The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision formally submitted by the Delaware Department of Natural Resources and Environmental Control (DNREC). The revision provides Delaware's certification that its existing emissions statement program satisfies the emissions statement requirements of the Clean Air Act (CAA) for the 2015 ozone national ambient air quality standard (NAAQS). EPA is approving Delaware's emissions statement program certification for the 2015 ozone NAAQS as a SIP revision in accordance with the requirements of the Clean Air Act (CAA).