Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Revisions to Regional Haze State Implementation Plan; Revisions to Regional Haze 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-R08-OAR-2018-0606; FRL-9992-73-Region 8] AGENCY: Environmental Protection Agency (EPA). ACTION: Final rule. SUMMARY: The Environmental Protection Agency (EPA) is finalizing approval of State Implementation Plan (SIP) revisions submitted by the State of Wyoming on April 5, 2018, addressing regional haze. The revisions modify the sulfur dioxide (SO 2 ) emissions reporting requirements for Laramie River Station Units 1 and 2. We are also finalizing revisions to the nitrogen oxides (NO X ) emission limits for Laramie River Units 1, 2 and 3 in the Federal Implementation Plan (FIP) for regional haze in Wyoming. The revisions to the Wyoming regional haze FIP also establish a SO 2 emission limit averaged annually across both Laramie River Station Units 1 and 2. These units are operated by, and owned in part by, Basin Electric Power Cooperative (Basin Electric). The EPA is taking this action pursuant to section 110 of the Clean Air Act (CAA). DATES: This rule is effective June 19, 2019. ADDRESSES: The EPA has established a docket for this action under Docket ID No. EPA-R08-OAR-2018-0606. All documents in the docket are listed on the http://www.regulations.gov website. Although listed in the index, some information is not publicly available, e.g., CBI or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the internet and will be publicly available only in…