The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the North Carolina Division of Air Quality (NCDAQ) on behalf of the Forsyth County Office of Environmental Assistance and Protection (FCEAP or Forsyth County) on November 28, 2022. The revision was submitted in response to a finding of substantial inadequacy and SIP call published on June 12, 2015, concerning excess emissions during startup, shutdown, and malfunction (SSM) events. EPA is approving the SIP revision in accordance with requirements for SIP provisions under the Clean Air Act (CAA or Act) and finds that such SIP revision corrects the deficiencies identified in the Forsyth County portion of the North Carolina SIP in the June 12, 2015, SIP Call. EPA is also approving minor and administrative changes to certain regulatory provisions that have been revised by the local agency since EPA's last approval of those provisions.