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Proposed Rule

Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Revisions to Regional Haze State Implementation Plan; Revisions to Regional Haze Federal Implementation Plan

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Environmental Protection Agency (EPA).


Proposed rule; extension of comment period.


On October 11, 2018, the Environmental Protection Agency (EPA) published in the Federal Register a proposed rule pertaining to revisions to the regional haze State Implementation Plan (SIP) and Federal Implementation Plan (FIP) for Wyoming and requested comments by November 13, 2018. The EPA is extending the comment period for the proposed rule until December 10, 2018.


Written comments must be received on or before December 10, 2018.


Submit your comments, identified by Docket ID No. EPA-R08-OAR-2018-0606, to the Federal Rulemaking Portal: Follow the online instructions for submitting comments. Once submitted, comments cannot be edited or removed from The EPA may publish any comment received to its public docket. Do not submit electronically any information you consider to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Multimedia submissions (audio, video, etc.) must be accompanied by a written comment. The written comment is considered the official comment and should include discussion of all points you wish to make. The EPA will generally not consider comments or comment contents located outside of the primary submission (i.e., on the web, cloud, or other file sharing system). For additional submission methods, the full EPA public comment policy, information about CBI or multimedia submissions, and general guidance on making effective comments, please visit​dockets/​commenting-epa-dockets.

Docket: All documents in the docket are listed in the index. 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, will be publicly available only in hard copy. Publicly available docket materials are available either electronically in or in hard copy at the Air Program, Environmental Protection Agency (EPA), Region 8, 1595 Wynkoop Street, Denver, Colorado 80202-1129. The EPA requests that, if at all possible, you contact the individual listed in the FOR FURTHER INFORMATION CONTACT section to view the hard copy of the docket. You may view the hard copy of the docket Monday through Friday, 8:00 a.m. to 4:00 p.m., excluding federal holidays.

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Jaslyn Dobrahner, Air Program, EPA, Region 8, Mailcode 8P-AR, 1595 Wynkoop Street, Denver, Colorado, 80202-1129, (303) 312-6252,

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Throughout this document wherever “we,” “us,” or “our” is used, we mean the EPA.

On October 11, 2018 (83 FR 51403), we published in the Federal Register a proposed rule pertaining to revisions to the regional haze SIP and FIP for Wyoming and requested comment by November 13, 2018. Specifically, the SIP revisions modify the sulfur dioxide (SO2) emissions reporting requirements for Laramie River Station Units 1 and 2. The revisions to the FIP revise the nitrogen oxides (NOX) best available retrofit technology (BART) emission limits for Laramie River Units 1—3 and establish a SO2 emission limit averaged annually across both Laramie River Station Units 1 and 2.

We received a request from several organizations to extend the comment period and, in response, we are extending the comment period to December 10, 2018.[1]

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List of Subjects in 40 CFR Part 52

  • Environmental protection
  • Air pollution control
  • Incorporation by reference
  • Intergovernmental relations
  • Nitrogen dioxide
  • Particulate matter
  • Sulfur oxides
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Authority: 42 U.S.C. 7401 et seq.

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Dated: November 2, 2018.

Douglas Benevento,

Regional Administrator, Region 8.

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1.  A copy of the letter requesting the extension appears in the docket for this action.

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[FR Doc. 2018-24366 Filed 11-6-18; 8:45 am]