SIP Approval: Colorado (partial approval of interstate transport of pollution plan)

SIP Proposal: California (limited approval of permitting rules for the Placer County air pollution control district and the Feather River air quality management district)

SIP Approval: California (energy tracking system for the South Coast air quality management district).

SIP Proposal: California (limited approval of permitting rules for the Sacramento metropolitan air quality management district)

SIP Approvals: California (nitrogen oxide emissions for the Sacramento metropolitan air quality management district).

SIP Proposal: California (termination of backsliding fees for the Sacramento Metro one-hour ozone nonattainment area).

EPA made final amendments to certain CAA regulations pertaining to Indian tribes.

EPA granted reconsideration of certain provisions of the Mandatory Greenhouse Gas Reporting Rule promulgated on November 30, 2010.

EPA approved negative declarations and requests for EPA withdrawal of its CAA §§111(d) and 129 plan approval for HMIWI, large municipal waste combustor (LMWC), small municipal waste combustor (SMWC), and other solid waste incinerator (OSWI) units from Florida, Kentucky, North Carolina, and South Carolina.

SIP Proposal: California (PSD permit programs for the Northern Sonoma County air pollution control district and the Mendocino County air quality management district; see above for direct final rule)