Air Plan Approval; Oklahoma; Interstate Transport Requirements for the 1997 Ozone National Ambient Air Quality Standards

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve a portion of an Oklahoma State Implementation Plan (SIP) submittal that pertains to the good neighbor provision requirements of the CAA with respect to interstate transport of air pollution which will interfere with maintenance of the 1997 ozone National Ambient Air Quality Standards (NAAQS). The good neighbor provision requires, in part, that each state, in its SIP, prohibit emissions that will interfere with maintenance of a new or revised NAAQS in another state. In this action, EPA is proposing to approve the Oklahoma SIP submittal as having met the interfere with maintenance requirement of the good neighbor provision for the 1997 ozone NAAQS in accordance with section 110 of the CAA. EPA is also withdrawing its October 17, 2011 proposed rule to disapprove this portion of Oklahoma SIP submittal.