On June 24, 2011, Ohio Environmental Protection Agency (Ohio EPA) submitted for Clean Air Act (CAA) State Implementation Plan (SIP) approval, revisions to Ohio Administrative Code (OAC) rules: 3745-18- 01, 3745-18-03 to 3745-18-52, 3745-18-54 to 3745-18-77, 3745-18-79, 3745-18-81 to 3745-18-89, and 3745-18-91 to 3745-18-94. The rule revisions primarily update facility information and remove SO<INF>2</INF> requirements for shutdown facilities throughout the SIP. EPA believes that the revisions improve the clarity of the rule without affecting the stringency and therefore is approving all of the submitted revisions except for specific paragraphs in OAC 3745-18-04.