Approval and Promulgation of Implementation Plans; Wyoming; Revisions to the Air Quality Standards and Regulations

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EPA is approving changes to Wyoming's State Implementation Plan (SIP). On February 10, 2014, the Wyoming Department of Environmental Quality (WDEQ) submitted to EPA revisions to the Wyoming SIP. These revisions included the removal of an exemption from Wyoming Air Quality Standards and Regulations (WAQSR) Chapter 3, section 2(d). In this action, EPA is approving the revision of this provision into the SIP because the revision is consistent with Clean Air Act (CAA) requirements. The revision will correct certain deficiencies related to the treatment of excess emissions from sources. EPA will address the remaining revisions from Wyoming's February 10, 2014 submission in a separate action.