Approval and Promulgation of Air Quality Implementation Plans; Oklahoma; Regional Haze and Interstate Transport Affecting Visibility State Implementation Plan Revisions; Withdrawal of Federal Implementation Plan for American Electric Power/Public Service Company of Oklahoma

The Environmental Protection Agency (EPA) is taking final action to amend a Federal Implementation Plan (FIP) for Oklahoma that became effective on January 27, 2012, as it applies to Units 3 and 4 of the Northeastern Power Station in Rogers County, Oklahoma, which is operated by the American Electric Power/Public Service Company of Oklahoma (AEP/PSO). We are removing the FIP requirements for AEP/PSO because, in a separate action being published in today's Federal Register, we are taking final action to approve revisions to the Oklahoma State Implementation Plan (SIP), submitted by the Oklahoma Department of Environmental Quality (ODEQ) to EPA on June 20, 2013, which address revised Best Available Retrofit Technology (BART) requirements for sulfur dioxide (SO<INF>2</INF>) and oxides of nitrogen (NO<INF>X</INF>) for Units 3 and 4 of AEP/PSO's Northeastern Power Station in Rogers County, Oklahoma. The revisions (collectively, the "Oklahoma SIP revisions") also address the requirements of the Clean Air Act (CAA) concerning non-interference with programs to protect visibility in other states.