Draft 01-16-14 

 4:15 PM 

 For discussion purposes only. 

DRAFT 

Draft of SO2 Regulation 

.01 Definitions. 

A. In this chapter, the following terms have the meanings indicated. 

B. Terms Defined. 

(1) "Affected electric generating unit" means any one of the following coal-fired electric generating units: 

(a) Brandon Shores Units 1 and 2; 

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

(c) Chalk Point Units 1 and 2; 

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

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

(f) Morgantown Units 1 and 2; and 

(g) Warrior Run. 

(2) “By-pass stack operation” means any operation of an affected unit where a portion of the affected unit’s 

emissions pass through a duct, stack or conduit to the atmosphere that augments or substitutes for the principal stack 

exhaust system during any portion of the unit’s operation. 

 (3) “1-hour emission rate” means an arithmetic average of all the valid data for emission rates 

recorded from a continuous monitoring system on a 1- hour basis. 

.02 Applicability and General Requirements. 

A. Applicability. This chapter applies to the following coal-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) Warrior Run. 

B. General Requirements. 

(1) An affected electric generating unit shall comply with the 1-hour SO2 rate as provided in this regulation. 

(2) SO2 Emission Limitations. The following rate limits apply when the affected electric generating unit is 

operating in non-bypass stack operation. 

 

Affected Electric Generating Unit 1-Hour SO2 Rate 

lbs/hr 

Brandon Shores Unit 1 1000 

Brandon Shores Unit 2 1000 

C.P. Crane Unit 1 1400 

C.P. Crane Unit 2 1400 

Chalk Point Units 1 and 2 2400 

Dickerson Units 1, 2 and 3 1000 

H.A. Wagner Unit 2 500 

H.A. Wagner Unit 3 1000 

Morgantown Unit 1 1500 

Morgantown Unit 2 1500 

Warrior Run Under development 
(3)30-Day Averaging. MDE is considering provisions that would establish 30-day averaging that will still 

guarantee attainment with the 1-hour SO2 NAAQS. MDE understands there is research going on in this area. 

Comments on this issue are encouraged. 

(4) By-Pass Stack Operation. The following rate limits apply when the affected electric generating unit is operating 

in a by-pass stack operation mode. 

Affected Electric Generating Unit 1-Hour SO2 Rate 

lbs/hr 

Chalk Point Units 1 and 2 11,500 

Dickerson Units 1, 2 and 3 8,900 

Morgantown Units 1and 2 7,500 

(5) Alternative Emission Limits. MDE is considering a provision in the regulation that would establish limits in 

situations where there are multiple units on the same piece of property. Because of issues like different stack heights 

and exit velocities at different units, the alternative limits would have to be proposed by the facility and approved by 

MDE and included as a revision to the SIP. The alternative limits would need to be based on modeling that shows that 

they will comply with the 1-hour SO2 NAAQS. Comments on this issue are encouraged. 

.03 Monitoring and Reporting Requirements. 

A. Compliance Demonstration. 

(1) Compliance with the emission rate limitations in this chapter shall be demonstrated with a continuous 

emission monitoring system that is installed, operated, and certified in accordance with 40 CFR Part 75; and 

(2) Data reported to demonstrate compliance with the emission limits of regulation .03 of this chapter shall: 

(a) Not include data substituted using the missing data procedures in Subpart D of Part 75; and 

(b) Not be bias adjusted according to the procedure of Part 75. 

B. Quarterly Reports. 

(1) Beginning 30-days after the first quarter after the effective date of this regulation, each affected electric 

generating unit subject to the requirements of this chapter shall submit a quarterly report to the Department detailing 

the status of compliance with this regulation. 

(2) Each subsequent quarterly report shall be submitted to the Department not later than 30-days following the 

end of the calendar quarter. 

(3) Each quarterly report shall specify any exceedances of the SO2 emission rate limitations, the date, time and 

SO2 emissions of each exceedance, the reason for the exceedance, and any corrective action taken.