Pursuant to the Federal Clean Air Act (CAA or Act), the Environmental Protection Agency (EPA) is proposing to approve two revisions to the Arkansas State Implementation Plan (SIP) submitted by the Governor of the State of Arkansas on May 12, 2022, and November 1, 2022. The revisions were submitted in response to a finding of substantial inadequacy and SIP call published by EPA on June 12, 2015, which included certain provisions in the Arkansas SIP related to excess emissions during startup, shutdown, and malfunction (SSM) events.

The Environmental Protection Agency (EPA) is removing the ``emergency'' affirmative defense provisions from the EPA's title V operating permit program regulations. These provisions established an affirmative defense that sources could have asserted in enforcement cases brought for noncompliance with technology-based emission limitations in operating permits, provided that the exceedances occurred due to qualifying emergency circumstances.

The Environmental Protection Agency (EPA) is taking final action to approve the ``Coso Junction PM<INF>10</INF> Planning Area Second 10-Year Maintenance Plan'' (``Coso Junction Second Maintenance Plan'' or ``Plan'') as a revision to the state implementation plan (SIP) for the State of California. The Coso Junction Second Maintenance Plan includes, among other elements, a base year emissions inventory, a maintenance demonstration, and contingency provisions.

The Environmental Protection Agency (EPA) is approving, under the Clean Air Act (CAA), a State Implementation Plan (SIP) revision submitted by the Ohio Environmental Protection Agency (Ohio EPA) on September 7, 2022. Ohio EPA requests that EPA approve revised volatile organic compounds (VOCs) control rules under Chapter 3745-112 of the Ohio Administrative Code (OAC) into Ohio's SIP. The revised rules will reduce emissions that contribute to ozone formation and assist with efforts to achieve and maintain the 2015 ozone National Ambient Air Quality Standard (NAAQS).