Title 26 DEPARTMENT OF THE ENVIRONMENT 

Subtitle 11 AIR QUALITY 

Chapter 27 Emission Limitations for Power Plants 

.02 Applicability and Exemptions. 

A. This chapter applies to the following fossil-fuel fired electric generating units: 

 (1) Brandon Shores Units 1 and 2; 

 (2) C.P. Crane Units 1 and 2; 

 (3) Chalk Point Units 1 and 2; 

 (4) Dickerson Units 1, 2, and 3; 

 (5) H.A. Wagner Units 2 and 3; 

 (6) Morgantown Units 1 and 2; and 

 (7) R. Paul Smith Units 3 and 4. 

B. Except as provided in Regulation .03B(7) of this chapter, compliance with this chapter may not be 

achieved by applying sulfur dioxide (SO2), oxides of nitrogen (NOx), or mercury allowances acquired under 

any state or federal emissions trading program. 

C. The R. Paul Smith facility is subject to the NOx limitation in Regulation .03B(8) and the SO2 limitation 

in Regulation .03C(3) of this chapter. 

.03 General Requirements. 

A. An electric generating unit subject to this chapter shall comply with the emission limitations for NOx, 

SO2, and mercury as provided in this regulation. 

B. NOx Emission Limitations. 

 (1) Except as provided in §E of this regulation, annual NOx emissions from each affected electric 

generating unit may not exceed the number of tons in §B(2) of this regulation. 

 (2) Annual Tonnage Limitations. 

Annual NOx Tonnage Limitations Beginning Affected Unit 

January 1, 2009 January 1, 2012 

Brandon Shores Unit 1 2,927 tons 2,414 tons 

Brandon Shores Unit 2 3,055 tons 2,519 tons 

1
C.P. Crane Unit 1 832 tons 686 tons 

C.P. Crane Unit 2 894 tons 737 tons 

Chalk Point Unit 1 1,415 tons 1,166 tons 

Chalk Point Unit 2 1,484 tons 1,223 tons 

Dickerson Unit 1 672 tons 554 tons 

Dickerson Unit 2 736 tons 607 tons 

Dickerson Unit 3 698 tons 575 tons 

H.A. Wagner Unit 2 673 tons 555 tons 

H.A. Wagner Unit 3 1,352 tons 1,115 tons 

Morgantown Unit 1 2,540 tons 2,094 tons 

Morgantown Unit 2 2,522 tons 2,079 tons 

Total 19,800 tons 16,324 tons 

 (3) Except as provided in §E of this regulation, ozone season NOx emissions from each affected 

electric generating unit may not exceed the number of tons in §B(4) of this regulation. 

 (4) Ozone Season Tonnage Limitations. 

Affected Unit Ozone Season NOx Tonnage 

Limitations Beginning May 1, 2009 

Brandon Shores Unit 1 1,363 tons 

Brandon Shores Unit 2 1,449 tons 

C.P. Crane Unit 1 345 tons 

C.P. Crane Unit 2 385 tons 

Chalk Point Unit 1 611 tons 

Chalk Point Unit 2 657 tons 

Dickerson Unit 1 311 tons 

Dickerson Unit 2 333 tons 

Dickerson Unit 3 314 tons 

H.A. Wagner Unit 2 278 tons 

H.A. Wagner Unit 3 583 tons 

Morgantown Unit 1 1,053 tons 

Morgantown Unit 2 1,048 tons 

Total 8,730 tons 

 (5) Except as provided in §§B(7) and E of this regulation, if after reviewing 2009 ozone season 

measured ozone levels at air monitoring stations located in Maryland, the Department determines that 

ozone levels in Maryland exceed the levels required to meet the National Ambient Air Quality Standard for 

2
ozone, commencing on May 1, 2012, ozone season NOx emissions from each affected electric generating 

unit may not exceed the number of tons in §B(6) of this regulation. 

 (6) Ozone Season Tonnage Limitations. 

Affected Unit Ozone Season NOx Tonnage 

Limitations Beginning May 1, 2012 

Brandon Shores Unit 1 1,124 tons 

Brandon Shores Unit 2 1,195 tons 

C.P. Crane Unit 1 284 tons 

C.P. Crane Unit 2 317 tons 

Chalk Point Unit 1 503 tons 

Chalk Point Unit 2 542 tons 

Dickerson Unit 1 257 tons 

Dickerson Unit 2 274 tons 

Dickerson Unit 3 259 tons 

H.A. Wagner Unit 2 229 tons 

H.A. Wagner Unit 3 481 tons 

Morgantown Unit 1 868 tons 

Morgantown Unit 2 864 tons 

Total 7,197 tons 

 (7) Electric System Reliability During Ozone Seasons. 

 (a) An exceedance of the NOx limitations in §B(4) or (6) of this regulation which occurs 

because PJM Interconnection, LLC or a successor independent system operator, acts to invoke "Maximum 

Emergency Generation", "Load Reduction", "Voltage Reduction", "Curtailment of Non-essential Building 

Load", or "Manual Load Dump" procedures in accordance with the current PJM Manual, or a PJM alert 

preceding such action as to a generating unit that has temporarily shut down in order to avoid potential 

interruption in electric service and maintain electric system reliability is not a violation of this chapter 

provided that: 

 (i) Within 36 hours following the action, the owner or operator of the affected 

electric generating unit or units notifies the Manager of the Air Quality Compliance Program of the action 

taken by PJM Interconnection and provides the Department with documentation of the action which is 

satisfactory to the Department; 

 (ii) Within 48 hours after completion of the action, the owner or operator of the 

affected unit or units provides the Department with the estimated NOx emissions in excess of the emission 

limitation; and 

 (iii) Not later than December 31 of the year in which the emission limitation is 

exceeded, the owner or operator of the affected generating unit or units transfers to the Maryland 

Environmental Surrender Account, ozone season NOx allowances equivalent in number to the tons of NOx

emitted in excess of the emission limitation in §B(4) or (6), as applicable. 

3
 (b) The owner or operator of an electric generating unit or system, as applicable, shall 

send written notice to the Manager of the Air Quality Compliance Program not later than 5 business days 

following the day when the cumulative ozone season NOx emissions of an electric generating unit or 

system, as applicable, are: 

 (i) Equal to approximately 80 percent of the applicable ozone season emission 

limitation; and 

 (ii) Equal to the applicable ozone season emission limitation. 

 (8) Emissions from the R. Paul Smith facility may not exceed: 

 (a) An annual tonnage limitation of 1,390 tons of NOx beginning with the period January 

1, 2009 through December 31, 2009; and 

 (b) An ozone season tonnage limitation of 545 tons of NOx beginning with the ozone 

season May 1, 2009 through September 30, 2009. 

C. SO2 Emission Limitations. 

 (1) Except as provided in §E of this regulation, annual SO2 emissions from each affected electric 

generating unit may not exceed the number of tons in §C(2) of this regulation. 

 (2) Annual Tonnage Limitations. 

Annual SO2 Tonnage Limitations Beginning Affected Unit 

January 1, 2010 January 1, 2013 

Brandon Shores Unit 1 7,041 tons 5,392 tons 

Brandon Shores Unit 2 7,347 tons 5,627 tons 

C.P. Crane Unit 1 2,000 tons 1,532 tons 

C.P. Crane Unit 2 2,149 tons 1,646 tons 

Chalk Point Unit 1 3,403 tons 2,606 tons 

Chalk Point Unit 2 3,568 tons 2,733 tons 

Dickerson Unit 1 1,616 tons 1,238 tons 

Dickerson Unit 2 1,770 tons 1,355 tons 

Dickerson Unit 3 1,678 tons 1,285 tons 

H.A. Wagner Unit 2 1,618 tons 1,239 tons 

H.A. Wagner Unit 3 3,252 tons 2,490 tons 

Morgantown Unit 1 6,108 tons 4,678 tons 

Morgantown Unit 2 6,066 tons 4,646 tons 

Total 47,616 tons 36,467 tons 

 (3) Emissions from the R. Paul Smith facility may not exceed an annual tonnage limitation of 

4,590 tons of SO2 beginning with the period January 1, 2010 through December 31, 2010. 

4
D. Mercury Emission Limitations. 

 (1) For the 12-month period from January 1, 2010 through December 31, 2010 and ending with 

the 12-month period beginning December 1, 2012 through November 30, 2013, each affected facility shall 

meet a 12-month rolling average removal efficiency for mercury of at least 80 percent. 

 (2) For the 12 months beginning January 1, 2013 and thereafter, each affected facility shall meet a 

12-month rolling average removal efficiency for mercury of at least 90 percent. 

 (3) The mercury removal efficiency required in §D(1) and (2) of this regulation shall be 

determined in accordance with Regulation .04 of this chapter. 

 (4) The R. P. Smith facility shall meet the mercury requirements in §D(1)—(3) of this regulation. 

E. System-Wide Compliance Determinations. 

 (1) Compliance with the emission limitations in §§B and C of this regulation may be achieved by 

demonstrating that the total number of tons emitted from all electric generating units in a system does not 

exceed the sum of the tonnage limitations for all electric generating units in that system. 

 (2) A system-wide compliance determination shall be based only upon emissions from units in 

Maryland that are subject to the emission limitations in §§B and C of this regulation. 

 (3) If a unit that is part of a system is transferred to a different person that does not own, operate, 

lease, or control an affected unit subject to this chapter, the transferred unit shall meet the limitations in 

§§B and C of this regulation applicable to that electric generating unit. 

5