Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; 15 Percent Plan for the Metropolitan Washington, D.C. Ozone Nonattainment Area

We are converting our conditional approval of the District of Columbia's State Implementation Plan (SIP) revision to achieve a 15 percent reduction in volatile organic compound (VOC) emissions (15% plan) in the Metropolitan Washington, D.C. ozone nonattainment area to a full approval. In a rule published on July 7, 1998, we conditionally approved the District's 15% plan as a revision to the District's SIP. The sole condition we imposed for full approval was that the District begin mandatory testing of motor vehicles under its enhanced inspection and maintenance program (I/M program) on or before April 30, 1999. The District began the required testing on April 26, 1999, and thus fulfilled the condition for full approval. The District's 15% plan SIP revision meets all the requirements of the Clean Air Act relating to the plan to achieve a 15% reduction in VOC emissions.