PAUL R . LEPAGE GOVERNOR

June 13, 2012 David Conroy, Chief Air Programs Branch U .S. EPA Region I 1 Congress St., Suite 1100 Boston, Ma. 02114-2023 RE: Required SIP Elements Under Section 110(a)(1) and (2) for the 1997 PM2

.5 NAAQS Dear Mr . Conroy: PATRICIA W . AHO COMMISSIONER

On January 3, 2008, the Maine Department of Environmental Protection (DEP) submitted an Infrastructure State Implementation Plan (SIP) to the U .S. Environmental ProtectionAgency (EPA) demonstrating that Maine is in compliance with the procedural, timing and infrastructure requirements contained in section 110(a)(1) and (2) of the 1990 Clean Air Act Amendments (CAA) as required for the 1997 PM2 .5 national ambient air quality standards. Since that time, it has come to the Department's attention that the Maine submittal did not fully address all section 110(a)(2) requirements. The Maine submittal did not include some elements required under section 110(a)(2)(D) related to Federal prevention ofsignificant deterioration (PSD) requirements for PM2 .5 and greenhouse gases (GHG) . The elements that were only partially addressed include: section 110(a)(2)(C) ; section 110(a)(2)(D)(i)(II) ; 110(a)(2)(D)(ii) ; and section 110(a)(2)(J) . Maine is hereby committing to adopt and submit the necessary regulationrevisions to EPAfor each ofthe aforementioned section 110(a)(2) elements forboth the 1997 and 2006 PM2.5 NAAQS by a date that is no later than one year fromthe conditional approval of Maine's PM2 .5 Infrastructure SIP. Recognizing that EPAwithdrew its previous approval Maine's PSDprograms to the extent they apply PSDto Greenhouse Gas emitting sources below the thresholds in the final Tailoring Rule (75 FR31,514)1, Maine is also requesting that EPAtherefore consider only the narrowed PM2.5 PSDprogram

in its review

ofthis Maine Infrastructure SIP submittal The section 110(a)(2)(G) Emergency Power requirements were also inadequately addressed, since the Department had not updated its Chapter 109Emergency Episodes Regulations to I Thereby "narrowing" the scope of the GHGPSDprogram . AUGUSTA 17 STATE HOUSE STATION AUGUSTA, MAINE 04333-0017 (207) 287-7688 FAX

: (207) 287-7826 RAY BLDG., HOSPITAL ST. STATE OF MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION

BANGOR PORTLAND PRESQUE ISLE 106 HOGAN ROAD, SUITE G 312 CANCO ROAD 1235 CENTRAL DRIVE, SKYWAY PARK BANGOR, MAINE 04401 PORTLAND, MAINE 04103 PRESQUE ISLE, MAINE 04769-2094 (207) 941-4570 FAX: (207) 941-4584 (207) 822-6300 FAX: (207) 822-6303 (207) 764-0477 FAX: (207) 760-3143 web site: www

.maine .gov/depLetter to David Conroy

6/13/12 Page 2 of2 include the new

PM2 .5 NAAQSand action levels. The Department has since drafted proposed amendments to its Chapter 109 that will fully address the section 110(a)(2)(G) requirements, and is scheduled to formally propose the amendments on August 1, 2012. Maine is therefore committing to adopt and submit therevised Emergency Episodes Regulations to EPAby a date that is no later than oneyear fromthe conditional approval of Maine's PM2 .5 Infrastructure SIP Finally, with respect to section 110(a)(2)(E)- Adequate Resources, the Department is committing to submit statutory provisions pertaining to conflict of interest to EPAfor incorporation into the Maine by a date that is no later than oneyear fromthe conditional approval of Maine's PM2 .5 Infrastructure SIP. Thank you for your attention to this matter, and ifyou should have any questions, please contact Jeff Crawford at (207) 287-7647. Sincerely,

# 4W4-11~YFMelanie Loyzim, Director Bureau ofAir Quality Cc: Anne Arnold, EPA Heather Parent, DEP Jeff Crawford, DEP