# Department of Environmental Quality

To protect, conserve and enhance the quality of Wyoming's environment for the benefit ofcurrent and future generations. Matthew H. Mead, Governor February 10, 2014

Mr. Shaun McGrath Regional Administrator USEPA Region 8 1595 Wynkoop Street Denver, CO 80202-1129 . \ "'

Todd Parfitt, Director 

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# FEB 1 22014

ECEJ-AT 4-T'l 

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RE: StateImplementationPlan ApprovalRequest- Chapter3, GeneralEmission Standards, Section 2, Emission standardsfor particulate matter, and Section 9, Incorporation by reference (R-22(b)) Dear Mr. McGrath: On September 12, 2013, the Environmental Quality Council ofthe Wyoming Department of Environmental Quality conducted a public hearing pursuant to 40 CFR 51.102 to considerthe adoption of revisions and additions to the Wyoming Air Quality Standards and Regulations (WAQSR). Revisions affectingthe State Implementation Plan (SIP) involve Chapter 3, General Emission Standards, Section 2, Emission standards for particulate matter, and Section 9, Incorporation by reference. The State is requesting a SIP revision to Section 2(d). and an update to adopt by reference to Section 9. Chapter 3, Section 2, Emission standards for particulate matter, establishes limits on the quantity, rate or concentration ofemissions. In this revision, the State has addressed the treatment ofexcess emissions from stationary or portable diesel engines. ln addition to the revision to Section 2 ofChapter 3, the State is also asking to update Section 9, Incorporation by reference, to adopt byreference from the July 1, 2012 Code ofFederal Regulations. While Section 9 is not currently in the SIP, the State did submit SIP revisions to include that section on May 24, 2012 and February 13, 2013. This action requests an update to the May 24, 2012 and February 13,2013 revisions. After reviewing comments received before orduringthe public hearing, the Environmental Quality Council approved the proposed revisions on September 12,2013. Pursuantto the Wyoming Administrative Procedures Act, the revisions were forwarded to the Governor's Office for approval and then transmitted to the Secretary ofState's Office and became effective on November 22,2013. Since all ofthe necessary State reviews and approvals have been secured, I am submittingone papercopy and one electronic copy (in .pdfformat on CD) ofthe revisions to the State Implementation Plan. The electronic copy is an exact duplicate ofthe paper copy. The following administrative materials are included in the plan submission and have been attached for your revie\v:

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### Mr. Shaun McGrath February 10, 2014 Page 2 I. A copy ofthe stamped Certification Page by the Secretary ofState indicatingthe effective date ofthe revisions. The Certification Page, which has been signed bythe Governor and Director ofthe Department ofEnvironmental Quality, documents the necessary legal authority under State lawto adopt and implementthe revised regulations and also provides evidence, along with the attachments listed below, that Wyoming followed all ofthe procedural requirements ofthe State's laws and constitution in conducting and completing the adoption ofthe plan. The rules became effective November22, 2013. 2. A June 17,2013 memorandum from Todd Parfitt, Directorofthe Department of Environmental Quality, to the Governor's Office requesting approval to proceed with the rulemaking. 3. A September23, 2013 review from the Legislative Service Office, finding the revised regulations withinthe scope ofintent oflegislative authority. 4. A copy ofthe notices issued bythe Air Quality Division for public hearings with a list of newspapers and dates ofpublication. 5. A copy ofthe StatementofPrincipal Reasons that was adopted with the rules. 6. A copy ofthe summary ofcomments and responses. 7. A list ofsignatures ofwitnesses present at the September 12,2013 hearing as well as a copy ofthe agenda. 8. Two copies ofthe revised chapter, one copy showing where revisions were made in underline and strikeout and a second copy with all the revisions incorporated. With this submission I am asking for Environmental Protection Agency approval ofthe revised State Implementation Plan for the State ofWyomingto include the revision ofChapter 3, General Emission Standards, Section 2, Emission standards for particulate matter, and the revision ofSection 9, Incorporation by reference, ofthe Wyoming Air Quality Standards and Regulations as revised on November 22,2013. Ifyou have any questions regardingthis submittal, please feel free to contact Steven A. Dietrich, Air QualityAdministrator, at 307-777-7391. Sincerely,

# \G~~ Todd Parfitt Director Enclosures

cc: Steven A. Dietrich, Administrator, Air Quality Division w/o enc. Jeni Cederle, Air Quality Division w/enc. Carl Daly, EPA Region 8 w/o enc.