Approval and Promulgation of Implementation Plans; Arkansas; Clean Air Interstate Rule Nitrogen Oxides Ozone Season Trading Program

EPA is taking a direct final action to approve a revision to the Arkansas State Implementation Plan (SIP) submitted on August 10, 2007, enacted at Regulation 19--Arkansas Plan of Implementation for Air Pollution Control; Chapter 14, Sections 19.1401-19.1404; and Chapter 15, Section 19.1501. This revision addresses the requirements of EPA's Clean Air Interstate Rule (CAIR) Nitrogen Oxides (NO<INF>X</INF>) Ozone Season Trading Program, promulgated on May 12, 2005 and subsequently revised on April 28 and December 13, 2006. EPA is approving the SIP revision as fully implementing the CAIR NO<INF>X</INF> ozone season requirements for Arkansas. Therefore, as a consequence of this SIP approval, EPA will also withdraw the CAIR Federal Implementation Plan (CAIR FIP) concerning NO<INF>X</INF> ozone season emissions for Arkansas. The CAIR FIPs for all States in the CAIR region were promulgated on April 28, 2006 and subsequently revised on December 13, 2006. The intended effect of this action is to reduce NO<INF>X</INF> emissions from the State of Arkansas that are contributing to nonattainment of the 8-hour ozone National Ambient Air Quality Standard (NAAQS or standard) in downwind states. This action is being taken under section 110 of the Federal Clean Air Act (the Act or CAA).