The Environmental Protection Agency (EPA) is taking final action to disapprove under the Clean Air Act (CAA or ``Act''), state implementation plan (SIP) submissions from the State of California that address contingency measures requirements for the 2008 ozone national ambient air quality standards (NAAQS) in the Sacramento Metro, California ozone nonattainment area. The EPA is finalizing this disapproval because the SIP submissions do not provide for contingency measures that would be triggered if the area fails to attain the NAAQS or make reasonable further progress (RFP).

The Environmental Protection Agency (EPA) is finalizing an approval, a partial approval and partial disapproval, and a limited approval and limited disapproval of certain revisions to the Clark County portion of the Nevada State Implementation Plan (SIP). These revisions primarily concern the Clark County Department of Environment and Sustainability's (``DES'' or ``Department'') general definitions rule and New Source Review (NSR) permitting program for new and modified sources of air pollution under the Clean Air Act (CAA or ``Act'').

The Environmental Protection Agency (EPA) is proposing to approve changes to the Georgia State Implementation Plan (SIP), submitted by the State of Georgia through the Georgia Environmental Protection Division (GA EPD) via a letter dated November 4, 2021. The SIP revision revises Georgia's Stage I vapor recovery rules primarily by removing outdated references and making several clarifying edits. The revision also updates several definitions and makes two substantive changes. EPA is proposing to approve these changes pursuant to the Clean Air Act (CAA or Act).

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the Mojave Desert Air Quality Management District (MDAQMD or ``District'') portion of the California State Implementation Plan (SIP). This revision concerns emissions of oxides of nitrogen (NO<INF>X</INF>) from Portland cement kilns. We are approving a local rule that regulates these emission sources under the Clean Air Act (CAA or the Act).