FWS determined threatened species status under the ESA for the silverspot butterfly from Colorado, New Mexico, and Utah, and issued a rule under §4(d) under the Act to provide for the conservation of the species. 

NMFS listed the queen conch as a threatened species under the ESA. 

EPA entered into a proposed administrative settlement under CERCLA for recovery of past response costs concerning the Milwaukee Die Casting Site in Milwaukee, Wisconsin. 

United States v. 1500 South Tibbs LLC, No. 1:24-cv-235 (S.D. Ind. Feb. 5, 2024). Under a proposed consent decree, a settling CERCLA defendant must pay the United States a total of $112,805.24 for EPA’s response costs, pay the state of Indiana a total of $21,061.53 for its past response costs, pay future response costs incurred by the United States and the state, and perform remedial work in connection with the Reilly Tar and Chemical Superfund Site in Indianapolis, Indiana. 

EPA proposed to authorize changes to South Dakota's hazardous waste management program under RCRA.

EPA proposed to amend the definition of hazardous waste applicable to corrective action to address releases from solid waste management units at RCRA-permitted treatment, storage, and disposal facilities and make related conforming amendments. 

EPA proposed to add nine specific per-and polyfluoroalkyl substances (PFAS), their salts, and their structural isomers to its list of hazardous constituents under RCRA. 

EPA approved changes to South Dakota’s hazardous waste management program under RCRA. 

FWS announced a 90-day finding on a petition to list the Kings River pyrg as endangered or threatened under the ESA, finding that the petitioned action may be warranted and initiating a status review. 

FWS announced findings that listing the gray wolf in the western United States and in the northern Rocky Mountains as endangered or threatened species under the ESA are not warranted at this time.