25 Pa. Code § 123.121
The provisions of this § 123.121 adopted September 22, 2000, effective September 23, 2000, 30 Pa.B. 4899.

This appendix cited in 25 Pa. Code § 123.11 (relating to combustion units).

This appendix cited in 25 Pa. Code § 123.13 (relating to processes).

This appendix cited in 25 Pa. Code § 123.13 (relating to processes).
| Applicable Regulation | Opacity/Mass Limitation | Procedure |
| A. Sources subject to EPA NSPS | Opacity limit specified in NSPS | EPA procedure for AOL applies |
| Opacity limit not specified in NSPS | DER procedure will be used to establish AOL at the NSPS level for mass emissions | |
| B. Sources subject to nonattainment area provisions (LAER applies) | Emission limitation will be specified in permit | DER procedure will be used to establish AOL at the maximum mass emissions rate specified as LAER |
| C. Sources subject to permit requirements (e.g., BACT) | Mass emission rate specific in PAA or permit | DER procedure will be used to establish AOL at BACT mass emission rate |
| No mass emission rate specified in PAA or permit (e.g., equipment specification), 2 cases | ||
| 1. No opacity limit specified in PAA or permit | Not eligible for AOL | |
| 2. No opacity limit specified in PAA or permit (mass emission rate and opacity limits under DER regulation are assumed to apply) | DER procedure will be used to establish AOL at the regulatory emission rate | |
| D. Sources subject only to DER regulations (RACT)—no permit conditions apply | Mass emission limitation specified in DER regulation | DER procedure will be used to establish AOL at the regulatory emission rate |
| No mass emission limitation specified in DER regulation | Not eligible for AOL |
NOTE: Sources incapable of a stack test are ineligible for an AOL
Abbreviations: AOL—alternative opacity limitation
NSPS—New source performance standards
PAA—plan approval application
BACT—best available control technology
LAER—lowest achievable emission rate
RACT—reasonably available control technology
PSD—prevention of significant deterioration
This appendix cited in 25 Pa. Code § 123.45 (relating to alternative opacity limitations).
The provisions of this Appendix D adopted June 19, 1981, effective June 20, 1981, 11 Pa.B. 1447; corrected June 26, 1981, effective June 20, 1981, 11 Pa.B. 2225.
| BONUS ALLOWANCE | |||||
| Baseline | |||||
| County | Facility | Combustion Source Name Point ID | Allowance | NOx lb/MMBtu | |
| Adams | Met Edison Hamilton | 031 | 4 | 0.59 | |
| Adams | Met Edison Ortanna | 031 | 3 | 0.59 | |
| Adams | Metropolitan Edison Company | G. E. N Frame Turbine #1 | 031 | 17 | 0.45 |
| Adams | Metropolitan Edison Company | G. E. N Frame Turbine #2 | 032 | 6 | 0.45 |
| Adams | Metropolitan Edison Company | G. E. N Frame Turbine #3 | 033 | 14 | 0.45 |
| Allegheny | Duquesne Light Company, Cheswick | Boiler | 001 | 2,500 | 0.73 |
| Armstrong | Penelec—Keystone | Boiler No. 1 | 031 | 4,334 | 0.80 |
| Armstrong | Penelec—Keystone | Boiler No. 2 | 032 | 3,439 | 0.79 |
| Armstrong | West Penn Power Co. | Foster Wheeler | 031 | 1,137 | 0.95 |
| Armstrong | West Penn Power Co. | Foster Wheeler | 032 | 1,063 | 1.02 |
| Beaver | AES Beaver Valley Partners, Inc. | Babcock and Wilcox | 032 | 301 | 0.83 |
| Beaver | AES Beaver Valley Partners, Inc. | Babcock and Wilcox | 033 | 247 | 0.83 |
| Beaver | AES Beaver Valley Partners, Inc. | Babcock and Wilcox | 034 | 286 | 0.83 |
| Beaver | AES Beaver Valley Partners, Inc. | Babcock and Wilcox | 035 | 154 | 0.81 |
| Beaver | Penn Power Co.—Bruce Mansfield | Boiler Unit 1 | 031 | 2,987 | 0.90 |
| Beaver | Penn Power Co.—Bruce Mansfield | Foster Wheeler Unit No. 2 | 032 | 3,857 | 0.90 |
| Beaver | Penn Power Co.—Bruce Mansfield | Foster Wheeler Unit 3 | 033 | 3,497 | 0.70 |
| Beaver | Zinc Corporation Of America | Coal Boiler 1 | 034 | 240 | 0.80 |
| Beaver | Zinc Corporation Of America | Coal Boiler 2 | 035 | 203 | 0.80 |
| Berks | Metropolitan Edison Co.—Titus | Unit 1 | 031 | 202 | 0.65 |
| Berks | Metropolitan Edison Co.—Titus | Unit 2 | 032 | 186 | 0.68 |
| Berks | Metropolitan Edison Co.—Titus | Unit 3 | 033 | 201 | 0.66 |
| Berks | Metropolitan Edison Co.—Titus | No. 4 Combustion Turbine | 034 | 2 | 0.44 |
| Berks | Metropolitan Edison Co.—Titus | No. 5 Combustion Turbine | 035 | 2 | 0.44 |
| Blair | Penelec—Williamsburg | No. 11 Boiler—Rily | 031 | 38 | 0.87 |
| Bucks | PECO Energy—Falls | Unit 1 | 7 | 0.67 | |
| Bucks | PECO Energy—Falls | Unit 2 | 7 | 0.67 | |
| Bucks | PECO Energy—Falls | Unit 3 | 6 | 0.67 | |
| Bucks | PECO Energy—Croyden | Croyden—Turbine #11 | 031 | 11 | 0.70 |
| Bucks | PECO Energy—Croyden | Croyden—Turbine #12 | 032 | 7 | 0.70 |
| Bucks | PECO Energy—Croyden | Croyden—Turbine #21 | 033 | 44 | 0.70 |
| Bucks | PECO Energy—Croyden | Croyden—Turbine #22 | 034 | 20 | 0.70 |
| Bucks | PECO Energy—Croyden | Croyden—Turbine #31 | 035 | 11 | 0.70 |
| Bucks | PECO Energy—Croyden | Croyden—Turbine #32 | 036 | 14 | 0.70 |
| Bucks | PECO Energy—Croyden | Croyden—Turbine #41 | 037 | 8 | 0.70 |
| Bucks | PECO Energy—Croyden | Croyden—Turbine #42 | 038 | 38 | 0.70 |
| Bucks | PECO Energy—Fairless Hills | Power House Boiler No. 3 | 043 | 63 | 0.26 |
| Bucks | PECO Energy—Fairless Hills | Power House Boiler No. 4 | 044 | 14 | 0.27 |
| Bucks | PECO Energy—Fairless Hills | Power House Boiler No. 5 | 045 | 73 | 0.26 |
| Bucks | PECO Energy—Fairless Hills | Power House Boiler No. 6 | 046 | 84 | 0.26 |
| Cambria | Cambria CoGen Company | A Boiler | 031 | 199 | 0.24 |
| Cambria | Cambria CoGen Company | B Boiler | 032 | 210 | 0.23 |
| Cambria | Colver Power Project | 409 | 0.20 | ||
| Cambria | Ebensburg Power Company | CFB Boiler | 205 | 0.08 | |
| Carbon | Panther Creek Energy Facility | Boiler 1 | 119 | 0.12 | |
| Carbon | Panther Creek Energy Facility | Boiler 2 | 116 | 0.12 | |
| Chester | PECO Energy—Cromby | Boiler No 1 | 031 | 246 | 0.82 |
| Chester | PECO Energy—Cromby | Boiler No 2 | 032 | 186 | 0.28 |
| Clarion | Piney Creek Project | CFB Boiler | 121 | 0.18 | |
| Clearfield | Penelec—Shawville | Babcock Wilcox Boiler | 031 | 979 | 1.22 |
| Clearfield | Penelec—Shawville | Babcock Wilcox Boiler | 032 | 945 | 1.21 |
| Clearfield | Penelec—Shawville | Combustion Engineering | 033 | 850 | 0.86 |
| Clearfield | Penelec—Shawville | Combustion Engineering | 034 | 692 | 0.87 |
| Clinton | International Paper Co. | 1 Riley Stoker Vo-Sp | 033 | 145 | 0.55 |
| Clinton | International Paper Co. | 2 Riley Stoker Vo-Sp | 034 | 145 | 0.55 |
| Clinton | PP&L—Lock Haven | CT 1 | 3 | 0.49 | |
| Columbia | Penelec—Benton | 002 | 1 | 2.33 | |
| Columbia | Penelec—Benton | 003 | 1 | 2.93 | |
| Cumberland | Metropolitan Edison Company | G.E. N Frame Turbine | 031 | 9 | 0.45 |
| Cumberland | Metropolitan Edison Company | G.E. N Frame Turbine | 032 | 11 | 0.45 |
| Cumberland | PP&L—West Shore | CT 1 | 3 | 0.49 | |
| Cumberland | PP&L—West Shore | CT 2 | 3 | 0.49 | |
| Dauphin | PP&L—Harrisburg | CT 1 | 3 | 0.49 | |
| Dauphin | PP&L—Harrisburg | CT 2 | 4 | 0.49 | |
| Dauphin | PP&L—Harrisburg | CT 3 | 4 | 0.49 | |
| Dauphin | PP&L—Harrisburg | CT 4 | 4 | 0.49 | |
| Delaware | Tosco Refinery | 7 Boiler | 032 | 33 | 0.37 |
| Delaware | Tosco Refinery | 8 Boiler | 033 | 54 | 0.48 |
| Delaware | Tosco Refinery | Platformer Heater | 038 | 180 | 0.55 |
| Delaware | Tosco Refinery | 543 Crude Heater | 044 | 101 | 0.55 |
| Delaware | Tosco Refinery | 544 Crude Heater | 045 | 115 | 0.55 |
| Delaware | PECO Energy— Eddystone | No. 1 Boiler | 031 | 660 | 0.54 |
| Delaware | PECO Energy— Eddystone | No. 2 Boiler | 032 | 430 | 0.55 |
| Delaware | PECO Energy— Eddystone | No. 3 Boiler | 033 | 255 | 0.28 |
| Delaware | PECO Energy— Eddystone | No. 30 Gas Turbine | 039 | 2 | 0.48 |
| Delaware | PECO Energy— Eddystone | No. 40 Gas Turbine | 040 | 1 | 0.49 |
| Delaware | PECO Energy— Eddystone | No. 4 Boiler | 041 | 248 | 0.28 |
| Delaware | Kimberly—Clark | Boiler No. 9 | 034 | 12 | 0.52 |
| Delaware | Kimberly—Clark | 10 Culm Cogen. Fbc Plant | 035 | 84 | 0.08 |
| Delaware | Sun Refining & Marketing | 089 | 86 | 0.09 | |
| Delaware | FPL Energy | 090 | 145 | 0.08 | |
| Erie | General Electric Co. | B & W Boiler No. 2 | 032 | 26 | 1.01 |
| Erie | International Paper Company | Coal Fired Boiler No. 21 | 037 | 68 | 0.58 |
| Erie | Norcon Power Partners | Turbine 1 | 001 | 50 | 0.07 |
| Erie | Norcon Power Partners | Turbine 2 | 002 | 50 | 0.07 |
| Erie | Penelec—Front Street | Erie City Iron Works No. 7 | 031 | 5 | 0.92 |
| Erie | Penelec—Front Street | Erie City Iron Works No. 8 | 032 | 5 | 0.90 |
| Erie | Penelec—Front Street | Comb. Eng. Boiler No. 9 | 033 | 133 | 0.57 |
| Erie | Penelec—Front Street | Comb. Eng. Boiler No. 10 | 034 | 133 | 0.57 |
| Greene | West Penn Power— Hatfield’s Ferry | Babcock & Wilcox | 031 | 3,969 | 1.04 |
| Greene | West Penn Power— Hatfield’s Ferry | Babcock & Wilcox | 032 | 3,694 | 1.04 |
| Greene | West Penn Power— Hatfield’s Ferry | Babcock & Wilcox | 033 | 2,154 | 1.04 |
| Indiana | Penelec—Conemaugh | Boiler No. 1 | 031 | 3,288 | 0.76 |
| Indiana | Penelec—Conemaugh | Boiler No. 2 | 032 | 4,187 | 0.76 |
| Indiana | Penelec—Homer City | Boiler No. 1-Foster Whelr | 031 | 3,160 | 1.20 |
| Indiana | Penelec—Homer City | Boiler No. 2-Foster Whelr | 032 | 3,978 | 1.20 |
| Indiana | Penelec—Homer City | Boiler No. 3-B.& W. | 033 | 2,924 | 0.62 |
| Indiana | Penelec—Seward | Boiler No. 12 (B&W) | 032 | 144 | 0.84 |
| Indiana | Penelec—Seward | Boiler No. 14 (B&W) | 033 | 146 | 0.83 |
| Indiana | Penelec—Seward | Boiler No. 15 (Comb.Eng.) | 931 | 672 | 0.75 |
| Lackawanna | Archbald Power Corporation | Cogen | 81 | 0.05 | |
| Lancaster | PP&L—Holtwood | Unit 17 Foster Wheeler | 934 | 806 | 1.20 |
| Lawrence | Penn Power Co.—New Castle | Foster Wheeler | 031 | 108 | 0.91 |
| Lawrence | Penn Power Co.—New Castle | B.W. Boiler | 032 | 97 | 0.91 |
| Lawrence | Penn Power Co.—New Castle | Babcock And Wilcox | 033 | 185 | 0.91 |
| Lawrence | Penn Power Co.—New Castle | Babcock And Wilcox | 034 | 339 | 0.91 |
| Lawrence | Penn Power Co.—New Castle | Babcock And Wilcox | 035 | 620 | 0.91 |
| Lehigh | PP&L—Allentown | CT 1 | 2 | 0.49 | |
| Lehigh | PP&L—Allentown | CT 2 | 3 | 0.49 | |
| Lehigh | PP&L—Allentown | CT 3 | 3 | 0.49 | |
| Lehigh | PP&L—Allentown | CT 4 | 3 | 0.49 | |
| Lycoming | PP&L—Williamsport | CT 1 | 3 | 0.49 | |
| Lycoming | PP&L—Williamsport | CT 2 | 3 | 0.49 | |
| Luzerne | Continental Energy Associates | Turbine | 267 | 0.13 | |
| Luzerne | Continental Energy Associates | HRSG | 128 | 0.20 | |
| Luzerne | UGI Corp.—Hunlock Power | Foster Wheeler | 031 | 374 | 0.95 |
| Luzerne | PP&L—Jenkins | CT 1 | 3 | 0.49 | |
| Luzerne | PP&L—Jenkins | CT 2 | 2 | 0.49 | |
| Luzerne | PP&L—Harwood | CT 1 | 3 | 0.49 | |
| Luzerne | PP&L—Harwood | CT 2 | 3 | 0.49 | |
| Monroe | Met Edison Shawnee | 031 | 3 | 0.59 | |
| Montgomery | Merck Sharp & Dohme | Cogen II Gas Turbine | 039 | 79 | 0.16 |
| Montgomery | PECO Energy—Moser | Unit 1 | 7 | 0.67 | |
| Montgomery | PECO Energy—Moser | Unit 2 | 7 | 0.67 | |
| Montgomery | PECO Energy—Moser | Unit 3 | 6 | 0.67 | |
| Montour | PP&L—Montour | Montour No. 1 | 031 | 3,568 | 0.85 |
| Montour | PP&L—Montour | Montour No. 2 | 032 | 4,696 | 1.07 |
| Montour | PP&L—Montour | Aux.Start-Up Boiler No. 1 | 033 | 9 | 0.17 |
| Montour | PP&L—Montour | Aux.Start-Up Boiler No. 2 | 034 | 7 | 0.17 |
| Northampton | Bethlehem Steel Corp. | Boiler 1 Boiler House 2 | 041 | 91 | 0.23 |
| Northampton | Bethlehem Steel Corp. | Boiler 2 Boiler House 2 | 042 | 91 | 0.23 |
| Northampton | Bethlehem Steel Corp. | Boiler 3 Boiler House 2 | 067 | 92 | 0.23 |
| Northampton | Met Edison Co.—Portland | Unit No. 1 | 031 | 462 | 0.59 |
| Northampton | Met Edison Co.—Portland | Unit No. 2 | 032 | 657 | 0.66 |
| Northampton | Met Edison Co.—Portland | Combustion Turbine No. 3 | 033 | 1 | 0.53 |
| Northampton | Met Edison Co.—Portland | Combustion Turbine No. 4 | 034 | 6 | 0.53 |
| Northampton | Northampton Generating Company | Boiler | 001 | 209 | 0.10 |
| Northampton | PP&L—Martins Creek | Foster-Wheeler Unit No. 1 | 031 | 492 | 1.01 |
| Northampton | PP&L—Martins Creek | Foster-Wheeler Unit No. 2 | 032 | 459 | 0.91 |
| Northampton | PP&L—Martins Creek | C-E Unit No. 3 | 033 | 835 | 0.51 |
| Northampton | PP&L—Martins Creek | C-E Unit No. 4 | 034 | 739 | 0.51 |
| Northampton | PP&L—Martins Creek | No. 4b Auxiliary Boiler | 036 | 0 | 0.17 |
| Northampton | PP&L—Martins Creek | Combustion Turbine No. 1 | 037 | 3 | 0.02 |
| Northampton | PP&L—Martins Creek | Combustion Turbine No. 2 | 038 | 3 | 0.02 |
| Northampton | PP&L—Martins Creek | Combustion Turbine No. 3 | 039 | 3 | 0.02 |
| Northampton | PP&L—Martins Creek | Combustion Turbine No. 4 | 040 | 3 | 0.02 |
| Northumber- land | Foster Wheeler Mt. Carmel Cogen | Cogen | 031 | 195 | 0.10 |
| Philadelphia | Allied Signal | 052 | 54 | 0.46 | |
| Philadelphia | PECO Energy—Richmond | Unit 91 | 037 | 28 | 0.60 |
| Philadelphia | PECO Energy—Richmond | Unit 92 | 038 | 37 | 0.60 |
| Philadelphia | PECO Energy—Delaware | No. 71 Boiler | 013 | 112 | 0.45 |
| Philadelphia | PECO Energy—Delaware | No. 81 Boiler | 014 | 130 | 0.45 |
| Philadelphia | PECO Energy—Delaware | No. 9 Gas Turbine | 018 | 2 | 0.67 |
| Philadelphia | PECO Energy—Schuylkill | No. 1 Boiler | 003 | 175 | 0.28 |
| Philadelphia | PECO Energy—Schuylkill | No. 11 Gas Turbine | 008 | 0 | 0.67 |
| Philadelphia | Trigen Energy Co— Sansom | 001 | 31 | 0.45 | |
| Philadelphia | Trigen Energy Co— Sansom | 002 | 27 | 0.45 | |
| Philadelphia | Trigen Energy Co— Sansom | 003 | 12 | 0.45 | |
| Philadelphia | Trigen Energy Co— Sansom | 004 | 15 | 0.45 | |
| Philadelphia | Trigen Energy Co— Schuylkill | 001 | 0 | 0.28 | |
| Philadelphia | Trigen Energy Co— Schuylkill | 002 | 0 | 0.28 | |
| Philadelphia | Trigen Energy Co— Schuylkill | 005 | 0 | 0.45 | |
| Philadelphia | U. S. Naval Base | 098 | 1 | 0.14 | |
| Philadelphia | U. S. Naval Base | 099 | 1 | 0.14 | |
| Philadelphia | Sun Oil—Girard Point | GP Boiler 37 | 02-2,3 | 87 | 0.33 |
| Philadelphia | Sun Oil—Girard Point | GP Boiler 38 | 02-4,5 | 87 | 0.33 |
| Philadelphia | Sun Oil—Girard Point | GP Boiler 39 | 02-6,7 | 87 | 0.33 |
| Philadelphia | Sun Oil—Girard Point | GP Boiler 40 | 02-8,9 | 116 | 0.33 |
| Philadelphia | Sun Oil—Girard Point | GP F-1 | 002-2, 3,4 | 91 | 0.27 |
| Philadelphia | Sun Oil—Point Breeze | PB 3H-1 | 19/20 | 43 | 0.15 |
| Philadelphia | Grays Ferry Project | Combustion Turbine | 125 | ||
| Philadelphia | Grays Ferry Project | Heat Recovery Steam Gen | 21 | ||
| Philadelphia | Grays Ferry Project | Boiler 25 | 80 | ||
| Schuylkill | Gilberton Power Company | Boiler | 333 | 0.17 | |
| Schuylkill | Northeastern Power Company | CFB Boiler | 201 | 0.06 | |
| Schuylkill | Schuylkill Energy Resources | Boiler | 031 | 348 | 0.20 |
| Schuylkill | Westwood Energy Properties | Boiler | 134 | 0.17 | |
| Schuylkill | Wheelabrator Frackville Energy Co | Boiler | 203 | 0.14 | |
| Schuylkill | PP&L—Fishback | CT 1 | 2 | 0.49 | |
| Schuylkill | PP&L—Fishback | CT 2 | 2 | 0.49 | |
| Snyder | PP&L—Sunbury | Sunbury SES Unit 1a | 031 | 294 | 0.98 |
| Snyder | PP&L—Sunbury | Sunbury SES Unit 1b | 032 | 294 | 0.98 |
| Snyder | PP&L—Sunbury | Sunbury SES Unit 2a | 033 | 294 | 0.83 |
| Snyder | PP&L—Sunbury | Sunbury SES Boiler 2b | 034 | 294 | 0.83 |
| Snyder | PP&L—Sunbury | Sunbury SES Unit No. 3 | 035 | 679 | 0.93 |
| Snyder | PP&L—Sunbury | Sunbury SES Unit No. 4 | 036 | 821 | 0.99 |
| Snyder | PP&L—Sunbury | Combustion Turbine 1 | 039 | 3 | 0.49 |
| Snyder | PP&L—Sunbury | Combustion Turbine 2 | 040 | 3 | 0.49 |
| Tioga | Penelec—Tioga | 031 | 3 | 0.48 | |
| Venango | Scrubgrass Power Plant | Unit 1 | 031 | 181 | 0.14 |
| Venango | Scrubgrass Power Plant | Unit 2 | 032 | 178 | 0.15 |
| Warren | Penelec—Warren | Boiler No. 1 | 031 | 76 | 0.62 |
| Warren | Penelec—Warren | Boiler No. 2 | 032 | 73 | 0.64 |
| Warren | Penelec—Warren | Boiler No. 3 | 033 | 77 | 0.61 |
| Warren | Penelec—Warren | Boiler No. 4 | 034 | 80 | 0.61 |
| Warren | Penelec—Warren | 001 | 10 | 0.69 | |
| Washington | Duquesne Light Co.— Elrama | No. 1 Boiler | 031 | 333 | 0.87 |
| Washington | Duquesne Light Co.— Elrama | No. 2 Boiler | 032 | 332 | 0.90 |
| Washington | Duquesne Light Co.— Elrama | No. 3 Boiler | 033 | 445 | 0.87 |
| Washington | Duquesne Light Co.— Elrama | No. 4 Boiler | 034 | 1,013 | 0.89 |
| Washington | West Penn Power Co.— Mitchell | Combustion Eng Coal Unit | 034 | 929 | 0.72 |
| Wayne | Penelec—Wayne | 031 | 11 | 0.84 | |
| Wyoming | Procter & Gamble Paper Products Co. | Westinghouse 251B10 | 035 | 245 | 0.68 |
| York | Glatfelter, P.H. Co. | Number 4 Power Boiler | 034 | 127 | 0.80 |
| York | Glatfelter, P.H. Co. | Number 1 Power Boiler | 035 | 85 | 0.80 |
| York | Glatfelter, P.H. Co. | Number 5 Power Boiler | 036 | 237 | 0.29 |
| York | Met Edison Tolna | 031 | 4 | 0.59 | |
| York | Met Edison Tolna | 032 | 4 | 0.59 | |
| York | PP&L—Brunner Island | Brunner Island 2 | 032 | 1,470 | 0.69 |
| York | PP&L—Brunner Island | Brunner Island Unit 1 | 931 | 1,290 | 0.67 |
| York | PP&L—Brunner Island | Brunner Island Unit 3 | 933 | 2,906 | 0.78 |
The provisions of this Appendix E adopted October 31, 1997, effective November 1, 1997, 27 Pa.B. 5683; amended March 10, 2000, effective March 11, 2000, 30 Pa.B. 1370. Immediately preceding text appears at serial pages (237287) to (237300).
Editor’s Note: In PPL Generation, LLC v. Com., Department of Environmental Protection, 986 A.2d 48 (Supreme 2009), the Pennsylvania Supreme Court declared 25 Pa. Code § § 123.201—123.215 (the ‘‘PA Mercury Rule’’) invalid.