SIP Proposal: New Mexico (1997 eight-hour NAAQS for Sunland Park through 2014; see above for direct final rule).

FWS-Fisheries proposed revisions to the regulations on textual descriptions of proposed and final critical habitat boundaries in the Federal Register, in response to Executive Order No. 13563 of January 18, 2011.

EPA Region 10 reproposed effluent limits for mercury, copper, total aromatic hydrocarbons, total aqueous hydrocarbons, silver, and whole effluent toxicity under the NPDES general permit for oil and gas exploration, development, and production facilities in Cook Inlet, Alaska.

United States of America v. BASF Corp., No. 3:11-cv-00222 (S.D. Tex. May 13, 2011). A settling CAA defendant that violated SIP, NESHAP, and new stationary source performance requirements at a chemical manufacturing facility in Freeport, Texas, must pay a $500,000 civil penalty and must meet certain injunctive relief requirements.

SIP Approval: Virginia (definition of VOC)

EPA established annual percentage standards under CAA §211(o) for cellulosic biofuel, biomass-based diesel, advanced biofuel, and renewable fuels produced or imported in calendar year 2011.

EPA proposed to issue a 90-day stay of the requirement for chemical manufacturing area sources to comply with the NESHAPs permit program; see above for direct final rule

SIP Proposal: Maryland (definition of "fuel-burning equipment"; see above for direct final rule)

NOAA-Fisheries announced a 12-month finding on a petition to delist coho salmon south of the San Francisco Bay under the ESA; the agency found that delisting is not warranted and recommended extension of the area covered.

FWS reclassified the Okaloosa darter from endangered to threatened under the ESA due to a substantial improvement in the species' status.