Approval and Promulgation of Air Quality Implementation Plans; Louisiana; Infrastructure State Implementation Plan Requirements for the National Ambient Air Quality Standards

The Environmental Protection Agency (EPA) is proposing to approve elements of a State Implementation Plan (SIP) submission from the State of Louisiana for National Ambient Air Quality Standards (NAAQS) for fine particulate matter (PM2.5), lead (Pb), ozone (O3), nitrogen dioxide (NO2), and sulfur dioxide (SO2). This submission addresses how the existing SIP provides for implementation, maintenance, and enforcement of the NAAQS for these pollutants (also referred to as an infrastructure SIP or i-SIP). These i-SIPs ensure that the State's SIP is adequate to meet the state's responsibilities under the Federal Clean Air Act (CAA).