SIP Proposal: Kentucky (updates to geographical boundary description and attainment status designation for the Henderson-Webster nonattainment area for the 2010 sulfur dioxide primary NAAQS).

The National Aeronautics and Space Administration amended and updated its regulations for implementing NEPA, and incorporated updates to its categorical exclusions. 

EPA entered into a proposed administrative settlement agreement under CERCLA for past response costs associated with the Chemical Recycling Inc., Superfund Site in Wylie, Texas. 

SIP Proposal: Colorado (base-year emissions inventory for the Denver Metro/North Front Range 2015 eight-hour ozone nonattainment area, certification that existing Air Pollutant Emissions Notice (APEN) program fulfills the CAA’s emission statement rule requirement, and new requirement for annual certification of APEN reported emissions). 

EPA proposed to grant a second one-year extension of the attainment date for the Uinta Basin, Utah marginal nonattainment area under the 2015 ozone NAAQS, and to determine that the area attained the standard by the extended attainment date of August 3, 2023. 

SIP Proposal: Wyoming (regional haze). 

BLM finalized a rule to reduce the waste of natural gas from venting, flaring, and leaks during oil and gas production activities on federal and Indian leases and to ensure that, when federal or Indian gas is wasted, the public and Indian mineral owners are compensated for the wasted gas through royalty payments. 

EPA proposed to promulgate a CWA chronic aquatic life ambient water quality criterion for waters under the state of Idaho’s jurisdiction to protect aquatic life from exposure to harmful concentrations or levels of total mercury.