EPA seeks comment on its proposal to update fine particulate matter (PM) data from T640/T640X PM mass monitors. 

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. 

EPA announced the availability of and seeks comment on the Draft Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2022. 

EPA made corrections and clarifications to the new source performance standards for electric arc furnaces and argon-oxygen decarburization vessels in the steel industry. 

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

DOI announced the dates of tribal consultation meetings to gather information to revise procedures for conducting natural resource damage assessment and restoration for hazardous substance releases.

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. 

United States v. Lowell, Massachusetts, City of, No. 1:24-cv-10290 (D. Mass. Feb. 5, 2024). Under a proposed consent decree, a settling CWA defendant that allegedly engaged in unpermitted and illegal discharges from its wastewater collection system and small municipal separate storm sewer system must take measures necessary to achieve and maintain compliance and pay a $200,000 civil penalty for past noncompliance. 

EPA announced its intent to redesignate portions of Westmoreland County and Cambria County, Pennsylvania, to “nonattainment” for the 2010 sulfur dioxide NAAQS.