1 2 3 4 5 6 7 8 9 10

Capacity Fuel

Unique ID Name Plant Code Unit MW gross Fuel Avg NOx Avg SO2 2011NOx 2011 SO2

160_2 Apache 160 2 204 C 0.371 0.274 0.355 0.274

160_3 Apache 160 3 204 C 0.437 0.308 0.438 0.308

113_2 Cholla 113 2 288.9 C 0.316 0.16 0.295 0.186

113_3 Cholla 113 3 312.3 C 0.250 0.456 0.254 0.145

113_4 Cholla 113 4 414 C 0.195 0.201 0.26 0.14

6177_1 Coronado 6177 1 410.9 C 0.345 0.389 0.301 0.311

6177_2 Coronado 6177 2 410.9 C 0.43 0.382 0.331 0.15

Notes: 1 1 1 1

Notes 1 Determined from data reported to US EPA and available on the Clean Air Markets Division Web Site

2 For Apache, 2008-10 period selected. For Cholla and Coronado, 2011 period selected.

3 This is an estimate for 2008-2011 period based upon reported heat input, capacity and heat rate in NE

4 From NEEDS v4.10

Economic Assumptions: 

Capital Recovery Factor 9.44%

Interest Rate 7.00%

Period (yrs) 20

Insurance 0.30% From Integrated Planning Model ver 4.10 documentationpage 8-11

Property Taxes 0.90% From Integrated Planning Model ver 4.10 documentationpage 8-11

2008-2010 Reported Avg 2011 Reported Rates
11 12 13 14

2008-2011

model NOx model SO2 Capac. Fctr Heat Rate Burner Controls

0.371 62% 11,351 W OFA

0.437 71% 10,898 W OFA

0.295 74% 10,462 T LNC3

0.254 75% 11,143 T LNC3

0.26 72% 10,626 T LNC3

0.303 81% 10,503 W OFA

0.331 89% 9,695 W LNBO

2 2 3 4

Markets Division Web Site

od selected.

capacity and heat rate in NEEDS v4.10

ntationpage 8-11

ntationpage 8-11

modelled rate
Variable Designation Units Value

Unique ID 113_2

Plant Cholla

Unit 2

Unit Size A MW 288.9

Gross Heat Rate C Btu/kwhr 10462

NOx Rate D lb/Mmbtu 0.295

CF J CF 0.74

Type of Coal F prb

Coal Factor G 1.05

Retrofit Factor B 1

HR Factor H 1.0462

Heat Input I Btu/hr 3.02E+09

NOx Removal Eff K % 0.83

NOx Removal factor L 0.875

NOx Removed M lb/hr 7.41E+02

Urea rate (100%) N lb/hr 517

Steam Required O lb/hr 585

Aux. Power P % 0.58

Urea Cost (50% sol) R $/ton 400

Catalyst Cost S $/m3 8000

Aux Power Cost T $/kwh 0.06

Steam Cost U $/Klb 4

Operating Labor Rate V $/hr 60

Capital Cost Calculation (includes equipment, installation, buildings, foundations,electrical, minor physical/chemical ww tr

BMR ($) = SCR 35,083,390

BMF ($) = base reagent preparation cost 2,138,779

BMA ($) = APH (SO@> 3lb/Mmbtu)

BMB ($) = fans/aux power 4,270,073

BM ($) = Total base cost 41,492,241

BM ($/KW) = 144

Total Project Cost

A1 = 10% of BM ($) = Eng. and Construction management 4,149,224

A2 = 10% of BM ($) = Labor adjustment 4,149,224

A3 = 10% of BM ($) = Contractor profit/fees 4,149,224
CECC ($) = Cap., Eng. and management 53,939,914

CECC ($/kw) = 187

B1 = 5% of CECC owners cost -

B2 = 6% of CECC + B1 AFUDC (2yr cycle) -

TPC ($) = Total project cost 53,939,914

TPC ($/kw) = 187

Fixed O&M Cost

FOMO ($/kw-yr) = fixed O&M - additional labor cost 0.2

FOMM ($/kw-yr) = fixed O&M - additional maintenace, mtl and labor cost 1.0

FOM ($/kw-yr) = Total Fixed O&M Cost 1.25

Variable O&M Cost

VOMR ($/MWhr) = Variable O&M - urea 0.72

VOMW ($/MWhr) = Variable O&M - catalyst disposal 0.35

VOMM ($/MWhr) = Variable O&M - steam 0.008

VOM ($/MWhr) = Total Variable O&M Cost 1.07

CR = 9.44%

Property Taxes and Insurance 1.20%

Total Charge Rate 10.64%

Cost of control - $/Ton

CF 74%

Control Efficiency 83%

Uncontrolled Rate (lb/Mbtu*Heat Input)/1000000

NOx Rate (lb/hr) Lb/hr*8760*CF/2000 892

NOx Rate (lb/MMBtu) 0.295

NOx (TPY) 2890

Controlled Rate

NOx Rate (lb/hr) 151.1

NOx Rate (lb/MMBtu) TPC*CR+(FOM*MW)+VOM(MW*8760)*CF 0.05
NOx (TPY) 490

Tons/Year Removed 2400

Total Cost/year $8,113,266

$/Ton $3,380
Calculation

113_3 113_4

Cholla Cholla

3 4

312.3 414

11143 10626.45

0.254 0.26

0.75 0.72

prb prb blends are treated as PRB to be conservative

1.05 1.05 Bit=1; PRB=1.05; Lig=1.07

1 1 1 = typical retrofit

1.1143 1.062645 C/10000

3.48E+09 4.40E+09 A*C*1000

user input

0.80 0.81 for NOx>0.5lb/Mbtu=90%; <.5 = (NOx-0.05)/NOx

0.875 0.875

7.10E+02 9.24E+02 D*I/10^6*K

496 645 M*0.525*60/46*1.01/.99

560 729 N*1.13

0.60 0.59 0.56*(G*H)^0.43

400 400

8000 8000

0.06 0.06

4 4

60 60 Total Labor Cost

minor physical/chemical ww treatment and retrofit difficulty)

 39,940,772 49,554,800

 2,116,337 2,260,403

 4,530,480 4,999,267

 46,587,590 56,814,470

 149 137

 4,658,759 5,681,447

 4,658,759 5,681,447

 4,658,759 5,681,447
 60,563,867 73,858,811

 194 178

 - -

 - -

 60,563,867 73,858,811

 194 178

0.2 0.2

1.0 0.7

1.16 0.88

0.64 0.62

0.35 0.35

0.007 0.007

0.99 0.98

9.44% 9.44%

1.20% 1.20%

10.64% 10.64%

75% 72%

80% 81%

884 1144

0.254 0.260

2904 3607

174.0 220.0

0.05 0.05
572 694

2332 2913

$8,842,201 $10,781,102

$3,792 $3,700
Source for Cost Estimating Info

http://www.epa.gov/airmarkets/progsregs/epa-ipm/BaseCasev410.html#documentation
Variable Designation Units

Unique ID

Plant

Unit

Unit Size A MW

Gross Heat Rate C Btu/kwhr

NOx Rate D lb/Mmbtu

CF J CF

Type of Coal F

Coal Factor G

Retrofit Factor B

HR Factor H

Heat Input I Btu/hr

NOx Removal Factor J

NOx Removal Eff K %

NOx Removed M lb/hr

Urea rate (100%) N lb/hr

Steam Required O lb/hr

Aux. Power P %

Urea Cost (50% sol) R $/ton

Catalyst Cost S $/m3

Aux Power Cost T $/kwh

Steam Cost U $/Klb

Operating Labor Rate V $/hr

Capital Cost Calculation (includes equipment, installation, buildings, foundations,electrical, minor physical/chemical ww tr

BMR ($) = SCR

BMF ($) = base reagent preparation cost

BMA ($) = APH (SO@> 3lb/Mmbtu)

BMB ($) = fans/aux power 

BM ($) = Total base cost

BM ($/KW) = 

Total Project Cost

A1 = 10% of BM ($) = Eng. and Construction management

A2 = 10% of BM ($) = Labor adjustment

A3 = 10% of BM ($) = Contractor profit/fees
CECC ($) = Cap., Eng. and management 

CECC ($/kw) = 

B1 = 5% of CECC owners cost

B2 = 6% of CECC + B1 AFUDC (2yr cycle)

TPC ($) = Total project cost

TPC ($/kw) = 

Fixed O&M Cost

FOMO ($/kw-yr) = fixed O&M - additional labor cost

FOMM ($/kw-yr) = fixed O&M - additional maintenace, mtl and labor cost

FOM ($/kw-yr) = Total Fixed O&M Cost

Variable O&M Cost

VOMR ($/MWhr) = Variable O&M - urea 

VOMW ($/MWhr) = Variable O&M - catalyst disposal

VOMM ($/MWhr) = Variable O&M - steam

VOM ($/MWhr) = Total Variable O&M Cost

CR = 

Property Taxes and Insurance

Total Charge Rate

Cost of control - $/Ton

CF 

Control Efficiency

Uncontrolled Rate (lb/Mbtu*Heat Input)/1000000

NOx Rate (lb/hr) Lb/hr*8760*CF/2000

NOx Rate (lb/MMBtu) 

NOx (TPY) 

NOx rate, ppm

Controlled Rate

NOx Rate (lb/hr) 

NOx Rate (lb/MMBtu) TPC*CR+(FOM*MW)+VOM(MW*8760)*CF

NOx (TPY) 

NOx rate ppm
Min Reactor Potential

ratio of reactor potential

Tons/Year Removed 

Total Cost/year

$/Ton 

cost of controlling to .08 assuming a 1% reduction in capital cost

cost of controlling to .08 assuming a 2% reduction in capital cost

cost of controlling to .08 assuming a 3% reduction in capital cost

cost of controlling to .08 assuming a 4% reduction in capital cost

cost of controlling to .08 assuming a 5% reduction in capital cost
Value

160_2 160_3 6177_1 6177_2 6177_2

Apache Apache Coronado Coronado Coronado

2 3 1 2 2

204 204 410.9 410.9 410.9

11351 10898 10503 9695 9695

0.26 0.31 0.303 0.331 0.331

62.00% 71.00% 81.00% 89.00% 89.00%

prb prb prb prb prb

1.05 1.05 1.05 1.05 1.05

1 1 1 1 1

1.1351 1.0898 1.0503 0.9695 0.9695

2.32E+09 2.22E+09 4.32E+09 3.98E+09 3.98E+09

0.875 0.875 0.875 0.875 0.875

0.81 0.84 0.835 0.85 0.76

4.86E+02 5.69E+02 1.09E+03 1.12E+03 1.00E+03

339 397 763 782 699

383 449 862 884 789

0.60 0.59 0.58 0.56 0.56

400 400 400 400 400

8000 8000 8000 8000 8000

0.06 0.06 0.06 0.06 0.06

4 4 4 4 4

60 60 60 60 60

cal, minor physical/chemical ww treatment and retrofit difficulty)

 20,593,050 19,835,737 36,515,317 33,922,728 33,922,728

 1,924,640 2,002,376 2,356,820 2,371,545 2,305,543

 3,818,054 3,753,301 4,959,112 4,795,152 4,795,152

 26,335,745 25,591,415 43,831,249 41,089,425 41,023,423

 129 125 107 100 100

 2,633,574 2,559,141 4,383,125 4,108,943 4,102,342

 2,633,574 2,559,141 4,383,125 4,108,943 4,102,342

 2,633,574 2,559,141 4,383,125 4,108,943 4,102,342
 34,236,468 33,268,839 56,980,624 53,416,253 53,330,450

 168 163 139 130 130

 - - - - -

 - - - - -

 34,236,468 33,268,839 56,980,624 53,416,253 53,330,450

 168 163 139 130 130

0.3 0.3 0.2 0.2 0.2

1.5 1.5 0.7 0.7 0.7

1.78 1.78 0.88 0.88 0.88

0.67 0.78 0.74 0.76 0.68

0.35 0.35 0.35 0.35 0.35

0.008 0.009 0.008 0.009 0.008

1.02 1.14 1.10 1.12 1.04

9.44% 9.44% 9.44% 9.44% 9.44%

1.20% 1.20% 1.20% 1.20% 1.20%

10.64% 10.64% 10.64% 10.64% 10.64%

62% 71% 81% 89% 89%

81% 84% 83% 85% 76%

601 680 1308 1319 1319

0.260 0.306 0.303 0.331 0.331

1633 2115 4639 5140 5140

231.7 231.7

115.8 111.2 215.8 199.2 318.7

0.05 0.05 0.05 0.05 0.08

314 346 766 776 1242

35 56
4.5986 4.4869

1319 1769 3874 4364 3898

$5,138,017 $5,346,022 $9,634,654 $9,633,149 $9,360,704

$3,896 $3,022 $2,487 $2,208 $2,402

585

1 0.01 $9,303,964.21

2 0.02 $9,247,224.38

3 0.03 $9,190,484.56

4 0.04 $9,133,744.73

5 0.05 $9,077,004.91
Source for Cost Estimating Info

Calculation

to be conservative, all units assumed to be prb

Bit=1; PRB=1.05; Lig=1.07

1 = typical retrofit

C/10000

A*C*1000

for NOx>0.5lb/Mbtu=90%; <.5 = (NOx-0.05)/NOx

D*I/10^6*K

M*0.525*60/46*1.01/.99

N*1.13

0.56*(G*H)^0.43

http://www.epa.gov/airmarkets/progsregs/epa-ipm/BaseCasev410.html#

Total Labor Cost

low dust SCR BMR assumed to be 75% of the cost of high dust SCR
 85,803

0.16% estimated difference in capital cost for S&L model

700 ppm NOx roughly equivalent to 1.0 lb

2 ppm slip maximum allowed ammoni
Minimum reactor potential is estimated by taking the log of 

1.0249 Reactor potential is used to estimate the necessary catalyst l

As indicated here, roughly 2.5% more catalyst would be insta

$56,739.83 $122

$113,479.65 $244

$170,219.48 $365

$226,959.31 $487

$283,699.13 $609
pa-ipm/BaseCasev410.html#documentation
n capital cost for S&L model.

roughly equivalent to 1.0 lb/MMBtu

maximum allowed ammonia slip
mated by taking the log of the estimated inlet ammonia divided by the maximum allowed outlet ammonia (assumed 2 ppm) at design 

ate the necessary catalyst loading and is proportional to the catalyst loading

more catalyst would be installed in the case of controlling to 0.05 lb/MMBtu versus 0.08 lb/MMBtu.


monia (assumed 2 ppm) at design conditions.
Variable Designation Units Value

Unique ID 113_2 113_3 113_4

Plant Cholla Cholla Cholla

Unit 2 3 4

Unit Size A MW 288.9 312.3 414

Heat Rate C Btu/kwhr 10462 11143 10626.45

NOx Rate D lb/Mmbtu 0.295 0.254 0.26

CF I % 0.74 0.75 0.72

Type of fuel prb prb prb

Coal Factor F 1.05 1.05 1.05

Retrofit Factor B 1 1 1

HR Factor G 1.0462 1.1143 1.062645

Heat Input H Btu/hr 3.02E+09 3.48E+09 4.40E+09

NOx Removal Eff J % 30% 30% 30%

NOx Removed K lb/hr 2.67E+02 2.65E+02 3.43E+02

Urea rate (100%) L lb/hr 697.80 691.76 895.17

Water Required M lb/hr 6280 6226 8057

Aux. Power N % 0.05 0.05 0.05

Dilution water rate O (1000gph) 0.754 0.747 0.967

Urea Cost (50% sol) Urea Cost (50% sol) P $/ton 400 400 400

Aux Power Cost Q $/kwh 0.06 0.06 0.06

Dilution water Cost R $/Kgal 1 1 1

Operating Labor Rate S $/hr 60 60 60

Includes equipment, inatallation,buildings,electrical, retrofit difficulty

BMS ($) = 4785093 5172671 6857143

BMA ($) = 

BMB ($) = 

BM ($) = 4,785,093 5,172,671 6,857,143

BM ($/KW) = 17 17 17

Total Project Cost

A1 = 5% of BM ($) = 239255 258634 342857

A2 = 5% of BM ($) = 239255 258634 342857

A3 = 5% of BM ($) = 239255 258634 342857

CECC ($) = 5,502,857 5,948,571 7,885,714
CECC ($/kw) = 19 19 19

B1 = 5% of CECC 275,143 297,429 394,286

TPC ($) = 5,778,000 6,246,000 8,280,000

TPC ($/kw) = 20 20 20

Fixed O&M Cost

FOMO ($/kw-yr) = 0.21599 0.19981 0.15072

FOMM ($/kw-yr) = 0.20 0.20 0.20

FOM ($/kw-yr) = 0.41 0.40 0.35

Variable O&M Cost

VOMR ($/MWhr) = 0.97 0.89 0.86

VOMM ($/MWhr) = 0.0002 0.0002 0.0001

VOM ($/MWhr) = 0.97 0.89 0.87

CR = 9.44% 9.44% 9.44%

Property Taxes and Insurance 1.20% 1.20% 1.20%

Total Charge Rate 10.64% 10.64% 10.64%

Cost of control - $/Ton

CF 74% 75% 72%

Control Efficiency 30% 30% 30%

Uncontrolled Rate

NOx Rate (lb/hr) 892 884 1144

NOx Rate (lb/MMBtu) 0.295 0.254 0.26

NOx (TPY) 2890 2904 3607

Controlled Rate

NOx Rate (lb/hr) 624 619 801

NOx Rate (lb/MMBtu) 0.21 0.18 0.18

NOx (TPY) 2023 2033 2525

Tons/Year Removed 867 871 1082
Total Cost/year $2,544,307 $2,607,329 $3,284,409

$/Ton $2,935 $2,993 $3,035
160_2 160_3 6177_1 6177_2

Apache Apache Coronado Coronado

2 3 1 2

204 204 410.9 410.9

11351 10898 10503 9695

0.26 0.31 0.303 0.331

0.62 0.71 0.81 0.89

prb prb prb prb

1.05 1.05 1.05 1.05

1 1 1 1

1.1351 1.0898 1.0503 0.9695

2.32E+09 2.22E+09 4.32E+09 3.98E+09

30% 30% 30% 20%

1.80E+02 2.04E+02 3.92E+02 2.64E+02

470.63 532.23 1023.38 687.96

4236 4790 9210 6192

0.05 0.05 0.05 0.05

0.508 0.575 1.105 0.743

400 400 400 400

0.06 0.06 0.06 0.06

1 1 1 1

60 60 60 60

3378882 3378882 6805797 6805797

 3,378,882 3,378,882 6,805,797 6,805,797

 17 17 17 17

168944 168944 340290 340290

168944 168944 340290 340290

168944 168944 340290 340290

 3,885,714 3,885,714 7,826,667 7,826,667
 19 19 19 19

 194,286 194,286 391,333 391,333

 4,080,000 4,080,000 8,218,000 8,218,000

 20 20 20 20

0.30588 0.30588 0.15186 0.15186

0.20 0.20 0.20 0.20

0.50 0.50 0.35 0.35

0.92 1.04 1.00 0.67

0.0003 0.0003 0.0001 0.0001

0.92 1.04 1.00 0.67

9.44% 9.44% 9.44% 9.44%

1.20% 1.20% 1.20% 1.20%

10.64% 10.64% 10.64% 10.64%

62% 71% 81% 89%

30% 30% 30% 20%

601 680 1308 1319

0.2597 0.3059 0.303 0.331

1633 2115 4639 5140

421 476 915 1055

0.18 0.21 0.21 0.26

1143 1480 3248 4112

490 634 1392 1028
$1,559,793 $1,861,511 $3,923,430 $3,164,330

$3,184 $2,934 $2,819 $3,078
Calculation

For Apache, inlet NOx assumes LNB

PRB assumed to be conservative

Bit=1; PRB=1.05; Lig=1.07; gas=1 

1 = typical retrofit

C/10000

A*C*1000

30% - coal; 20% - gas actual NOx reduction will vary depending upon process specifics. 30% is s

D*H/10^6*j

K/UF/46*30; For CFB and SO2>3 then UF=0.25; otherwise UF=0.15 

L*9

M*0.12/1000

Total Labor Cost

SNCR

APH (SO@> 3lb/Mmbtu); 65000*B*(A*G)^.78

BOP

Total base cost

Eng. and Construction management

Labor adjustment

Contractor profit/fees

Cap., Eng. and management http://www.epa.gov/airmarkets/progsregs/epa-ip
Note: Capital Cost equations were modified to be 

owners cost See: NESCAUM, Control Technologies 

and Air Pollution Control T

Total project cost

It was assumed that SNCR capital cost was $20/kW for all applications

fixed O&M - additional labor cost

fixed O&M - additional maintenace, mtl and labor cost

Total Fixed O&M Cost

Variable O&M - urea 

Variable O&M - dilution water

Total Variable O&M Cost

(lb/Mbtu*Heat Input)/1000000

Lb/hr*8760*CF/2000

TPC*CR+(FOM*MW)+VOM(MW*8760)*CF

n process specifics. 30% is selected as conservative - under the 35% value in Chapter 5 of the IPM documentation

irmarkets/progsregs/epa-ipm/BaseCasev410.html#documentation
uations were modified to be a constant $20/kWe because this is simpler and is also more consistent with my experience with this tech

AUM, Control Technologies to Reduce Conventional and Hazardous Air Pollutants from Coal-Fired Power Plants, March 21, 2011, Page 1

and Air Pollution Control Technology Fact Sheet, http://www.epa.gov/ttncatc1/dir1/fsncr.pdf


with my experience with this technology. S&L assumes scaling factors that I believe will overestimate BMS for smaller units and possib

wer Plants, March 21, 2011, Page 17


BMS for smaller units and possibly underestimate costs for larger units.
BASE COSTS

Boiler Type TECHNOLOGY Capital 

($/kw)

OFA Wall-Fired LNB 45

Wall-Fired LNB + OFA 61

T-Fired LNC1 24

T-Fired LNC2 33

T-Fired LNC3 38

Vertical-Fired NOx Comb Control 29

Variable Designation Units Value

Unique ID 160_2

Plant Apache

Unit 2

Unit Size A MW 204

Gross Heat Rate C Btu/kwhr 11351

NOx Rate D lb/Mmbtu 0.371

CF J % 62.00%

NOx Controls OFA

Retrofit Factor B 1.00

Heat Input I Btu/hr 2.32E+09

NOx Removal Eff K % 30.00%

NOx Removed M lb/hr 257.73

Aux Power Cost T $/kwh 0.06

Steam Cost U $/Klb 4.00

Operating Labor Rate V $/hr 60.00

TPC ($) = 10,543,189

Base Cost 45

TPC ($/kw) = 51.7

Fixed O&M Cost

FOM ($/kw-yr) = 0.34
VOM ($/MWhr) = 0.07

CR = 9.44%

Property Taxes and Insurance 1.20%

Total Charge Rate 10.64%

Cost of control - $/Ton

CF 62%

Control Efficiency 30%

Uncontrolled Rate

NOx Rate (lb/hr) 859

NOx Rate (lb/MMBtu) 0.371

NOx (TPY) 2333

Controlled Rate

NOx Rate (lb/hr) 601

NOx Rate (lb/MMBtu) 0.26

NOx (TPY) 1633

Tons/Year Removed 700

Total Cost/year $1,269,566

$/Ton $1,814
FOM VOM REM Eff

($/kw-yr) mills/kwhr)

0.3 0.07 0.3

0.4 0.09

0.2 0

0.2 0.03

0.3 0.03

0.2 0.06

Calculation

160_3

Apache

3

204 user input

10898 user input

0.437 user input

71.00% user input

OFA

1.00 1 = typical retrofit

2.22E+09 A*C*1000

30.00% user input

291.46 D*I/10^6*K

0.06

4.00

60.00 Total Labor Cost

 10,543,189 Total project cost

 45

 51.7

0.34 Total Fixed O&M Cost
0.07 Total Variable O&M Cost

9.44%

1.20%

10.64%

71%

30%

(lb/Mbtu*Heat Input)/1000000

972 Lb/hr*8760*CF/2000

0.437

3021

680

0.31 TPC*CR+(FOM*MW)+VOM(MW*8760)*CF

2115

906

$1,280,825

$1,413
SCALING FACTORS (TPC and FOM)

Wall- and T-fired = (base cost)*(300/MW)^0.359

Vertical-fired = (base cost)*(300/MW)^0.553

See Chapter 5

http://www.epa.gov/airmarkets/progsregs/epa-ipm/BaseCasev410.html#documentation

Apache 2

LNB SNCR - post LNB SCR - Post LNB LNB+SNCR

CF 62% 62% 62%

Control Efficiency 30% 30% 81% 51%

Uncontrolled Rate

NOx Rate (lb/hr) 859 601 601 859

NOx Rate (lb/MMBtu) 0.37 0.26 0.26 0.37

NOx (TPY) 2333 1633 1633 2333

Controlled Rate

NOx Rate (lb/hr) 601 421 116 421

NOx Rate (lb/MMBtu) 0.26 0.18 0.05 0.18

NOx (TPY) 1633 1143 314 1143

Tons/Year Removed 700 490 1319 1190

Total Cost/year $1,269,566 $1,559,793 $5,138,017 $2,829,359

$/Ton $1,814 $3,184 $3,896 $2,378

Incremental $/ton $1,814 $3,184

Apache 3

LNB SNCR - post LNB SCR - Post LNB LNB+SNCR

CF 71% 71% 71%

Control Efficiency 30% 30% 84% 51%

Uncontrolled Rate

NOx Rate (lb/hr) 972 680 680 972

NOx Rate (lb/MMBtu) 0.44 0.31 0.31 0.44

NOx (TPY) 3021 2115 2115 3021

Controlled Rate

NOx Rate (lb/hr) 680 476 111 476

NOx Rate (lb/MMBtu) 0.31 0.21 0.05 0.21

NOx (TPY) 2115 1480 346 1480

Tons/Year Removed 906 634 1769 1541

Total Cost/year $1,280,825 $1,861,511 $5,346,022 $3,142,336

$/Ton $1,413 $2,934 $3,022 $2,039

Incremental $/ton $1,413 $2,934
LNB+SCR

87%

859

0.37

2333

116

0.05

314

2019

version 1 difference

$6,407,583 $6,697,809 -$290,227

$3,174 $3,318 -$144

$3,896 $4,117 -$220

LNB+SCR

89%

972

0.44

3021

111

0.05

346

2676

version 1 difference

$6,626,847 $7,207,534 -$580,687

$2,477 $2,694 -$217

$3,022 $3,350 -$328
Cholla 2

SNCR SCR

CF 74% 74%

Control Efficiency 30% 83%

Uncontrolled Rate

NOx Rate (lb/hr) 892 892

NOx Rate (lb/MMBtu) 0.295 0.295

NOx (TPY) 2890 2890

Controlled Rate

NOx Rate (lb/hr) 624 151

NOx Rate (lb/MMBtu) 0.21 0.05

NOx (TPY) 2023 490

Tons/Year Removed 867 2400

Total Cost/year $2,544,307 $8,113,266

$/Ton $2,935 $3,380

Incremental Rate $2,935 $3,632

Cholla 3

SNCR SCR

CF 75% 75%

Control Efficiency 30% 80%

Uncontrolled Rate

NOx Rate (lb/hr) 884 884

NOx Rate (lb/MMBtu) 0.25 0.25

NOx (TPY) 2904 2904

Controlled Rate

NOx Rate (lb/hr) 619 174

NOx Rate (lb/MMBtu) 0.18 0.05

NOx (TPY) 2033 572

Tons/Year Removed 871 2332

Total Cost/year $2,607,329 $8,842,201

$/Ton $2,993 $3,792

Incremental Rate $2,993 $4,268

Cholla 4

SNCR SCR
CF 72% 72%

Control Efficiency 30% 81%

Uncontrolled Rate

NOx Rate (lb/hr) 1144 1144

NOx Rate (lb/MMBtu) 0.26 0.26

NOx (TPY) 3607 3607

Controlled Rate

NOx Rate (lb/hr) 801 220

NOx Rate (lb/MMBtu) 0.18 0.05

NOx (TPY) 2525 694

Tons/Year Removed 1082 2913

Total Cost/year $3,284,409 $10,781,102

$/Ton $3,035 $3,700

Incremental Rate $3,035 $4,094
Coronado 1

SNCR SCR

CF 81% 81%

Control Efficiency 30% 83%

Uncontrolled Rate

NOx Rate (lb/hr) 1308 1308

NOx Rate (lb/MMBtu) 0.303 0.303

NOx (TPY) 4639 4639

Controlled Rate

NOx Rate (lb/hr) 915 216

NOx Rate (lb/MMBtu) 0.21 0.05

NOx (TPY) 3248 766

Tons/Year Removed 1392 3874

Total Cost/year $3,923,430 $9,634,654

$/Ton $2,819 $2,487

Incremental Rate $2,819 $2,301

Coronado 2

SCR

comparison of SCR 

control cases

CF 89% 89% 89%

Control Efficiency 76% 85% 0.375

Uncontrolled Rate

NOx Rate (lb/hr) 1319 1319 319

NOx Rate (lb/MMBtu) 0.33 0.33 0

NOx (TPY) 5140 5140 1242

Controlled Rate

NOx Rate (lb/hr) 319 199 199

NOx Rate (lb/MMBtu) 0.08 0.05 0

NOx (TPY) 1242 776 776

Tons/Year Removed 3898 4364 466

Total Cost/year $9,360,704 $9,633,149 $272,445

$/Ton $2,402 $2,208 $585

Incremental Rate $585