The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of South Carolina, through the South Carolina Department of Health and Environmental Control (SC DHEC or Department), on April 24, 2020. The SIP revision proposes a non-substantive formatting change and the removal of an outdated sentence regarding test methods for gaseous fluorides from South Carolina's ambient air quality standards regulation. EPA is proposing to approve these changes pursuant to the Clean Air Act (CAA or Act) and implementing federal regulations.