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 amending our recent proposal to approve a revision to the Louisiana State Implementation Plan (SIP) for regional haze submitted for parallel processing on August 24, 2017. On July 13, 2017, we proposed to approve a SIP revision by the State of Louisiana through the Louisiana Department of Environmental Quality (LDEQ) to address certain Best Available Retrofit Technology requirements under Regional Haze for the Entergy R. S. Nelson facility (Nelson), which is an electric generating unit in Calcasieu Parish. We now amend that proposal, by proposing to approve a compliance date three years from the effective date of the final EPA approval of the SIP revision for Nelson to meet an emission limit for sulfur dioxide (SO2) emissions.