Air Plan Approval and Promulgation of State Implementation Plan, Louisiana; Attainment Demonstration for the St. Bernard Parish 2010 SO2 Primary National Ambient Air Quality Standard Nonattainment Area

The Environmental Protection Agency (EPA) is approving the State Implementation Plan (SIP) revision that the State of Louisiana submitted to EPA on November 9, 2017 with supplements provided on February 8, 2018, August 24, 2018 and October 9, 2018. The purpose of this revision is to provide for attainment of the 1-hour sulfur dioxide (SO<INF>2</INF>) primary national ambient air quality standard (NAAQS) in the St. Bernard Parish, Louisiana Nonattainment Area. This plan (herein called a "nonattainment plan") includes Louisiana's attainment demonstration and other elements required under the Clean Air Act (CAA). In addition to an attainment demonstration, the nonattainment plan addresses the requirements for meeting reasonable further progress (RFP) toward attainment of the NAAQS, implementation of reasonably available control measures and reasonably available control technology (RACM/RACT), base-year and projection-year emission inventories, enforceable emissions limitations and control measures, and contingency measures. EPA concludes that Louisiana has appropriately demonstrated that the nonattainment plan provisions provide for attainment of the 2010 1-hour primary SO<INF>2</INF> NAAQS in the St. Bernard Parish, Louisiana Nonattainment Area by the applicable attainment date and that the nonattainment plan meets the other applicable requirements under the CAA. This action is being taken in accordance with the CAA.