The Environmental Protection Agency is taking final action to revise regulations governing the production and import of class I ozone-depleting substances in the United States to indefinitely extend the global essential laboratory and analytical use exemption. This exemption currently expires on December 31, 2021, and this final action allows for continued production and import of class I substances in the United States solely for laboratory and analytical uses that have not been identified by the Environmental Protection Agency as nonessential.

The Environmental Protection Agency (EPA) is approving state implementation plan (SIP) revisions submitted by the State of Tennessee, through the Tennessee Department of Environment and Conservation (TDEC), through letters dated February 26, 2020. Specifically, EPA is approving the removal of Tennessee's motor vehicle inspection and maintenance (I/M) program requirements for Davidson, Sumner, Rutherford, Williamson and Wilson Counties in Tennessee (also known as the Middle Tennessee Area) and Hamilton County (also known as the Chattanooga Area), from the federally-approved SIP.

The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision formally submitted by the District of Columbia Department of Energy and the Environment (DOEE). The revision provides the District'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).

The Environmental Protection Agency (EPA) is taking final action to approve State Implementation Plan (SIP) submissions from Kansas and Nebraska addressing the Clean Air Act (CAA or Act) interstate transport SIP requirements for the 2010 Sulfur Dioxide (SO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS). These submissions address the requirement that each SIP contain adequate provisions prohibiting air emissions that will have certain adverse air quality effects in other states.