The Environmental Protection Agency (EPA) is taking final action to approve a State Implementation Plan (SIP) revision provided by the State of North Carolina, through the North Carolina Department of Environmental Quality, Division of Air Quality (DAQ), on January 12, 2018. The SIP revision makes changes to the State's combined construction and operating permit program for non-Title V sources. EPA is proposing to approve the revision to the North Carolina SIP because it is consistent with the Clean Air Act (CAA or Act).