Approval and Promulgation of Implementation Plans; Oklahoma; Interstate Transport Requirements for the 2012 PM2.5

Pursuant to the Federal Clean Air Act (CAA or Act), the Environmental Protection Agency (EPA) is proposing to approve portions of the Oklahoma State Implementation Plan (SIP) submittal addressing the CAA requirement that SIPs address the potential for interstate transport of air pollution to significantly contribute to nonattainment or interfere with maintenance of the 2012 fine particulate matter (PM2.5) National Ambient Air Quality Standards (NAAQS) in other states. EPA is proposing to determine that emissions from Oklahoma sources do not contribute significantly to nonattainment in, or interfere with maintenance by, any other state with regard to the 2012 PM2.5 NAAQS.