Promulgation of Air Quality Implementation Plans; State of Arkansas; Regional Haze and Interstate Visibility Transport Federal Implementation Plan; Revision of Federal Implementation Plan

The Environmental Protection Agency (EPA) is proposing to revise the Federal Implementation Plan (FIP) that was published in the Federal Register on September 27, 2016, to address certain regional haze and visibility transport requirements under the Federal Clean Air Act (the Act, or CAA) for the State of Arkansas. The specific portions of the Arkansas Regional Haze FIP that the EPA is proposing to revise are the compliance dates for the nitrogen oxide (NOX) emission limits for the Entergy White Bluff Plant (White Bluff) Units 1 and 2, the Entergy Independence Plant (Independence) Units 1 and 2, and the American Electric Power (AEP) Flint Creek Unit 1. EPA is proposing to extend the compliance dates for the NOX emission limits for these five electric generating units (EGUs) by 21 months to January 27, 2020.