### DEPT. OF ENVIRONMENTAL CONSERVATION
OFFICE OF THE COMMISSIONER

November 19, 2010
Mr. Dennis McLerran U.S. EPA, Region 10 Regional Administrator's Office, RA-140 1200 Sixth Avenue, Suite 900 Seattle, WA 98101

Dear Mr. McLerran:

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

• update adoption by reference dates of federal rules adopted in 18 AAC 50.040 and 18 AAC 50.990;

• update adoption by reference of revised Standard Conditions for air permits in 18 AAC 50.346;

• add a new Standard Condition for air permits and associated form in 18 AAC 50.346;

• update the air quality nonattainment designations in 18 AAC 50.015;

• adopt clarifications to existing regulations to fix typos, to correct crossreferences, and resolve internal regulation conflicts in 18 AAC 50.302, 18 AAC 50.502, 18 AAC 50.508, 18 AAC 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 parallel processing under 40 C.F.R. 51, Appendix V 2.3. Although the intent of the regulations remained the same, the Alaska Department of Law required some wording changes for the final regulations. Please use the final regulations enclosed with this letter to complete parallel processing our adoption of the greenhouse gas tailoring rule and prevention of significant deterioration (PSD) permitting changes.

We are providing three paper copies and one electronic version of the following documents to Mr. Scott Hedges, of your staff: SEAN PARNELL, GOVERNOR

410 Willoughby Avenue, Suite 303 Post Office Box 111800 Juneau, Alaska 99811-1800 Phone: 907-465-5066
Fax: 907-465-5070 www.dec.state.ak.usElin Miller 2 November 19, 2008

g :\comm\wp\2010\10.257 epa sip letter 112210.docx SIP Revision :

• Alaska Administrative Code, Title 18, Chapter 50 Air Quality Control with an effective date of December 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 of December 9, 2010;

• Notice of Public Comment, signed June 25, 2010;

• Affidavits of Publication for the Public Notice (dated June 28 or June 29, 2010), signed July 7, 2010, June 30, 2010, and June 29, 2010;

• Affidavit of Agency Record of Public Comment, signed September 27, 2010;

• Affidavit of Oral Hearing (dated July 29, 2010), signed July 29, 2010;

• Affidavit of Notice of Proposed Adoption of Regulations and Furnishing of Additional Information, signed September 27, 2010; and

• Public Review Draft of proposed 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 staff contact Ms. Rebecca Smith if they have any questions or need additional assistance with this submittal. She can be reached at (907) 465-5121 or at rebecca.smith@alaska.gov. Thank you for your consideration of our SIP revision submittal, and we look forward to your approval of the 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 (w/ enclosures) David Bray, EPA Region 10 (w/o enclosures) Gina Bonifacino, EPA Region 10 (w/o enclosures) Alice Edwards, Division of Air Quality, ADEC (w/o enclosures) John Kuterbach, Air Permits Program, Division of Air Quality, ADEC (w/o enclosures)