EPA finalized multiple actions under §111 of the CAA addressing greenhouse gas (GHG) emissions from fossil fuel-fired electric generating units (EGUs), including the repeal of the Affordable Clean Energy Rule, emission guidelines for GHG emissions from existing fossil fuel-fired steam generating EGUs, and revisions to the new source performance standards for GHG emissions from new and reconstructed fossil fuel-fired stationary combustion turbine EGUs. 

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

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.

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

NMFS proposed to modify the regulations for Marine Mammal Protection Act §104 permits, including scientific research, enhancement, photography, and public display permits and letters of confirmation.

EPA made an interim final determination that the California Air Resources Board has submitted a revised rule and has also submitted revised rules on behalf of the San Joaquin Valley Unified Air Pollution Control District, Ventura County Air Pollution Control District, and South Coast Air Quality Management District that correct deficiencies in its CAA SIP provisions concerning ozone nonattainment requirements for controlling volatile organic compounds at crude oil and natural gas facilities. 

SIP Proposal: California (revisions concerning emissions of volatile organic compounds from crude oil and natural gas facilities). 

EPA proposed revisions to the preconstruction permitting regulations that apply to modifications at existing major stationary sources in the new source review program under the CAA.