Department of Environmental Quality 

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

environment for the benefit of current and future generations. 

Matthew H. Mead, Governor John Corra, Director 

To: 

From: 

Honorable Matthew H. Mead, Governor ~~ 

John V. Corra, Director, Department of Environmental Quality \ \: ~ 

Subject: 

Date: 

Proposed Rules for Chapters I, 6 and 7 (R-21) - Greenhouse Gas Permitting 

Department of Environmental Quality, Air Quality Division 

July 13, 2012 

Priority: HIGH- Deadline for response is July 27, 2012 

Summary: Notice of Agency Rulemaking 

The Air Quality Division (Division) is proposing revisions to the Wyoming Air Quality Standards and 

Regulations (WAQS&R) to allow the State to permit sources of greenhouse gases. The following is a 

brief summary of the proposed rule changes: 

• Revisions were made to add the definition of"Greenhouse gases (GHGs)." 

• A new section was added to require the permitting of sources of greenhouse gases, exempt minor 

sources from greenhouse gas permitting, and provide several off ramps for greenhouse gas permitting. 

• The definition of "Major source" under the Wyoming Title V Program was modified to include a new 

applicability threshold for greenhouse gases. 

• A definition for "tpy C02 equivalent emissions (C02e)" was added which excludes biogenic 

emissions through July 21, 2014. 

• The PSD program was modified to allow for new construction permitting of greenhouse gases. 

Definitions for "Greenhouse gases (GHGs)," "emissions increase," and "tpy C02 equivalent 

emissions (C02e)'' with exclusions for biogenic sources, were added to the PSD program section. 

Applicability thresholds for several different types of permitting scenarios were also added. Changes 

were made to the PSD definition of''Major source" to avoid triggering applicability on minor sources. 

The proposed revisions are consistent with federal regulation but no more stringent, and comply with 

Senate File 0086. Chapter I, Sections 3 and 7, and Chapter 6, Sections 4 and 14 will involve changes to 

the State Implementation Plan (SIP), and should eventually replace the current Federal Implementation 

Plan for greenhouse gases. The Wyoming Air Quality Advisory Board recommended that these revisions 

be taken forward through the rulemaking process at a public meeting held in Casper, Wyoming on July 12, 

2012. 

Agency Contact Name: 

Agency Contact Phone: 

Agency Contact Email: 

Christine Anderson 

307-675-5624 

tina.anderson@wvo.gov 

Governor's Response Options (to be completed by Governor's Office): 

v Agency may proceed. 

____ Delay public comment and set up meeting with 

~ tkd~ 7-ti-12-

Signature: Governor's Counsel 

If no response has been received by the 1 dh working day, the agency will proceed with these rules. 

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