SIP Approval: New Hampshire (reasonably available control technology requirements for PAK Solutions, LLC). 

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. 

EPA issued a rule under TSCA to address the unreasonable risk of injury to health presented by chrysotile asbestos based on the risks posed by certain conditions of use. 

SIP Approval: Arizona (stationary source permits). 

BLM finalized a rule to reduce the waste of natural gas from venting, flaring, and leaks during oil and gas production activities on federal and Indian leases and to ensure that, when federal or Indian gas is wasted, the public and Indian mineral owners are compensated for the wasted gas through royalty payments. 

EPA adopted FWS' categorical exclusion for restoration activities of wetland, riparian, instream, and native habitats under NEPA to use in certain water grants and loan programs administered by the Agency. 

SIP Approval: Iowa (updates to incorporations by reference to methods for performance testing, updates to definitions, and adoption of most recent ozone NAAQS). 

The Federal Aviation Administration adopted standards for measuring non-volatile particulate matter exhaust emissions from aircraft engines.

SIP Proposal: Georgia (vehicle inspection and maintenance program). 

SIP Approval: Arkansas (revisions to rules concerning implementation for air pollution control).