SIP Proposal: District of Columbia/Maryland/Virginia/West Virginia (attainment of the 1997 annual fine PM NAAQS for the District of Columbia-Maryland-Virginia and the Hagerstown-Martinsburg, Maryland-West Virginia nonattainment areas).

SIP Approval: North Dakota (air pollution control rules and administrative corrections).

SIP Approval: California (VOC, NOx, and PM emissions for the San Joaquin Valley unified air pollution control district).

SIP Approval: (VOC and particulate matter (PM) emissions for the San Joaquin Valley unified air pollution control district).

OSM proposed to approve an amendment to West Virginia's regulatory program under SMCRA concerning revisions authorized in a bill passed by the West Virginia Legislature on March 18, 2011.

OSM proposed to approve an amendment to Alaska's regulatory program under SMCRA to make it consistent with the federal program.

SIP Approval: Texas (emission limits, reductions, and other updates).

EPA entered into a proposed settlement agreement in Engine Manufacturers Assn. v. EPA, No. 10-1331 (D.C. Cir.), that requires the Agency to propose revisions to the NESHAP for reciprocating internal combustion engines and to take final action by March 14, 2013.

SIP Proposal: California (NOx emissions for the Placer County air pollution control district and the Sacramento metro air quality management district).

SIP Approval: California (volatile organic compound emissions for the Imperial County and the San Joaquin Valley unified air pollution control districts).