Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; Oxygenated Gasoline Program

EPA is taking direct final action to approve a revision to the District of Columbia State Implementation Plan (SIP). The revision makes the oxygenated gasoline program a contingency measure for the District of Columbia (the District), which means that the oxygenated gasoline program would only be required to be implemented in the District if there is a violation of the carbon monoxide (CO) national ambient air quality standard (NAAQS). The District's revision also makes technical amendments to its oxygenated gasoline regulations which correct the deficiencies previously identified by EPA in a January 26, 1995 final rule granting limited approval/limited disapproval of those regulations. Therefore, the limited approval/limited disapproval is being converted to a full approval. EPA is approving this revision in accordance with the requirements of the Clean Air Act.