SIP Approval: Illinois (reasonably available control technology for the Chicago and Metro-East St. Louis eight-hour ozone nonattainment areas).

EPA proposed to revise the use condition for hydrofluoroolefin in motor vehicle air conditioning under the Significant New Alternatives Policy program.

United States v. Kentucky Utilities Co., No. 5:07-CV-75-KSF (E.D. Ky. Mar. 12, 2012). Under a stipulated order, a settling CAA defendant responsible for violations at the E.W. Brown Generating Station in Mercer County, Kentucky, must perform substitute mitigation projects valued at approximately $1,200,000.

FWS established a manatee refuge in Kings Bay, Florida, including its tributaries and connected waters, to restrict waterborne activities that impact the species.

SIP Withdrawal: New Jersey (final rulemaking of December 22, 2011, on sulfur dioxide emissions from the Portland generating station).

SIP Approval: Connecticut (attainment of the one-hour ozone NAAQS for the Greater Connecticut serious nonattainment area).

EPA proposed to revise the definition of "regulated new source review pollutant" in its PSD regulations and in the Emission Offset Interpretative Ruling.

United States v. 110 Sand Co., No. CV-09-4209 (E.D.N.Y. Mar. 7, 2012). Settling CAA defendants responsible for violations of PSD provisions and of NAAQS for hydrogen sulfide and SO2 at their demolition and debris landfill in Melville, New York, must pay a $150,000 civil penalty; must continue operation and maintenance of pollution control technology already installed; must comply with emissions limitations; and must maintain and continue operation of the landfill's gas collection system.

FWS issued an advance notice of proposed rulemaking on voluntary conservation actions to reduce or eliminate the need to list species as endangered or threatened under the ESA.

EPA announced the availability for public comment of its proposed decision identifying water quality limited segments and associated pollutants in Oregon to be listed under CWA §303(d)(2).