Approval and Promulgation of Implementation Plans; Louisiana; 2008 8-Hour Ozone Maintenance Plan Revision for Baton Rouge

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Louisiana on January 31, 2018, revising the 2008 8-hour ozone maintenance plan and requesting a relaxation of the Federal Reid Vapor Pressure (RVP) requirements for the five-parish Baton Rouge area. EPA is proposing to determine that the relaxation of the RVP requirement would not interfere with attainment or maintenance of the NAAQS or with any other CAA requirement.