Air Plan Approval; District of Columbia, Maryland, and Virginia; Maryland and Virginia Redesignation Requests and District of Columbia, Maryland, and Virginia Maintenance Plan for the Washington, DC-MD-VA 2008 Ozone Standard Nonattainment Area

The Environmental Protection Agency (EPA) is approving the requests from the State of Maryland (Maryland) and the Commonwealth of Virginia (Virginia) to redesignate to attainment their respective portions of the Washington, DC-MD-VA nonattainment area (hereafter "the Washington Area" or "the Area") for the 2008 8-hour ozone national ambient air quality standard (NAAQS or standard) (also referred to as the 2008 ozone NAAQS) as Maryland's and Virginia's portions of the Area meet the statutory requirements for redesignation under the Clean Air Act (CAA). EPA is therefore redesignating the following jurisdictions to attainment for the 2008 ozone NAAQS: The Counties of Calvert, Charles, Frederick, Montgomery, and Prince George's in Maryland as well as the Counties of Arlington, Fairfax, Loudoun, and Prince William and the Cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park in Virginia. EPA is also approving, as a revision to District of Columbia's (the District), Maryland's, and Virginia's state implementation plans (SIPs), the joint Washington Area maintenance plan submitted by the District, Maryland, and Virginia, which demonstrates maintenance of the 2008 ozone NAAQS through 2030 in the Washington Area. The Washington Area maintenance plan includes motor vehicle emissions budgets (MVEBs) for the 2008 ozone NAAQS for nitrogen oxides (NO<INF>X</INF>) and volatile organic compounds (VOCs), which are precursors to ozone. EPA has found the MVEBs adequate and is approving, as a SIP revision, these 2014, 2025, and 2030 NO<INF>X</INF> and VOC MVEBs for the Washington Area.