### DEPT. OF ENVIRONMENTAL CONSERVATION 

### OFFICE OFTHE COMMISSIONER BEANPARNELL, GOVERNOR 410 WilloughbyAvenue, Suite 303 Post Office Box 111800 Juneau, Alaska 99811-1800 Phone: 907-465-5066 Fax: 907-465-5070 www.dec.state.ak.us



### Mr. Dennis McLerran U.S. EPA, Region 10 RegionalAdministrator's Office, RA-140 1200 SixthAvenue, Suite 900 Seattle, WA 98101 OFFICE OF THE EXECUTIVE 

### Dear Mr. McLerran: The Alaska Department ofEnvironmental Conservation (ADEC) hereby submits a revision to our State Implementation Plan (SIP) and requests EPA approval ofthe submission in accordance with 40 C.F.R. 51. The revisions to 18 ACC 50 which constitute the SIPrevision included the following changes:

• update adoption by reference dates offederal rules adopted in 18 AAC 50.040 and 18 AAC 50.990; • update adoption by reference ofrevised Standard Conditions for air permits in 18AAC 50.346; • add a new Standard Condition for air permits and associated form in 18 AAC 50.346; • update the airquality nonattainment designations in 18 AAC 50.015; • adopt clarifications to existingregulations to fix typos, to correct crossreferences, and resolve internal regulation conflicts in 18 AAC 50.302, 18 AAC 50.502, 18 AAC 50.508, 18AAC 50.540, 18 AAC 50.542, 18 AAC 50.544, and 18 AAC 50.990; and • make additional changes necessary to clarify the regulations in: 18 AAC 50.055, 18 AAC 225, 18 AAC 50.306, 18 AAC 50.502, 18 AAC 50.508, 18 AAC 50.510, 18 AAC 50.540, 18 AAC 50.542, and 18 AAC 50.544. Please note that the attached final regulations differ in some respects from the version submitted on October 25,2010, for parallelprocessingunder 40 C.F.R. 51, AppendixV 2.3. Although the intent ofthe regulations remained the same, the Alaska DepartmentofLaw required some wording changes for the final regulations. Please use the final regulations enclosed with this letter to complete parallel processingour adoption ofthe greenhouse gas tailoring rule and prevention of significantdeterioration (PSD) permitting changes. We are providing three paper copies and one electronic version ofthe following documents to Mr. Scott Hedges, ofyour staff:**~r.** Dennis Mclerran 2 November 19, 2010

SIP Revision: • AlaskaAdministrative Code, Title 18, Chapter 50 Air Quality Control with an effective date ofDecember 9,2010, published in Register 196, January 2011; and • ADEC documents adopted by reference (standard conditions, adoption date of September 27,2010) in the November 2, 2010, regulation revision. Supporting Documentation: • Signed & Certified Adoption Order and Filing Certificate for Permanent Regulations, filed November 9, 2010, with an effective date ofDecember 9, 2010; • Notice ofPublic Comment, signed June 25, 2010; • Affidavits ofPublication for the Public Notice (datedJune 28 orJune 29, 2010), signedJuly 7, 2010, June 30, 2010, andJune 29, 2010; • Affidavit ofAgency Record ofPublic Comment, signed September 27, 2010; • Mfidavit ofOral Hearing (datedJuly 29, 2010), signedJuly 29,2010; • Affidavit ofNotice ofProposedAdoption ofRegulations and Furnishing of Additional Information, signed September 27,2010; and • Public Review Draft ofproposed changes to 18 AAC 50 showing changes with new language indicated by bold lettering and old language shown in brackets, dated June 25, 2010. Please have your staffcontact Ms. Rebecca Smith ifthey have any questions or need additional assistance with this submittal. She can be reached at (907) 465-5121 or at rebecca.smith@alaska.gov

. Thankyou for your consideration ofour SIP revision submittal, and we look forward toyour approval ofthe package. Sincerely,

# ~~ Larry Hartig Commissioner

cc: Rick Albright, EPA Region 10 (w/o enclosures) Mahbubul Islam, EPA Region 10 (w/o enclosures) Scott Hedges, EPA Region 10 (wi enclosures) David Bray, EPA Region 10 (w/o enclosures) Gina Bonifacino, EPA Region 10 (w/o enclosures) Alice Edwards, Division ofAir Quality, ADEC (wi0 enclosures) John Kuterbach, Air Permits Program, Division ofAir Quality, ADEC (wi0 enclosures)

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