Approval and Promulgation of Air Quality Implementation Plans; Rescission of Federal Implementation Plan; Wyoming; Prevention of Significant Deterioration; Greenhouse Gas Tailoring Rule Revisions

EPA is approving revisions and additions to the Wyoming State Implementation Plan (SIP) submitted by the Wyoming Department of Environmental Quality (WDEQ) to EPA on March 8, 2013. The SIP revision to the Wyoming Prevention of Significant Deterioration (PSD) program updates the program to regulate permitting of sources of greenhouse gases (GHGs). Specifically, we are approving revisions to Wyoming's Air Quality Standards and Regulations (WAQSR) Chapter 1, Common Provisions, Section 3, Definitions, and Chapter 6, Permitting Requirements, Section 4, Prevention of Significant Deterioration, and the addition of Chapter 1, Section 7, Greenhouse Gases. EPA is also rescinding the GHG PSD Federal Implementation Plan (FIP) for Wyoming that was put in place to ensure the availability of a permitting authority for GHG PSD permitting in Wyoming. EPA is taking this final action under section 110 and part C of the Clean Air Act (the Act or CAA).