# Department of Environmental Quality

To protect, consetve andenhance the quality ofWyoming's environmentforthe benefit ofcurrentand future generations.

Matthew H. Mead, Governor John Corra, Director
To: From: Honorable Matthew H. Mead, Governor

### ~~ John V. Corra, Director, Department ofEnvironmental Quality \ \:

## ~ Subject:

Date: Proposed Rules for Chapters I, 6 and 7 (R-21)

- Greenhouse Gas Permitting Department ofEnvironmental Quality, Air Quality Division July 13, 2012 Priority: HIGH- Deadline for response is July 27, 2012 Summary: Notice ofAgency Rulemaking The AirQuality Division (Division) is proposing revisions to the Wyoming Air Quality Standards and Regulations (WAQS&R) to allow the State to permit sources ofgreenhouse gases. The following is a briefsummary ofthe proposed rule changes:

• Revisions were made to add the definition of"Greenhouse gases (GHGs)." • Anew section was added to require the permitting ofsources ofgreenhouse gases, exempt minor sources from greenhouse gas permitting, and provide several offramps for greenhouse gas permitting. • The definition of"Major source" underthe Wyoming Title VProgram was modified to include anew applicability threshold for greenhouse gases. • Adefinition for "tpy C02 equivalentemissions (C02e)" was added which excludes biogenic emissions through July 21, 2014. • The PSD program was modified to allow for new construction permitting ofgreenhouse 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 ofpermitting 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 3and 7, and Chapter 6, Sections 4and 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 thatthese revisions be taken forward through the rulemaking process at a public meeting held in Casper, Wyoming on July 12, 2012. Agency ContactName: 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 receivedbythe 1

### dh workingday, the agency willproceedwith these rules.

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