SIP Approval: Kentucky (rescission of replaced visibility rule provisions.

EPA entered into a proposed administrative, cash-out settlement under CERCLA for recovery of past U.S. response costs incurred at the Ophir Mills and Smelter Superfund site in Tooele County, Utah.

SIP Proposal: North Carolina (partial approval of the 1997 eight-hour ozone NAAQS).

SIP Proposal: Georgia (attainment of the 1997 eight-hour ozone NAAQS for the Atlanta nonattainment area).

SIP Approval: Kentucky (attainment of the 1997 annual fine particulate matter NAAQS for the tri-state Cincinnati-Hamilton nonattainment area).

United States v. City of Boulder, No. 11-cv-03178 WJM-MJW (D. Colo. Dec. 8, 2011). Settling CERCLA defendants responsible for violations at the Hendricks Mining and Milling Superfund site must pay $350,000 in U.S. response costs incurred at the site.

EPA announced the availability of new data on an analytical method for the measurement of oil and grease and seeks public comment.

SIP Proposal: Missouri (emissions reporting requirements; see above for direct final rule).

SIP Proposal: Massachusetts/New Hampshire (attainment of the one-hour ozone NAAQS for the serious Eastern Massachusetts nonattainment area).

SIP Approval: Missouri (emissions reporting requirements).