EPA Region 10 proposed to approve a modification to Alaska's municipal solid waste landfill program concerning research, development, and demonstration permit requirements; see above for direct final rule.

EPA entered into a proposed administrative settlement under CERCLA that requires the settling parties to pay past and future U.S. response costs incurred at the D'Imperio Property Superfund site in Hamilton Township, New Jersey.

United States v. AK Steel Corp., No. 97-1863 (W.D. Pa. Feb. 28, 2011). A settling CERCLA defendant responsible for violations at the Breslube Penn Superfund site in Coraopolis, Pennsylvania, must pay $1,398,412 in contribution claims and past U.S. response costs incurred at the site. 

EPA determined that Arizona, Arkansas, Florida, Idaho, Kansas, Oregon, and Wyoming have failed to submit revisions to their EPA-approved SIPs to apply PSD requirements to GHG-emitting sources.

SIP Approval: Kentucky (Greenhouse Gas Tailoring Rule revision).

EPA withdrew rulemaking that granted a site-specific treatment variance to U.S. Ecology Nevada in Beatty, Nevada, and withdrew an existing site-specific treatment variance issued to Chemical Waste Management, Inc. in Kettleman Hills, California, due to adverse comment.

SIP Proposal: California (PSD permit programs for the Northern Sonoma County air pollution control district and the Mendocino County air quality management district; see above for direct final rule)

SIP Approval: Illinois (definition of volatile organic compound).

SIP Proposal: Illinois (definition of VOC)

SIP Proposal: Wyoming (attainment of the 1997 ozone NAAQS).