 159,313 60% of oper, maint. & supv labor + maint. material costs (b)Taxes, Insurance, and Administration $ 94,380 4% of total installed cost (b)Capital Recovery $ 335,940 7.0%, 10 years, 0.1424 TCI (b)Total Annual Cost $ 1,127,126 Cost Effectiveness, $ per ton $10,202 / ton Total annual cost divided by tons of NOx removed

Table A-4

SNCR Cost Effectiveness for NOx for Ravenswood No. 10 Boiler @ 30 % Capacity Fact

(b) EPA Air Pollution Control Cost Manual, Sixth Edition, Section 4, Page 2-44. EPA/452/B-002-001. January 2002.(a) Total Installed Cost estimate for SNCR provided by Fuel Tech. Urea solution cost (as delivered) provided by Mosaic Company, Bob Ness (800-918-8270)

Ravenswood Generating Station BART ReportAppendix A Page A-4
Cost Basis

Capital Cost

Total Installed Cost $ 2,359,500 Fuel Tech budgetary Total Installed Cost for equipment (a). 

Annual Capacity Factor, % 30% Ravenswood anticipates to operate at a 30% capacity factor in the near futureBoiler Capacity, MMBtu/hr 4,171 Rated MMBtu/hr heat input provided by TransCanada Ravenswood Generating SNOx Emissions before Control, lb/MMBtu 0.170 Maximum emissions pre-SNCRNOx Emissions after Control, lb/MMBtu 0.150 Maximum emissions post-SNCRNOx Emissions before Control, tons/year 931.7 Calculated from the pre-control lb/MMBtu, MMBtu/hr rating of the unit and the anNOx Emissions after Control, tons/year 822.1 Calculated from the post-control lb/MMBtu, MMBtu/hr rating of the unit and the aNOx Emission Reduction, ton/yr 109.6

Annual Costs, $/yr

Urea solution $ 251,789 Estimate from Fuel Tech, 67 gal/hr. $1.43/gal delivered cost based on quotation Water $ 2,838 Engineering judgment, 45 gal/min. $0.4/1,000 gal. (Range of 30 - 60 gpm given Operating Labor $ 4,928 0.5 hr/shift at $30/hr (b)Supervisor $ 739 15% of operating labor (b)Maintenance Labor $ 4,928 0.5 hr/shift at $30/hr (b)Maintenance Materials $ 4,928 100% of maintenance labor (b)Air Heater Washes (est. 3-6/year per unit) $ 240,000 Conservatively 3 washes/year @ $80,000/washAmmonia CEMS Labor $ 10,000 AECOM experienceElectricity $ 17,345 Engineering judgment, 110 kW/hr @ $0.06/kWh. (range of 100 - 120 kW estimaOverhead $ 159,313 60% of oper, maint. & supv labor + maint. material costs (b)Taxes, Insurance, and Administration $ 94,380 4% of total installed cost (b)Capital Recovery $ 335,940 7.0%, 10 years, 0.1424 TCI (b)Total Annual Cost $ 1,127,126 Cost Effectiveness, $ per ton $10,283 / ton Total annual cost divided by tons of NOx removed

Table A-5

SNCR Cost Effectiveness for NOx for Ravenswood No. 20 Boiler @ 30 % Capacity Fact

(b) EPA Air Pollution Control Cost Manual, Sixth Edition, Section 4, Page 2-44. EPA/452/B-002-001. January 2002.(a) Total Installed Cost estimate for SNCR provided by Fuel Tech. Urea solution cost (as delivered) provided by Mosaic Company, Bob Ness (800-918-8270)

Ravenswood Generating Station BART ReportAppendix A Page A-5
Cost Basis

Capital Cost

Total Installed Cost $ 6,000,000 Fuel Tech budgetary Total Installed Cost for equipment (a). Unit 3 consists of 2 modules A and B each requiring its own SNCR. 

Annual Capacity Factor, % 30% Ravenswood anticipates to operate at a 30% capacity factor in the near futureBoiler Capacity, MMBtu/hr 9,379 Rated MMBtu/hr heat input provided by TransCanada Ravenswood Generating StationNOx Emissions before Control, lb/MMBtu 0.170 Maximum emissions pre-SNCRNOx Emissions after Control, lb/MMBtu 0.150 Maximum emissions post-SNCRNOx Emissions before Control, tons/year 2,095.1 Calculated from the pre-control lb/MMBtu, MMBtu/hr rating of the unit and t

annual capacity factor

NOx Emissions after Control, tons/year 1,848.6 Calculated from the post-control lb/MMBtu, MMBtu/hr rating of the unit and the annual capacity factorNOx Emission Reduction, ton/yr 246.5

Annual Costs, $/yr

Urea solution $ 664,421 Estimate from Fuel Tech, 88.4gal/hr/SNCR. $1.43/gal delivered cost based on quotation from Mosaic Co. (a)Water $ 5,676 Engineering judgment, 45 gal/min. $0.4/1,000 gal. (Range of 30 - 60 gpm given by Fuel tech)Operating Labor $ 9,855 0.5 hr/shift at $30/hr (b)Supervisor $ 2,957 15% of operating labor (b)Maintenance Labor $ 9,855 0.5 hr/shift at $30/hr (b)Maintenance Materials $ 9,855 100% of maintenance labor (b)Air Heater Washes (est. 3-6/year per unit) $ 600,000 Conservatively 3 washes/year /SNCR@ $100,000/wash/SNCRAmmonia CEMS Labor $ 20,000 AECOM experienceElectricity $ 34,690 Engineering judgment, 110 kW/hr/SNCR @ $0.06/kWh. (range of 100 - 12

kW estimated by Fuel Tech)

Overhead $ 391,513 60% of oper, maint. & supv labor + maint. material costs (b)Taxes, Insurance, and Administration $ 240,000 4% of total installed cost (b)Capital Recovery $ 854,265 7.0%, 10 years, 0.1424 TCI (b)Total Annual Cost $ 2,843,087 Cost Effectiveness, $ per ton $11,535 / ton Total annual cost divided by tons of NOx removed

Table A-6

SNCR Cost Effectiveness for NOx for Ravenswood No. 30 Boilers @ 30 % Capacity Factor

(b) EPA Air Pollution Control Cost Manual, Sixth Edition, Section 4, Page 2-44. EPA/452/B-002-001. January 2002.(a) Total Installed Cost estimate for SNCR provided by Fuel Tech. Urea solution cost (as delivered) provided by Mosaic Company, Bob Ness (800-918-8270)May 3, 2010.

Ravenswood Generating Station BART ReportAppendix A Page A-6
Boiler 10 Boiler 20 Notes

Capital Cost

Total Installed Cost $ 100,000,000 $ 100,000,000 Costs provided by TransCanada Boiler Capacity, MMBtu/hr 4,204 4,171

MMBtu/hr heat input rating provided by TransCanada Ravenswood Generating 

Station

NOx Emissions before Control, lb/MMBtu 0.17 0.17 Emission rate post the advanced combustion controlsAnnual Capacity Factor, % 30% 30% Ravenswood anticipates to operate at a 30% capacity factor in the near futureNOx Emissions before Control, ton/yr 939.1 931.7NOx Emissions after Control, lb/MMBtu 0.03 0.03Control Efficiency, % 85% 85%NOx Emissions after Control, ton/yr 138.1 137.0NOx Emission Reduction, ton/yr 801.0 794.7

Annual Costs, $/yr

Catalyst Annual Cost

Catalyst Replacement Cost $ 10,000,000 $ 10,000,000 10% of SCR's total installaed cost

Catalyst Life 5.0 5.0 years

Annual Costs, $/yr $ 2,438,907 $ 2,438,907 7% interest (a)

19% aqueous ammonia $ 187,431 $ 185,960 

 0.39 ton NH3 per ton NOx removed at a delivered cost of $600/ton NH3 based on 19% aqueous ammonia (engineering 

estimate). 

Operating Labor $ 25,550 $ 25,550 2.0 hr/day at $35/hrSupervisor $ 3,833 $ 3,833 15% of operating laborMaintenance Labor $ 25,550 $ 25,550 2.0 hr/day at $35/hrMaintenance Materials $ 25,550 $ 25,550 100% of maintenance laborAmmonia CEMS labor $ 20,000 $ 20,000 AECOM experienceElectricity $ 105,120 $ 105,120 Engineering estimate. 500 kW for Boiler No. 10 and Boiler No. 20. $0.08/kWhOverhead $ 60,290 $ 60,290 60% of oper, maint. & supv labor + maint. material costs (a)Taxes, Insurance, and Administration $ 4,000,000 $ 4,000,000 4% of total installed cost (a)Capital Recovery $ 12,813,975 $ 12,813,975 7.0%, 10 years, 0.1424 x (TCI-catalyst) (a)Total Annual Cost $ 19,706,205 $ 19,704,734 Total Cost Effectiveness, $/ton $ 24,602 $ 24,795 (a) EPA Air Pollution Control Cost Manual, Sixth Edition, Section 4, Page 2-44. EPA/452/B-002-001. January 2002.

Table A-7

SCR Cost Effectiveness for NOx for Ravenswood No. 10 and 20 Boilers @ 30 % Capacity Factor

Ravenswood Generating Station BART ReportAppendix A Page A-7
Boiler 30 Notes

Capital Cost

Total Installed Cost $ 245,000,000 Costs provided by TransCanada Boiler Capacity, MMBtu/hr 9,379 Combined capacity of the N and S boilersNOx Emissions before Control, lb/MMBtu 0.17 Emission rate post the advanced combustion controls

Annual Capacity Factor, % 30% Ravenswood anticipates to operate at a 30% capacity factor in the near futureNOx Emissions before Control, ton/yr 2,095.1NOx Emissions after Control, lb/MMBtu 0.025 engineering judgementControl Efficiency, % 85%NOx Emissions after Control, ton/yr 308.1NOx Emission Reduction, ton/yr 1,787.0

Annual Costs, $/yr

Catalyst Annual Cost

Catalyst Replacement Cost $ 24,500,000 10% of SCR's total installaed cost

Catalyst Life 5.0 years

Annual Costs, $/yr $ 5,975,322 7% interest (a)

19% aqueous ammonia $ 418,154 

0.39 ton NH3 per ton NOx removed at a delivered cost of $600/ton NH3 based on 19% aqueous ammonia (engineering 

estimate).

Operating Labor $ 25,550 2.0 hr/day at $35/hrSupervisor $ 3,833 15% of operating laborMaintenance Labor $ 25,550 2.0 hr/day at $35/hrMaintenance Materials $ 25,550 100% of maintenance laborAmmonia CEMS labor $ 20,000 AECOM experienceElectricity $ 210,240 Engineering estimate. 1000 kW for Boiler No, 30. $0.08/kWhOverhead $ 60,290 60% of oper, maint. & supv labor + maint. material costs (a)Taxes, Insurance, and Administration $ 9,800,000 4% of total installed cost (a)Capital Recovery $ 31,394,239 7.0%, 10 years, 0.1424 x (TCI-catalyst) (a)Total Annual Cost $ 47,958,727 Total Cost Effectiveness, $/ton $ 26,838

Table A-8

SCR Cost Effectiveness for NOx for Ravenswood No. 30 Boilers @ 30 % Capacity 

Factor

(a) EPA Air Pollution Control Cost Manual, Sixth Edition, Section 4, Page 2-44. EPA/452/B-002-001. January 2002.

Ravenswood Generating Station BART ReportAppendix A Page A-8
Cost Basis

Annual Capacity Factor, % 30% Ravenswood anticipates to operate at a 30% capacity factor in the near futureCombined Capacity of the three boilers, MMBtu/hr 17,754 Combined rated MMBtu/hr heat input for the three boilers provided by TransC

Generating Station

NOx Emissions (residual oil combustion), lb/MMBtu 0.24 Maximum actual emissionsNOx Emissions (distillate oil combustion), lb/MMBtu 0.10 Engineering judgement based on the use of low NOx burnersNOx Emissions (residual oil combustion), tons/year 5,598.9 Calculated from the residual oil combustion lb/MMBtu, MMBtu/hr rating of the 

capacity factor

NOx Emissions (distillate oil combustion), tons/year 2,332.9 Calculated from the distillate oil combustion lb/MMBtu, MMBtu/hr rating of the 

capacity factor

NOx Emission Reduction, ton/yr 3,266.0PM10 Emissions (residual oil combustion), lb/MMBtu 0.040 PM10 emission factor for residual oil combustion based on AP-42 Table 1.3-1PM10 Emissions (distillate oil combustion), lb/MMBtu 0.014 PM10 emission factor for distillate oil combustion based on AP-42 Table 1.3-1PM10 Emissions (residual oil combustion), tons/year 929.6 Calculated from the residual oil combustion lb/MMBtu, MMBtu/hr rating of the 

capacity factor

PM10 Emissions (distillate oil combustion), tons/year 333.3 Calculated from the distillate oil combustion lb/MMBtu, MMBtu/hr rating of the 

capacity factor

PM10 Emission Reduction, ton/yr 596.3

Annual Costs, $/yr

Incremental cost of distillate oil over residual oil (10 year average), $/MMBtu $2.24 / MMBtu Annual Energy Outlook 2010, Report No. DOE/EIA-0383 2010, Reference Ca

http://www.eia.doe.gov/oiaf/aeo/index.html

Incremental cost of distillate oil over residual oil (10 year average), $/year $ 104,338,496 

Total Annual Cost $ 104,338,496 NOx Cost Effectiveness, $ per ton $31,947 / ton Total annual cost divided by tons of NOx controlled

PM Cost Effectiveness, $ per ton $174,975 / ton Total annual cost divided by tons of PM10 controlled

Table A-9

Distillate Fuel Oil Cost Effectiveness for PM and NOx for Ravenswood No. 10, No. 20 and No. 30 B

% Capacity Factor

Ravenswood Generating Station BART ReportAppendix A Page A-9
Unit ID

Modeled 

Stack Exit 

Velocity

(m/sec)

Stack 

Diameter

(m)

Exhaust 

Temperature

(°F)

Modeled Stack 

Exit Flow

(Actual m3/min)

Modeled Stack 

Exit Flow

(standard 

ft3/min)

Annualized 

Cost of Dry 

ESP (1) 

($/scfm)

Annualized 

of Dry ESP 

Unit 10 48.2 4.05 260 37,295 965,873 $30 $28,976,0Unit 20 48.2 4.11 260 38,425 995,141 $30 $29,854,0Unit 30 34.1 7.16 270 82,535 2,108,023 $30 $63,241,0

$122,071,0

Annual capacity factor 30%

Unit ID

PM emission 

factor before 

control 

(lb/1000 gal)

Unit 

Capacity 

(MMBtu/hr)

PM before 

control (tpy)

% Control offered 

by Dry ESP

PM after control 

(tpy)

PM controlled 

(tpy)

Cost 

Effectiven

($/ton)

Unit 10 5.977 4,204 220.1 99% 2.20 217.9 $133,000/Unit 20 5.977 4,171 218.4 99% 2.18 216.2 $138,100/Unit 30 5.977 9,379 491.1 99% 4.91 486.2 $130,100/

Table A-10

Dry ESP Cost Effectiveness for PM for Ravenswood No. 10, No. 20 and No. 30 Boilers @ 30 % Cap

Factor

Total Cost for the three units

(1) EPA's Air Pollution Control Technology Fact Sheet (EPA-452/F-03-028). Range of $4-$38/scfm given in 2002 $. Average = $(2002$). Converted to 2010 $ by applying a factor of 558/395.6 (Chemical Engineering Plant Cost Index ratio for 2010/2002).

Ravenswood Generating Station BART ReportAppendix A Page A-10
Unit ID

Modeled 

Stack Exit 

Velocity

(m/sec)

Stack 

Diameter

(m)

Exhaust 

Temperature

(°F)

Modeled Stack 

Exit Flow

(Actual m3/min)

Modeled Stack 

Exit Flow

(standard 

ft3/min)

Annualized 

Cost of Wet 

ESP (1) ($/scfm)

Annualized 

of Wet ESP 

Unit 10 48.2 4.05 260 37,295 965,873 $41 $39,601,0Unit 20 48.2 4.11 260 38,425 995,141 $41 $40,801,0Unit 30 34.1 7.16 270 82,535 2,108,023 $41 $86,429,0

$166,831,

Annual capacity factor 30%

Unit ID

PM emission 

factor before 

control 

(lb/1000 gal)

Unit 

Capacity 

(MMBtu/hr)

PM before 

control (tpy)

% Control 

offered by Dry 

ESP

PM after control 

(tpy)

PM controlled 

(tpy)

Cost 

Effectiven

($/ton)

Unit 10 5.977 4,204 220.1 99.0% 2.20 217.91 $181,700/Unit 20 5.977 4,171 218.4 99.0% 2.18 216.20 $188,700/Unit 30 5.977 9,379 491.1 99.0% 4.91 486.16 $177,800/

Table A-11

Wet ESP Cost Effectiveness for PM for Ravenswood No. 10, No. 20 and No. 30 Boilers @ 30 % Cap

Factor

Total Cost for the three units

(1) EPA's Air Pollution Control Technology Fact Sheet (EPA-452/F-03-029). Range of $12-$46/scfm given in 2002 $. Average = (2002$). Converted to 2010 $ by applying a factor of 558/395.6 (Chemical Engineering Plant Cost Index ratio for 2010/2002).

Ravenswood Generating Station BART ReportAppendix A Page A-11