Approval and Promulgation of Implementation Plans; Oklahoma; General SIP Updates

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve revisions to the State Implementation Plan (SIP) for Oklahoma submitted by the State of Oklahoma designee with a letter dated February 14, 2017. The submittal covers updates to the Oklahoma SIP, as contained in annual SIP updates for 2013, 2014, 2015, and 2016, and incorporates the latest changes to EPA regulations. This action will address the revisions submitted to the Oklahoma SIP pertaining to incorporation by reference of federal requirements and emission inventory reporting requirements.