EPA updated outer continental shelf air regulations for California.

EPA proposed to allow refiners and laboratories to use an alternative test method for olefin content in gasoline.

SIP Proposal: California (VOC emissions for the Antelope Valley air quality management district and the Placer County, Santa Barbara, and Ventura County air pollution control districts; see above for direct final rule)

EPA proposed to withdraw certain aquatic life water quality criteria for waters of the Great Lakes in Wisconsin.

EPA proposed revisions to the unregulated contaminant monitoring regulation for public water systems.

OSM proposed to approve an amendment to Pennsylvania's regulatory program under SMCRA concerning limitations for post-mining discharges.

OSM proposed to approve an amendment to Pennsylvania's regulatory program under SMCRA that would remove a required amendment on regulatory exemptions for coal extraction incidental to the extraction of other minerals.

OSM approved an amendment to Montana's regulatory program under SMCRA concerning letters of credit issued by banks.

OSM approved an amendment to Louisiana's regulatory program and abandoned mine land reclamation plan under SMCRA covering a wide range of provisions.

OSM approved an amendment to Kentucky's regulatory program under SMCRA pertaining to the disposal of coal mine waste.