GOVERNMENT OF THE DISTRICT OF COLUMBIA 

District Department of the Environment 

June 19, 2015 

Shawn M. Garvin 

Regional Administrator 

U.S. Environmental Protection Agency 

Region Ill (Mail Code: 3 RAOO) 

1650 Arch Street 

Philadelphia, PA 19103-2029 

*** 

Subject: District of Columbia Rulemaking to Regulate the Interstate Transport of Nitrogen 

Oxides (NOx) Emissions from Non-Electric Generating Unit Sources and 

Revision of the District's State Implementation Plan (SIP) 

Dear Mr. Garvin: 

Pursuant to the authority set forth in sections 5 and 6(b) of the District of Columbia Air Pollution 

Control Act of 1984, effective March 15, 1985, as amended (D.C. Law 5-165; D.C. Official 

Code§§ 8-101.05 and 8-101.06(b) (2013 Repl.)); section 107(4) ofthe District Department of 

the Environment Establishment Act of2005, effective February 15, 2006 (D.C. Law 16-51; D.C. 

Official Code§§ 8-15 1.07( 4) and 8-151.10 (20 13 Repl.)); and Mayor's Order 2006-61, dated 

June 14, 2006, the District of Columbia (District) is hereby requesting approval of a revision to 

its State implementation Plan (SIP) submitted in accordance with the requirements of 40 C.F.R. 

Part 51. The District is requesting approval of this SIP revision to meet certain federal Clean Air 

Act requirements under section 110(a)(2)(D)(i)(I). The SIP revision is a final rulemaking action 

to regulate the interstate transport of emissions of nitrogen oxide (NOx) from non-electric 

generating unit (EGU) sources by amending Chapters 1 and I 0 of Title 20 (Environment) of the 

District of Columbia Municipal Regulations (DCMR). 

States with non-EGUs that participated in emissions trading under the NOx SIP Call or the Clean 

Air Interstate Rule are required to take regulatory action to continue to meet NOx SIP Call nonEGU emissions reduction obligations adopted in their SIPs. 40 C.F.R. § 51.121. The rulemaking 

action addresses this requirement by placing an emissions cap on applicable units at the District's 

one non-EGU during the ozone season. 

The proposed regulation was first published in the D.C. Register on July 22, 2011 (58 OCR 29; 

notice lD 1293415). A second proposed rulemaking was published in the D. C. Register on 

November 2 1,2014 (61 OCR 012013; notice ID 5191069). The rules became effective on 

March 8, 2015, the date of publication of the Notice of Final Rulemaking in the D. C. Register 

(62 OCR 005685; notice ID 5452775). 

Wrt. * * * ARrt.

WASHINGTON 

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OFT DEPARTMENT HI: -----------------------------------------------------oc 

ENVIRONMI:NT 1200 First St. NE, 5th Floor, Washington, DC 20002ltel: 202.535.2600 I web: ddoe.dc.gov 
The following are included with this SIP submittal package: 

• One paper copy of the Notice of Final Rulemaking (which includes DDOE's response to 

public comments); 

• Public hearing notice; 

• Hearing officer's certification; 

• One paper copy of comments submitted during public comment period; 

• One disk containing an electronic version ofthe SIP revision. The electronic version 

includes an exact duplicate of the paper copy of the SIP revision submittal. 

Should you have any questions or require additional information, please contact me at (202) 535-

2615, or Ms. Cecily Beall, Associate Director for the Air Quality Division, at (202) 535-2626. 

Sincerely, 

Dire~ 

Encl re 

cc: Diana Esher, Director, Air Protection Division, EPA Region 3 

Cecily Beall, Associate Director, Air Quality Division, DDOE 

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