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 proposing to approve 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). EPA is not proposing to approve the redesignation request for the District of Columbia (the District) for its portion of the Area; EPA will address the District's redesignation request for its portion of the Area in a separate rulemaking action. EPA is also proposing to approve, as a revision to the District's, Maryland's, and Virginia's state implementation plans (SIPs), the joint maintenance plan submitted by the District, Maryland, and Virginia. The joint maintenance plan demonstrates maintenance of the 2008 ozone NAAQS through 2030 in the Washington Area. Approval of a maintenance plan is among the CAA criteria for redesignation to attainment, as discussed in more detail in this notice. The Washington Area maintenance plan includes motor vehicle emissions budgets (MVEBs) for the 2008 ozone NAAQS for nitrogen oxides (NOX) and volatile organic compounds (VOCs), which are precursors to ozone. EPA has found the MVEBs adequate and is proposing to approve, as a SIP revision, these 2014, 2025, and 2030 NOX and VOC MVEBs for the Washington Area.