Approval and Promulgation of Air Quality Implementation Plans; District of Columbia, Maryland, and Virginia; 2011 Base Year Emissions Inventories for the Washington DC-MD-VA Nonattainment Area for the 2008 Ozone National Ambient Air Quality Standard

The Environmental Protection Agency (EPA) is taking direct final action to approve the 2011 base year emissions inventories submitted by the District of Columbia, State of Maryland, and Commonwealth of Virginia (collectively, the States) for the 2008 8-hour ozone national ambient air quality standard (NAAQS). The emissions inventories were submitted to meet nonattainment requirements related to the Washington, DC-MD-VA nonattainment area (the DC Area or Area) for the 2008 8-hour ozone NAAQS. EPA is approving the 2011 base year emissions inventory for the 2008 8-hour ozone NAAQS for the DC Area in accordance with the requirements of the Clean Air Act (CAA).