EPA updated the regulatory framework governing the management and protection of environmental, fish and wildlife, other surface resources, and special areas in the National Petroleum Reserve in Alaska.

EPA finalized the technology reviews conducted for the NESHAP for gasoline distribution facilities and the review of the new source performance standards for bulk gasoline terminals. 

EPA finalized a rule to address the unreasonable risk of injury to health presented by methylene chloride under its conditions of use under TSCA. 

EPA designated two per- and polyfluoroalkyl substances (PFAS), perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), including their salts and structural isomers, as hazardous substances under CERCLA. 

EPA established requirements for legacy coal combustion residuals (CCR) surface impoundments, as well as CCR management units at active CCR facilities and at inactive CCR facilities with a legacy CCR surface impoundment. 

NMFS announced the initiation of a five-year review for the non-U.S. distinct population segment of smalltooth sawfish under the ESA. 

EPA finalized amendments to NESHAPs for the coal- and oil-fired electric utility steam generating units source category.

The U.S. Sentencing Commission announced that it has promulgated amendments to the sentencing guidelines, policy statements, commentary, and statutory index.

SIP Approval: Nevada (nonattainment new source review requirements for the 2015 ozone NAAQS for Clark County Department of Environment and Sustainability).