EPA R6 CALPUFF inputs

basecase post-consent decree

Unit 1 Unit 2 Unit 3 Unit 4

heat input (Mbtu/hr) 3707 3688 5758 5649

NOx (lb/Mbtu) 0.33 0.33 0.33 0.33 post-consent decree emission rate (0.30 30-da

NOx (lb/hr) 1223.31 1217.04 1900.14 1864.17

NOx (g/s) 154.4583 153.6667 239.9167 235.375

SO2 (lb/Mbtu) 0.18 0.18 0.18 0.18 from PNM basecase run

SO2 (lb/hr) 667.26 663.84 1036.44 1016.82

SO2 (g/s) 84.25 83.81818 130.8636 128.3864

PM (lb/Mbtu) 0.015 0.015 0.015 0.015 post-consent decree emission rate

PM (lb/hr) 55.605 55.32 86.37 84.735

PM (g/s) 7.020833 6.984848 10.9053 10.69886

SO3 (lb/Mbtu) 0.010925 0.010927 0.010924 0.010922

SO3 (lb/hr) 40.5 40.3 62.9 61.7 SO3 emission rates for combustion are from N

Total SO3 (g/s) 5.113636 5.088384 7.941919 7.790404

SCR with 1.0% SO2 to SO3

Unit 1 Unit 2 Unit 3 Unit 4

heat input (Mbtu/hr) 3707 3688 5758 5649

NOx (lb/Mbtu) 0.07 0.07 0.07 0.07 B&V suggested SCR emission rate

NOx (lb/hr) 259.49 258.16 403.06 395.43

NOx (g/s) 32.76389 32.59596 50.89141 49.92803

SO2 (lb/Mbtu) 0.18 0.18 0.18 0.18 from PNM basecase run

SO2 (lb/hr) 667.26 663.84 1036.44 1016.82

SO2 (g/s) 84.25 83.81818 130.8636 128.3864

PM (lb/Mbtu) 0.015 0.015 0.015 0.015 post-consent decree emission rate

PM (lb/hr) 55.605 55.32 86.37 84.735

PM (g/s) 7.020833 6.984848 10.9053 10.69886

Total SO3 (lb/Mbtu) 0.030807 0.030803 0.030792 0.030802

Total SO3 (lb/hr) 114.2 113.6 177.3 174

Total SO3 (g/s) 14.41919 14.34343 22.38636 21.9697 Total SO3 = SO3 from combustion + SO3 from 

SO3 from SCR (lb/Mbtu)

SO3 from SCR (lb/hr) 73.7 73.3 114.4 112.3 SO3 from SCR is 1.0% of design basis econom

SO3 from SCR (g/s) 9.305556 9.255051 14.44444 14.17929

SCR with 1.0% SO2 to SO3 and inherent removal

Unit 1 Unit 2 Unit 3 Unit 4

heat input (Mbtu/hr) 3707 3688 5758 5649

NOx (lb/Mbtu) 0.07 0.07 0.07 0.07 B&V suggested SCR emission rate

NOx (lb/hr) 259.49 258.16 403.06 395.43

NOx (g/s) 32.76389 32.59596 50.89141 49.92803
SO2 (lb/Mbtu) 0.18 0.18 0.18 0.18 from PNM basecase run

SO2 (lb/hr) 667.26 663.84 1036.44 1016.82

SO2 (g/s) 84.25 83.81818 130.8636 128.3864

PM (lb/Mbtu) 0.015 0.015 0.015 0.015 post-consent decree emission rate

PM (lb/hr) 55.605 55.32 86.37 84.735

PM (g/s) 7.020833 6.984848 10.9053 10.69886

Total SO3 (lb/Mbtu) 0.01689 0.01689 0.016884 0.016886

Total SO3 (lb/hr) 62.61 62.29 97.22 95.39

Total SO3 (g/s) 7.905303 7.864899 12.27525 12.04419 Total SO3 = SO3 from combustion + SO3 from 

SO3 from SCR (lb/Mbtu)

SO3 from SCR (lb/hr) 22.11 21.99 34.32 33.69 SO3 from SCR is 1.0% of design basis econom

SO3 from SCR (g/s) 2.791667 2.776515 4.333333 4.253788 with inherent controls (removal efficiency 40% 

from Appendix A to B&V BART analysis

Design Basis Economizer outlet Unit 1 Unit 2

Sulfur Dioxide (SO2 ), lb/MBtu 1.59 1.59

Sulfur Dioxide (SO2 ), lb/h 5,884 5,854

Sulfur Trioxide (SO3 ), lb/h 74 73

Sulfur Trioxide (SO3 ), lb/MBtu 0.02 0.02

% conversion of SO2 to SO3 by SCR catalyst

1% 73.55 lb/h SO3 73.175 lb/h SO3
ent decree emission rate (0.30 30-day average)

 basecase run

ent decree emission rate

sion rates for combustion are from NPS speciation worksheet, inorganic condensible pm is 100% H2SO4

ested SCR emission rate

 basecase run

ent decree emission rate

 = SO3 from combustion + SO3 from SCR

 SCR is 1.0% of design basis economizer outlet SO2 (see appendix A to b&v BART analysis for design basis)

ested SCR emission rate
 basecase run

ent decree emission rate

 = SO3 from combustion + SO3 from SCR

 SCR is 1.0% of design basis economizer outlet SO2 (see appendix A to b&v BART analysis for design basis)

ent controls (removal efficiency 40% for FGD and 50% for PJFF)

Unit 3 Unit 4

1.59 1.59

9,140 8,967

114 112

0.02 0.02

114.25 lb/h SO3 112.0875 lb/h SO3
EPA R6 CALPUFF inputs

basecase post-consent decree

Unit 1 Unit 2 Unit 3 Unit 4

heat input (Mbtu/hr) 3707 3688 5758 5649

NOx (lb/Mbtu) 0.33 0.33 0.33 0.33 post-consent decree emission rate (0.30 3

NOx (lb/hr) 1223.31 1217.04 1900.14 1864.17

NOx (g/s) 154.4583 153.6667 239.9167 235.375

SO2 (lb/Mbtu) 0.18 0.18 0.18 0.18 from PNM basecase run

SO2 (lb/hr) 667.26 663.84 1036.44 1016.82

SO2 (g/s) 84.25 83.81818 130.8636 128.3864

PM (lb/Mbtu) 0.015 0.015 0.015 0.015 post-consent decree emission rate

PM (lb/hr) 55.605 55.32 86.37 84.735

PM (g/s) 7.020833 6.984848 10.9053 10.69886

Total SO3 (lb/hr) 0.17 0.17 0.27 0.26 * EPRI method for SO3 from boiler 

Total SO3 (g/s) 0.021465 0.021465 0.034091 0.032828

SCR with 0.5% SO2 to SO3

Unit 1 Unit 2 Unit 3 Unit 4

heat input (Mbtu/hr) 3707 3688 5758 5649

NOx (lb/Mbtu) 0.05 0.05 0.05 0.05 recommeded SCR emission rate

NOx (lb/hr) 185.35 184.4 287.9 282.45

NOx (g/s) 23.40278 23.28283 36.35101 35.66288

SO2 (lb/Mbtu) 0.15 0.15 0.15 0.15 presumptive BART limit used by WRAP

SO2 (lb/hr) 556.05 553.2 863.7 847.35

SO2 (g/s) 70.20833 69.84848 109.053 106.9886

PM (lb/Mbtu) 0.015 0.015 0.015 0.015 post-consent decree emission rate

PM (lb/hr) 55.605 55.32 86.37 84.735

PM (g/s) 7.020833 6.984848 10.9053 10.69886

Total SO3 (lb/hr) 0.39 0.39 0.61 0.6 * EPRI method for SO3 from boiler and SC

Total SO3 (g/s) 0.049242 0.049242 0.07702 0.075758

BASE EPRI w/ adjusted SO2 to 0.15 lb/mmBTU limit

Unit 1 Unit 2 Unit 3 Unit 4

heat input (Mbtu/hr) 3707 3688 5758 5649

NOx (lb/Mbtu) 0.33 0.33 0.33 0.33 post-consent decree emission rate (0.30 3

NOx (lb/hr) 1223.31 1217.04 1900.14 1864.17

NOx (g/s) 154.4583 153.6667 239.9167 235.375

SO2 (lb/Mbtu) 0.15 0.15 0.15 0.15 presumptive BART limit used by WRAP

SO2 (lb/hr) 556.05 553.2 863.7 847.35

SO2 (g/s) 70.20833 69.84848 109.053 106.9886
PM (lb/Mbtu) 0.015 0.015 0.015 0.015 post-consent decree emission rate

PM (lb/hr) 55.605 55.32 86.37 84.735

PM (g/s) 7.020833 6.984848 10.9053 10.69886

Total SO3 (lb/hr) 0.17 0.17 0.27 0.26 * EPRI method for SO3 from boiler 

Total SO3 (g/s) 0.021465 0.021465 0.034091 0.032828

SCR with 0.5% SO2 to SO3

Unit 1 Unit 2 Unit 3 Unit 4

heat input (Mbtu/hr) 3707 3688 5758 5649

NOx (lb/Mbtu) 0.05 0.05 0.05 0.05 recommeded SCR emission rate

NOx (lb/hr) 185.35 184.4 287.9 282.45

NOx (g/s) 23.40278 23.28283 36.35101 35.66288

SO2 (lb/Mbtu) 0.15 0.15 0.15 0.15 presumptive BART limit used by WRAP

SO2 (lb/hr) 556.05 553.2 863.7 847.35

SO2 (g/s) 70.20833 69.84848 109.053 106.9886

PM (lb/Mbtu) 0.015 0.015 0.015 0.015 post-consent decree emission rate

PM (lb/hr) 55.605 55.32 86.37 84.735

PM (g/s) 7.020833 6.984848 10.9053 10.69886

Total SO3 (lb/hr) 0.74 0.73 1.15 1.12 * EPRI method for SO3 from boiler and SC

Total SO3 (g/s) 0.093434 0.092172 0.145202 0.141414

SCR with 0.5% SO2 to SO3

Unit 1 Unit 2 Unit 3 Unit 4

heat input (Mbtu/hr) 3707 3688 5758 5649

NOx (lb/Mbtu) 0.05 0.05 0.05 0.05 recommeded SCR emission rate

NOx (lb/hr) 185.35 184.4 287.9 282.45

NOx (g/s) 23.40278 23.28283 36.35101 35.66288

SO2 (lb/Mbtu) 0.15 0.15 0.15 0.15 presumptive BART limit used by WRAP

SO2 (lb/hr) 556.05 553.2 863.7 847.35

SO2 (g/s) 70.20833 69.84848 109.053 106.9886

PM (lb/Mbtu) 0.015 0.015 0.015 0.015 post-consent decree emission rate

PM (lb/hr) 55.605 55.32 86.37 84.735

PM (g/s) 7.020833 6.984848 10.9053 10.69886

Total SO3 (lb/hr) 0.95 0.94 1.47 1.44 * EPRI method for SO3 from boiler and SC

Total SO3 (g/s) 0.119949 0.118687 0.185606 0.181818
0.1971599

ent decree emission rate (0.30 30-day average)

 basecase run

ent decree emission rate

SO3 emission rate lb/Mbtu

ethod for SO3 from boiler 0.00004586 0.00004610 0.00004689 0.00004603

0.17 0.17 0.27 0.26

ded SCR emission rate

ve BART limit used by WRAP

ent decree emission rate

SO3 emission rate lb/Mbtu

ethod for SO3 from boiler and SCR 0.00010521 0.00010575 0.00010594 0.00010621

0.39 0.39 0.61 0.6

ent decree emission rate (0.30 30-day average)

ve BART limit used by WRAP
ent decree emission rate

ethod for SO3 from boiler 

ded SCR emission rate

ve BART limit used by WRAP

ent decree emission rate

SO3 emission rate lb/Mbtu

ethod for SO3 from boiler and SCR w/ NH3 slip = 0.75 ppm 0.00019962 0.00019794 0.00019972

0.74 0.73 1.15

ded SCR emission rate

ve BART limit used by WRAP

ent decree emission rate

Maximum estimated emission rate

SO3 emission rate lb/Mbtu

ethod for SO3 from boiler and SCR w/ NH3 slip = 0.0 ppm 0.00025627 0.00025488 0.00025530

0.95 0.94 1.47
0.19614935 0.306244 0.300447
0.00019827

1.12

0.00025491

1.44
Created by Michael Feldman EPA Region 6

feldman.michael@epa.gov

snyder.erik@epa.gov