Approval and Promulgation of Implementation Plans; Louisiana; Regional Haze State Implementation Plan

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is finalizing an approval of revisions to the Louisiana State Implementation Plan (SIP) submitted by the State of Louisiana through the Louisiana Department of Environmental Quality (LDEQ) that address regional haze for the first planning period. LDEQ submitted these revisions to address the requirements of the Clean Air Act (CAA) and the EPA's rules that require states to prevent any future and remedy any existing anthropogenic impairment of visibility in mandatory Class I areas (national parks and wilderness areas) caused by emissions of air pollutants from numerous sources located over a wide geographic area (also referred to as the ``regional haze program''). To address the Best Available Retrofit Technology (BART) requirement for sulfur dioxide (SO2), oxides of nitrogen (NOX) and particulate matter (PM), the EPA is finalizing approval of source-by- source BART determinations for certain electric generating and non- electric generating units. To address the BART requirement for NOX for electric generating units, we are finalizing our proposed determination that Louisiana's participation in the Cross- State Air Pollution Rule's (CSAPR) trading program for ozone-season NOX qualifies as an alternative to BART.