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(f) EPA approves as a revision to the District of Columbia State Implementation Plan the 2011 base year emissions inventory for the District of Columbia portion of the Washington, DC-MD-VA 2008 8-hour ozone nonattainment area submitted by the District Department of the Environment on July 17, 2014. The 2011 base year emissions inventory includes emissions estimates that cover the general source categories of point sources, non-road mobile sources, area sources, on-road mobile sources, and biogenic sources. The pollutants that comprise the inventory are nitrogen oxides (NOX) and volatile organic compounds (VOC).