Department of Environmental Quality 

To protect, conserve and enhance the quality of Wyoming's 

environment for the benefit of current 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 Approval Request- Chapter 8, Nonattainment Area 

Regulations, Section 5, Ozone nonattainment emission inventory rule, and Section 

10, Incorporation by reference (R-22(b)) 

Dear Mr. McGrath: 

On September 12, 2013, the Environmental Quality Council of the Wyoming Department 

of Environmental Quality conducted a public hearing pursuant to 40 CFR 51.102 to consider the 

adoption of revisions and additions to the Wyoming Air Quality Standards and Regulations 

(W AQSR). Revisions affecting the State Implementation Plan (SIP) involve Chapter 8, 

Nonattainment Area Regulations, Section 5, Ozone nonattainment emission inventory rule, and 

Section 10, Incorporation by reference. Section 5 was previously the Incorporation by reference 

section. However, Chapter 8 was reorganized, thereby making Section 10 the Incorporation by 

reference section. The State is requesting a SIP revision to Section 5, and an update to adopt by 

reference to Section I 0. 

Chapter 8, Section 5, Ozone nonattainment emission inventory rule, is a new rule to 

establish requirements for the submittal of emission inventories from facilities or sources located 

in an ozone nonattainment area pursuant to the requirements of the Clean Air Act (CAA), 

Section 182. 

In addition to the revision of Section 5 of Chapter 8, the State is also asking to update 

Section 10, Incorporation by 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 an update to the December 21, 2012 revision. 

After reviewing comments received before or during the public hearing, the 

Environmental Quality Council approved the proposed revisions on September 12, 2013. 

Pursuant to the Wyoming Administrative Procedures Act, tl1e revisions were forwarded to the 

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Mr. Shaun McGrath 

July 1, 2014 

Page 2 

Governor's Office for approval and then transmitted to the Secretary of State's Office and 

became effective on November 22, 2013. 

Since all of the necessary State reviews and approvals have been secured, I am 

submitting one paper copy and one electronic copy (in.pdfformat on CD) of the revisions to the 

State Implementation Plan. The electronic copy is an exact duplicate of the paper copy. 

The following administrative materials are included in the plan submission and have been 

attached for your review: 

1. A copy of the stamped Certification Page by the Secretary of State indicating the 

effective date of the revisions. The Certification Page, which has been signed by the 

Governor and Director of the Department of Environmental Quality, documents the 

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regulations and also provides evidence, along with the attachments listed below, that 

Wyoming followed all of the procedural requirements of the State's laws and 

constitution in conducting and completing the adoption of the plan. The rules became 

effective November 22, 2013. 

2. A June 17, 2013 memorandum from Todd Parfitt, Director of the 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 of intent of legislative authority. 

4. A copy of the notices issued by the Air Quality Division for public hearings with a 

list of newspapers and dates of publication. 

5. A copy of the Statement of Principal Reasons that was adopted with the rules. 

6. A copy of the smnmary of comments and responses. 

7. A list of signatures of witnesses present at the September 12,2013 hearing as well as 

a copy of the agenda. 

8. Two copies of the 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 of the 

revised State Implementation Plan for the State of Wyoming to include the revision of Chapter 8, 

Nonattainment Area Regulations, Section 5, Ozone nonattainment emission inventory mle, and 

the revision of Section 10, Incorporation by reference, of the Wyoming Air Quality Standards 

and Regulations as revised on November 22, 2013. 
Mr. Shaun McGrath 

July I, 2014 

Page 3 

If you have any questions regarding this submittal, please feel free to contact Steven A. 

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, EPA Region 8 w/o enc.