Approval and Promulgation of Air Quality Implementation Plans; Oklahoma

Under the Federal Clean Air Act (CAA or Act) the Environmental Protection Agency (EPA) is approving revisions to the Oklahoma State Implementation Plan (SIP) submitted by the State of Oklahoma designee. The revisions are administrative in nature and modify redundant or erroneous text within the SIP. The revisions also incorporate new definitions and the current national ambient air quality standards (NAAQS) for four criteria pollutants; delete a subchapter that addresses motor vehicle pollution control devices; and add requirements for certain incinerators.