The Environmental Protection Agency (EPA) is taking final action to approve two revisions to the Jefferson County portion of the Kentucky State Implementation Plan (SIP), provided by the Commonwealth of Kentucky, through the Kentucky Division of Air Quality (KDAQ), through a letter dated March 15, 2018. The revisions were submitted by KDAQ on behalf of the Louisville Metro Air Pollution Control District (also referred to herein as Jefferson County) and add a recordkeeping provision for certain sources of volatile organic compounds along with other administrative changes. EPA is approving the changes because they are consistent with the Clean Air Act (CAA or Act).