Approval and Promulgation of Implementation Plans; Alaska; Interstate Transport of Pollution

EPA is approving the actions of the Alaska Department of Environmental Conservation (ADEC) to address the provisions of Clean Air Act section 110(a)(2)(D)(i) for the 8-hour ozone and PM2.5 National Ambient Air Quality Standards (NAAQS). These provisions require each state to submit a State Implementation Plan (SIP) revision that prohibits emissions that adversely affect another state's air quality through interstate transport. ADEC has adequately addressed the four distinct elements related to the impact of interstate transport of air pollutants for the state of Alaska. These include prohibiting emissions that contribute significantly to nonattainment of the NAAQS in another state, interfere with maintenance of the NAAQS by another state, interfere with plans in another state to prevent significant deterioration of air quality, or interfere with efforts of another state to protect visibility.