Document ID: EPA-R08-OAR-2014-0187-0001
Agency: epa
Document Type: Proposed Rule
Title: Air Quality State Implementation Plans; Approvals and Promulgations: Wyoming;  Revisions to SO2 Ambient Standards
Posted Date: 2015-07-31T04:00Z

[Federal Register Volume 80, Number 147 (Friday, July 31, 2015)]
[Proposed Rules]
[Pages 45630-45631]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2015-18513]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R08-OAR-2014-0187; FRL-9931-36-Region 8]

Approval and Promulgation of Implementation Plans; Wyoming; 
Revisions to SO2 Ambient Standards

AGENCY: Environmental Protection Agency.

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to 
approve changes to Wyoming's State Implementation Plan (SIP) that 
update its ambient air quality standards with regard to the 1-hour 
sulfur dioxide (SO2) and the secondary SO2 
National Ambient Air Quality Standards (NAAQS). On February 7, 2014, 
the Wyoming Department of Environmental Quality (WDEQ) submitted to EPA 
revisions to the Wyoming SIP. Specifically, the State revised Wyoming 
Air Quality Standards and Regulations (WAQSR) Chapter 2, Section 4, 
``Ambient standards for sulfur oxides.'' In this action, EPA is 
proposing to approve some of the revisions provided in the February 
2014 SIP submission. This action is being taken in accordance with 
section 110 of the Clean Air Act (CAA).

DATES: Written comments must be received on or before August 31, 2015.

ADDRESSES: The EPA has established a docket for this action under 
Docket Identification Number EPA-R08-OAR-2014-0187. All documents in 
the docket are listed on the http://www.regulations.gov Web site. 
Although listed in the index, some information may not be publicly 
available, i.e., Confidential Business Information or other information 
the disclosure of which is restricted by statute. Certain other 
material, such as copyrighted material, is not placed on the Internet 
and will be publicly available only in the hard copy form. Publicly 
available docket materials are available either electronically through 
http://www.regulations.gov or in hard copy at EPA Region 8, Office of 
Partnership and Regulatory Assistance, Air Program, 1595 Wynkoop 
Street, Denver, Colorado 80202-1129. The EPA requests that you

[[Page 45631]]

contact the individual listed in the FOR FURTHER INFORMATION CONTACT 
section to view the hard copy of the docket. The Regional Office's 
official hours of business are Monday through Friday, 8:00 a.m.-4:00 
p.m., excluding federal holidays. An electronic copy of the State's SIP 
compilation is also available at http://www.epa.gov/region8/air/sip.html.
    Please see the Direct Final Rule which is located in the Rules 
Section of this Federal Register for detailed instruction on how to 
submit comments.

FOR FURTHER INFORMATION CONTACT: Kevin Leone, Air Program, EPA, Region 
8, Mailcode 8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202-1129, 
(303) 312-6227, leone.kevin@epa.gov.

SUPPLEMENTARY INFORMATION: In the ``Rules and Regulations'' section of 
this Federal Register, EPA is approving the State's SIP revision as a 
Direct Final Rule without prior proposal because the Agency views this 
as a noncontroversial SIP revision and anticipates no adverse comments. 
A detailed rationale for the approval is set forth in the preamble to 
the Direct Final Rule.
    If EPA receives no adverse comments, EPA will take no further 
action on this proposed rule. If EPA receives adverse comments, EPA 
will withdraw the Direct Final Rule and it will not take effect. EPA 
will address all public comments in a subsequent final rule based on 
this proposed rule.
    EPA will not institute a second comment period on this action. Any 
parties interested in commenting must do so at this time. For further 
information, please see the ADDRESSES section of this notice.
    Please note that if EPA receives an adverse comment on a distinct 
provision of this rule and if that provision may be severed from the 
remainder of the rule, EPA may adopt as final those provisions of the 
rule that are not the subject of an adverse comment. See the 
information provided in the Direct Final action of the same title which 
is located in the Rules and Regulations Section of this Federal 
Register.

    Authority:  42 U.S.C. 7401 et seq.

    Dated: July 1, 2015.
Shaun L. McGrath,
Regional Administrator, Region 8.
[FR Doc. 2015-18513 Filed 7-30-15; 8:45 am]
 BILLING CODE 6560-50-P