The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the North Carolina Department of Environmental Quality (NCDEQ), Division of Air Quality (DAQ), via a letter dated April 13, 2021. This SIP revision includes changes to NCDEQ's regulations regarding bulk gasoline terminals and plants, gasoline cargo tanks and vapor collection systems, and leak tightness and vapor leak requirements. EPA is approving these changes pursuant to the Clean Air Act (CAA or Act).