Approval and Promulgation of Air Quality Implementation Plans; District of Columbia, Maryland, and Virginia; Attainment Demonstration for the 1997 8-Hour Ozone National Ambient Air Quality Standard for the Washington, DC-MD-VA Moderate Nonattainment Area

The Environmental Protection Agency (EPA) is approving the attainment demonstration and associated contingency measures and motor vehicle emission budgets (MVEBs) for the Washington, DC-MD-VA, moderate ozone nonattainment area (Washington Area) for the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS) as submitted by the District of Columbia, the State of Maryland, and the Commonwealth of Virginia as revisions to each of their State Implementation Plans (SIPs). EPA has determined that each of the three SIP revisions including specifically the attainment demonstration, contingency measures and MVEBs meet the applicable requirements of the Clean Air Act (CAA or Act), and EPA is approving each revision.