EPA entered into a proposed consent decree in Sierra Club v. EPA, No. 3:24-cv-00130 (S.D.W. Va.), concerning allegations that the Agency failed to perform a mandatory duty under the CWA to establish TMDLs for certain waters located in the Lower Guyandotte River Watershed in West Virginia that are impaired due to ionic toxicity. 

EPA entered into a proposed administrative settlement agreement for remedial investigation addendum/focused feasibility study under CERCLA associated with the Smeltertown site near Salida, Colorado. 

EPA finalized facility response plan requirements for worst case discharges of CWA hazardous substances for onshore non-transportation-related facilities that could reasonably be expected to cause substantial harm to the environment by discharging a CWA hazardous substance into or on the navigable waters, adjoining shorelines, or exclusive economic zone. 

EPA announced the availability of its final general NPDES permit for water discharges from facilities classified as low threat located in the Navajo Nation.

EPA proposed to revise regulations that allow for the open burning and detonation (OB/OD) of waste explosives by reducing OB/OD of waste explosives and increasing control of air emissions. 

United States v. Ameren Corp., No. 1:24-cv-00047 (E.D. Mo. Mar. 12, 2024). Under a proposed consent decree, settling CERCLA defendants must pay $6,074,739 and certain settling federal agencies must pay a further $600,798 for costs the United States incurred responding to releases of hazardous substances at the Missouri Electric Works Superfund site in Cape Girardeau, Missouri. 

United States v. General Recycling of Washington, LLC, No. 2:24-cv-00329 (W.D. Wash. Mar. 12, 2024). Under a proposed consent decree, settling CERCLA, CWA, and OPA defendants must construct, monitor, and maintain a habitat restoration project and pay a total of $360,558.12 for assessment costs in connection with natural resource damages caused by releases of hazardous substances and discharges of oil from facilities located near the Lower Duwamish River. 

United States v. Crowley Marine Services, Inc., No. 2:24-cv-00307 (W.D. Wash. Mar. 7, 2024). Under a proposed consent decree, settling CERCLA, CWA, and OPA defendants must purchase credits in a habitat restoration project constructed along the Lower Duwamish River, pay a total of $210,000 for natural resource damages, and pay $64,325.63 to reimburse assessment costs in connection with natural resource damages caused by releases of hazardous substances and discharges of oil from facilities located along and near the river. 

The Pipeline and Hazardous Materials Safety Administration and NRC jointly seek comments on issues concerning requirements in the International Atomic Energy Agency regulations for the safe transport of radioactive materials. 

EPA Region 4 reissued the NPDES general permit for existing and new sources and new dischargers in the offshore subcategory of the oil and gas extraction point source category located and discharging to the outer continental shelf of the eastern Gulf of Mexico.