EPA proposed to promulgate new greenhouse gas (GHG) standards for heavy-duty highway vehicles starting in model year (MY) 2028 through MY 2032 and to revise certain GHG standards for MY 2027, including updating discrete elements of the Averaging Banking and Trading program; to add warranty requirements for batteries and other components of zero emission vehicles; to revise certain highway heavy-duty vehicle provisions and certain test procedures for heavy-duty engines; and to revise regulations addressing preemption of state regulation of new locomotives and new engines used in locomotives.

United States v. Williams Cos., Inc., No. 1:23-cv-00994-KLM (D. Colo. Apr. 20, 2023). Settling CAA defendants must take specified actions to address alleged violations, pay a civil penalty of $3,750,000, and take several pollution mitigation actions to reduce volatile organic compound emissions in connection with alleged violations of the Leak Detection and Repair provisions and other requirements in the Act's new source performance standards and NESHAPs.

FWS determined threatened species status for the Big Creek crayfish and the St. Francis River crayfish under the ESA, designated approximately 1,069 river miles in Missouri as critical habitat for the Big Creek crayfish and 1,043 river miles in Missouri as critical habitat for the St. Francis River crayfish, and finalized a rule under §4(d) of the Act that provides measures that are necessary and advisable to provide for the conservation of both species.

FWS determined endangered species status for the South Llano springs moss under the ESA.

The Natural Resources Conservation Service announced its intent to issue a series of revised conservation practice standards in the National Handbook of Conservation Practices (NHCP), and seeks comment on specified conservation practice standards in the NHCP.

United States v. MPLX, LP,  No. 2:23-cv-00252-RJS (D. Utah Apr. 20, 2023). A settling CAA defendant must take specified actions to come into compliance with the CAA, pay a civil penalty of $2 million, and take several pollution mitigation actions to reduce volatile organic compound emissions in connection with alleged violations of the Leak Detection and Repair provisions and other requirements in the Act's new source performance standards and NESHAPs.

SIP Approval: Michigan (revisions to air pollution control rules concerning definitions and air use approval, and removal of rules that are part of Michigan’s Title V Renewable Operating Permit program and that have been moved to other sections of the Michigan Administrative Code).

EPA proposed amendments to the work practice standards for pressure relief devices, emergency flaring, and degassing of floating roof storage vessels in connection with the Generic Maximum Achievable Control Technology, Organic Liquids Distribution (Non-Gasoline), Miscellaneous Organic Chemical Manufacturing, and Petroleum Refineries NESHAPs.

The president issued Executive Order No. 14096, Revitalizing Our Nation's Commitment to Environmental Justice For All; among other things, the Order reaffirms a commitment to and sets steps for a governmentwide approach to environmental justice, and creates the White House Office of Environmental Justice within CEQ.

DOE seeks comment regarding the Office of Fossil Energy and Carbon Management’s methane mitigation technologies and point source carbon capture research and development activities and regulation of natural gas imports and exports; specifically, the Department seeks information on strategies and technologies that natural gas and liquefied natural gas companies are deploying or could deploy to reduce greenhouse gas emissions and other air pollutants.