EPA announced that it will approve implementation of Illinois' rules on long-term enhanced surface water treatment and on disinfectants and disinfection byproducts.

EPA Region 6 reissued the NPDES general permit authorizing discharges from exploration, development, and production facilities in the territorial seas off Texas.

OSM approved several amendments to Texas' regulatory program under SMCRA regarding permit requirements.

EPA entered into a proposed administrative settlement under CERCLA that requires the settling party to pay U.S. response costs incurred at the Constitution Road Drum Superfund site in Atlanta, Georgia. 

EPA entered into a proposed administrative settlement under CERCLA that requires the settling party to pay $33,057.67 in U.S. response costs incurred at the Hidden Lane Landfill Superfund site in Sterling, Virginia. 

EPA proposed to establish uality assurance and quality control procedures for continuous opacity monitoring systems.

EPA proposed thresholds for classifying nonattainment areas for the ozone NAAQS promulgated on March 12, 2008.

EPA established quality assurance and quality control procedures for continuous opacity monitoring systems. 

The federal agencies issued their semiannual regulatory agendas providing specific information on the status of regulations under development and revision. Rulemaking actions are grouped according to prerulemaking, proposed rules, final rules, long-term actions, and rulemaking actions completed since the summer 2011 agenda. EPA's agenda can be found at 77 FR 8004.

SIP Approval: Montana (partial approval of air quality permit revisions).