EPA is approving revisions to the Ohio State Implementation Plan (SIP) under the Clean Air Act (CAA). On September 7, 2006, Ohio requested approval of revisions to its open burning standards. In order to clarify the open burning rules, Ohio added requirements for specific types of burning that were previously not addressed. The state also added or refined some of the definitions and slightly changed some of the existing rules. The revisions were made to increase clarity of Ohio's open burning rules. EPA finds that the revisions are consistent with the CAA.