# 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 July I, 2014

Mr. Shaun McGrath Regional Administrator USEP A Region 8 1595 Wynkoop Street Denver, CO 80202-1129 Todd Paliitt, Director

RE: State Implementation Plan ApprovalRequest- Chapter 8, Nonattainment Area Regulations, Section 5, Ozone nonattainment emission inventory rule, and Section 10, Incorporation by reference (R-22(b)) DearMr. McGrath: On September 12, 2013, the Environmental Quality Council ofthe Wyoming Department ofEnvironmental Quality conducted a public hearing pursuantto 40 CFR 51.102 to consider the adoption ofrevisions and additions to the Wyoming Air Quality Standards and Regulations (WAQSR). Revisions affecting the State Implementation Plan (SIP) involve Chapter 8, Nonattainment AreaRegulations, Section 5, Ozone nonattainment emission inventory rule, and Section 10, Incorporationbyreference. Section 5 was previously the Incorporationby reference section. However, Chapter 8 was reorganized, thereby making Section 10 the Incorporationby reference section. The State is requesting a SIP revision to Section 5, and an update to adoptby reference to Section I0. Chapter 8, Section 5, Ozone nonattainment emission inventory rule, is a newrule to establish requirements for the submittal ofemission inventories from facilities or sources located in an ozone nonattainment area pursuantto the requirements ofthe Clean Air Act (CAA), Section 182. In addition to the revision ofSection 5 ofChapter 8, the State is also asking to update Section 10, Incorporationby reference, to adopt by reference from the July 1, 2012 Code of Federal Regulations. While Section 10 is not currently in the SIP, the State did submit SIP revisions to include that section (previously Section 5) on December 21, 2012. This action requests anupdate to the December 21, 2012 revision. After reviewing commentsreceived before or during the publichearing, the Environmental Quality Council approved the proposedrevisions on September 12, 2013. Pursuantto the Wyoming Administrative Procedures Act, tl1e revisions were forwarded to the

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### Mr. ShaunMcGrath July 1, 2014 Page 2 Governor's Office for approval and then transmittedto 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 submitting one paper copy 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 andhave been attached for your review: 1. A copy ofthe stamped Certification Page by the Secretary ofState indicatingthe effective date ofthe revisions. The Certification Page, which has been signed by the Governor and Director ofthe Department ofEnvironmental Quality, documents the**--n~G~ssar-yl~gal-auth<Jrit-y-under-Stat~-law-t<J-ad<Jpt-and-impl~m@t-the-nwis<:ld~~­** 

### regulations and also provides evidence, along withthe 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 effectiveNovember 22, 2013. 2. A June 17, 2013 memorandum from Todd Parfitt, Director ofthe Department of Environmental Quality, to the Governor's Office requesting approval to proceed with the rulemaking. 3. A September 23, 2013 review from the Legislative Service Office, finding the revised regulations within the scope ofintent oflegislative authority. 4. A copy ofthe notices issued by the Air Quality Division for public hearings with a list ofnewspapers and dates ofpublication. 5. A copy ofthe Statement ofPrincipal Reasons that was adopted with the rules. 6. A copy ofthe smnmary 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 ofWyoming to include the revision ofChapter 8, Nonattainment Area Regulations, Section 5, Ozone nonattainment emission inventory mle, and the revision ofSection 10, Incorporation by reference, ofthe Wyoming Air Quality Standards and Regulations as revised on November 22, 2013.Mr. ShaunMcGrath July I, 2014 Page 3 Ifyou have any questions regarding this submittal, please feel free to contact StevenA. Dietrich, Air Quality Administrator, at 307-777-7391. Sincerely,

Todd Parfitt Director Enclosures
cc: Steven A. Dietrich, Administrator, Air Quality Division w/o enc.**~J**eni-G:ederle,-Air-Quality-Division-w/enc,-------. ------- Carl Daly, EPARegion 8 w/o enc.