FWS announced findings that delisting the southern sea otter is not warranted at this time, and that listing the Cascades frog, plains spotted skunk, sicklefin chub, sturgeon chub, Tennessee cave salamander, and Yazoo crayfish as endangered or threatened species under the ESA is not warranted at this time.

FWS proposed to list the Miami cave crayfish as a threatened species under the ESA, with a rule issued under §4(d) of the Act.

EPA announced the availability of its proposed interim registration review decision for the pesticide tetrachlorvinphos.

The EPA Administrator signed an order granting in part and denying in part a petition from Earthjustice, on behalf of Elyria and Swansea Neighborhood Association and other groups, requesting that EPA object to a CAA operating permit issued by the Colorado Department of Public Health and Environment to Suncor Energy, Inc. for its Refinery Plant 2 Facility in Adams County, Colorado.

FWS proposed updated planning policies for the National Wildlife Refuge System to incorporate landscape conservation plans and consideration of climate change and other anthropogenic forces in refuge management.

SIP Approval: Missouri (revisions to Cross-State Air Pollution Rule Sulfur Dioxide Group 1 Trading Program).

SIP Approval: California (nonattainment new source review requirements for stationary sources in the El Dorado County Air Quality Management District).

EPA proposed to amend the general provisions for NESHAPs to address applicability and compliance issues resulting from the addition of a compound to the list of hazardous air pollutants under the CAA.

FWS proposed to list the Quitobaquito tryonia as an endangered species under the ESA, and to designate approximately 6,095 square feet in Arizona as critical habitat for the species.

United States v. Transocean Offshore Deepwater Drilling Inc., No. 4:23-cv-03317 (S.D. Tex. Sept. 6, 2023). Under a proposed consent decree, a settling CWA defendant that discharged pollutants without obtaining coverage under an NPDES general permit and exceeded effluent limitations prescribed by the general permit must develop and implement a compliance system to ensure future compliance with the CWA and the general permit, and pay a $507,000 civil penalty.