Air Plan Approval; Arkansas; Arkansas Regional Haze and Visibility Transport State Implementation Plan Revisions and Withdrawal of Federal Implementation Plan

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Environmental Protection Agency 40 CFR Part 52 [EPA-R06-OAR-2015-0189; FRL-10006-02-Region 6] AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: Pursuant to the Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve a revision to the Arkansas State Implementation Plan (SIP) submitted by the State of Arkansas through the Arkansas Division of Environmental Quality (ADEQ) on August 13, 2019. The SIP submittal addresses requirements of the Act and the Regional Haze Rule for visibility protection in mandatory Class I Federal areas (Class I areas) for the first implementation period. The EPA is proposing to approve an alternative measure to best available retrofit technology (BART) for sulfur dioxide (SO 2 ), particulate matter (PM), and nitrogen oxide (NO X ) at the Domtar Ashdown Mill and elements of the SIP submittal that relate to these BART requirements at this facility. In addition, we are proposing to approve the withdrawal from the SIP the previously approved PM 10 BART limit and the federal implementation plan (FIP) provisions for the Domtar Ashdown Mill. The EPA is also concurrently proposing to approve Arkansas' interstate visibility transport provisions from the August 10, 2018, regional haze SIP submittal as supplemented by the visibility transport provisions in the October 4, 2019, interstate transport SIP submittal, which covers the following national ambient air quality standards (NAAQS): The 200…