Air Plan Approval; Arkansas; Regional Haze and Interstate Visibility Transport Federal Implementation Plan; Withdrawal of Federal Implementation Plan Provisions for the Domtar Ashdown Mill

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-10019-83-Region 6] AGENCY: Environmental Protection Agency (EPA). ACTION: Final rule. SUMMARY: The Environmental Protection Agency (EPA) is taking final action to withdraw the remaining portion of a Federal Implementation Plan (FIP) for Arkansas that was published in the Federal Register on September 27, 2016, which addressed certain regional haze obligations for the first implementation period for the Domtar Ashdown Mill. Specifically, this remaining portion of the FIP we are withdrawing contains best available retrofit technology (BART) requirements for sulfur dioxide (SO 2 ) and nitrogen oxide (NO X ) for Domtar Ashdown Mill Power Boiler No. 1; and SO 2 , NO X , and particulate matter (PM) BART requirements for Power Boiler No. 2. These portions of the FIP are being replaced by a revision to the Arkansas State Implementation Plan (SIP) containing SO 2 , NO X , and PM 10 BART alternative emission limitations that we are taking final action to approve in a separate rulemaking that is also being published in this issue of the Federal Register . DATES: This final rule will be effective April 21, 2021. ADDRESSES: The EPA has established a docket for this action under Docket No. EPA-R06-OAR-2015-0189. All documents in the docket are listed at the http://www.regulations.gov website. Although listed in the index, some information is not publicly available, e.g., confidential business information or other in…