Approval and Promulgation of Air Quality Implementation Plans; District of Columbia, Maryland, and Virginia; 2002 Base Year Emission Inventory, Reasonable Further Progress Plan, Contingency Measures, Reasonably Available Control Measures, and Transportation Conformity Budgets for the Washington, DC 1997 8-Hour Moderate Ozone Nonattainment Area

EPA is approving State Implementation Plan (SIP) revisions submitted by the District of Columbia, the State of Maryland, and the Commonwealth of Virginia (the States). These revisions pertain to the 2002 base year emissions inventory, the reasonable further progress (RFP) plan, RFP contingency measure, and reasonably available control measure (RACM) requirements of the Clean Air Act (CAA) for the Washington, DC-MD-VA moderate 1997 8-hour ozone nonattainment area (the Washington Area). EPA is also approving the 2008 transportation conformity motor vehicle emissions budgets (MVEBs) associated with this revision. EPA is approving the SIP revisions because they satisfy the emission inventory, RFP, RACM, RFP contingency measures, and transportation conformity requirements for areas classified as moderate nonattainment for the 1997 8-hour ozone national ambient air quality standard (NAAQS) and demonstrate further progress in reducing ozone precursors. This action is being taken under the CAA.