The U.S. Environmental Protection Agency is approving, with an effective date of Jan. 11, the Wyoming State Implementation Plan (SIP) revisions submitted on Jan. 12, 2011, and April 19 that address regional haze, the agency said in a Dec. 12 Federal Register notice.
These SIP revisions were submitted by the state to address the requirements of the Clean Air Act (CAA) and EPA rules that require states to prevent any future and remedy any existing man-made impairment of visibility in mandatory Class I areas caused by emissions of air pollutants from numerous sources, including coal-fired power plants, located over a wide geographic area. States are required to assure reasonable progress toward the national goal of achieving natural visibility conditions in Class I areas.
In a lawsuit in the U.S. District Court for the District of Colorado, environmental groups sued EPA for its failure to take timely action with respect to the regional haze requirements of the CAA and its regulations for the state of Wyoming. The consent decree worked out to settle that lawsuit requires that EPA sign a notice of final rulemaking addressing the regional haze requirements for Wyoming by Nov. 14 “We are meeting that requirement with the signing of this notice of final rulemaking,” said the notice.
The notice of proposed rulemaking was published in the Federal Register on May 24. In that proposal, the agency proposed to approve Wyoming SIP revisions submitted in January 2011 and April 2012. As part of those revisions, the state submitted revisions to the Wyoming Air Quality Standards and Regulations (WAQSR). The state submitted WAQSR Chapter 14, Sections 2 and 3—Emission Trading Program Regulations. WAQSR Chapter 14, in conjunction with the SIP, implements the backstop trading program under federal regulations. EPA proposed to approve WAQSR Chapter 14, Section 2 and Section 3.
The State submitted another SIP revision dated Jan. 12, 2011, that addresses the requirements pertaining to best available retrofit technology (BART) for particulate matter (PM) and NOX and additional Class I areas, respectively. EPA proposed action on this SIP in a separate notice.