EPA announced the availability of acute freshwater aquatic life screening values for 6PPD and its transformation product 6PPD-quinone. 

EPA entered into a CERCLA settlement agreement with LPC Holdings, Inc., concerning recovery of cleanup costs at the Aberdeen Contaminated Groundwater Superfund Site in Aberdeen, North Carolina. 

EPA proposed to enter into individual CERCLA settlements with seven additional parties concerning the recovery of cleanup costs at Bennett Landfill Fire Site in Chester, South Carolina. 

FERC proposed to amend regulations to clarify that for all proceedings before the Commission that require a water quality certification pursuant to §401(a)(1) of the CWA, the reasonable period of time during which the certifying authority may act on the water quality certification request is one year from the certifying authority’s receipt of the request.

United States v. Union Carbide Corp., No. 1:24-cv-01463 (D. Colo. May 23, 2024). Under a proposed consent decree, settling CERCLA defendants must pay $600,000 to reimburse response costs incurred at the Uravan Uranium Project Superfund Site in Montrose County, Colorado, and to comply with institutional controls and other requirements for property owned within the site. 

United States v. PSF, Inc., No. 3:24-cv-00112 (D. Alaska May 24, 2024). Under a proposed consent decree, settling CWA defendants that allegedly violated the conditions and limitations of their NPDES permits at their facilities in Valdez and King Cove, Alaska, must perform injunctive relief and pay $750,000 in civil penalties. 

United States v. Norfolk Southern Railway Co., No. 4:23-cv-00517 (N.D. Ohio May 23, 2024). In connection with the February 3, 2023, train derailment in East Palestine, Ohio, a proposed consent decree requires a settling CWA and CERCLA defendant to (1) reimburse all response costs incurred by the United States; (2) pay a civil penalty of $15 million; (3) establish a $25 million community health program for qualifying members of the public impacted by the derailment; (4) implement an array of specified rail safety procedures; (5) develop and adopt programs for coordination of rail track restoration and vent and burn procedures; (6) implement a $6 million local waterways remediation plan; (7) pay $175,000 for natural resource damages; and (8) implement compliance and future monitoring requirements. 

EPA finalized a CWA regulation to revise the technology-based effluent limitations guidelines and standards for the steam electric power generating point source category applicable to flue gas desulfurization wastewater, bottom ash transport water and legacy wastewater at existing sources, and combustion residual leachate at new and existing sources. 

EPA designated two per- and polyfluoroalkyl substances (PFAS)—perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), including their salts and structural isomers—as hazardous substances under CERCLA. 

United States v. French Limited, Inc., No. 4:89-cv-2544 (S.D. Tex. Apr. 26, 2024). A fourth modification to a 1990 consent decree under CERCLA concerning contamination at the French Limited Superfund Site near Crosby, Texas, revises work requirements, provides for the reimbursement to EPA of certain response costs, and provides for the disbursement to members of the working group of funds received by EPA in a bankruptcy settlement payment for the site.