SIP Approval: Delaware (volatile organic compound emissions).

SIP Approval: California (designation of nonattainment of the one-hour ozone NAAQS for the San Joaquin Valley, South Coast, and Southeast Desert areas).

SIP Approval: California (nitrogen oxide and sulfur oxide emissions for the South Coast air quality management district).

EPA entered into a proposed settlement agreement that establishes deadlines for the Agency to determine whether nonattainment areas in Connecticut, Massachusetts, Missouri, New Jersey, and New York attained the 1997 eight-hour ozone NAAQS. 

EPA entered into a proposed consent decree in WildEarth Guardians v. Jackson, No. 2:11-cv-01661-ROS (D. Ariz.), that establishes a deadline for the Agency to promulgate the area designations for the 2008 ground-level ozone NAAQS.

EPA proposed to approve Florida's plan to implement and enforce emissions guidelines on existing HMIWIs.

EPA proposed amendments to the NESHAP for new and existing industrial, commercial, and institutional boilers and process heaters promulgated on March 21, 2011. 

EPA proposed amendments to the NESHAP for industrial boilers and commercial and institutional boilers promulgated on March 21, 2011. 

EPA proposed certain amendments to the area source NESHAP for prepared feeds manufacturing promulgated on January 5, 2010.

EPA proposed amendments to the new source review PSD program that would allow delegation of the program to interested Indian tribes.