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 

February 10, 2014 

Mr. Shaun McGrath 

Regional Administrator 

USEPA Region 8 

1595 Wynkoop Street 

Denver, CO 80202-1129 

. \ "' 

Todd Parfitt, Director 

RECEIVED 

FEB 1 2 2014 

ECEJ-AT 

4-T'l :t:i 2) 3 

RE: State Implementation Plan Approval Request- Chapter 3, General Emission Standards, 

Section 2, Emission standards for particulate matter, and Section 9, 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 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 of emissions. In this revision, the State has addressed the treatment of excess 

emissions from stationary or portable diesel engines. 

ln addition to the revision to Section 2 of Chapter 3, the State is also asking to update Section 9, 

Incorporation by reference, to adopt by reference from the July 1, 2012 Code of Federal 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 or during the public hearing, the Environmental 

Quality Council approved the proposed revisions on September 12,2013. Pursuant to the Wyoming 

Administrative Procedures Act, the revisions were forwarded to the 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 .pdf format 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 revie\v: 

Herschler Building · 122 West 25th Street · Cheyenne, WY 82002 · http://deq.state.wy.us 

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Mr. Shaun McGrath 

February 10, 2014 

Page 2 

I. 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 necessary legal 

authority under State law to adopt and implement the revised 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 summary 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 3, General 

Emission Standards, Section 2, Emission standards for particulate matter, and the revision of Section 9, 

Incorporation by reference, of the Wyoming Air Quality Standards and Regulations as revised on 

November 22,2013. 

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

Air Quality Administrator, 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.