6560.50 

ENVIRONMENTAL PROTECTION AGENCY 

40 CFR Part 52 

[EPA-R08-0RA-2009-0052; FRL-9136-5] 

Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Revisions to 

the Wyoming Air Quality Standards and Regulations 

AGENCY: Environmental Protection Agency (EPA). 

ACTION: Proposed Rule 

SUMMARY: EPA is proposing to approve two State Implementation Plan (SIP) revisions 

submitted by the State of Wyoming on September 11, 2008. Wyoming has revised its Air Quality 

Standards and Regulations, specifically Chapter 1, Section 5, Unavoidable equipment 

malfunction, and Chapter 1, Section 6, Credible evidence. EPA is taking this action under 

section 110 of the Clean Air Act. 

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 not take 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. Please note that if EPA receives adverse comment on an amendment, paragraph, 

or section of this rule and if that provision may be severed from the remainder of the rule, EPA 

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may adopt as final those provisions of the rule that are not the subject of an adverse comment.
 

DATES: Written comments must be received on or before [insert date 30 days after
 

publication in the Federal Register].
 

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R08-0AR-2009­


0052, by one of the following nlethods:
 

•	 http://www.regulations.gov. Follow the on-line instructions for submitting 

comments. 

•	 E-mail: dolan.kathy@epa.gov 

•	 Fax: (303) 312-6064 (please alert the individual listed in the FOR FURTHER 

INFORMATION CONTACT if you are faxing comments). 

•	 Mail: Director, Air Program, Environmental Protection Agency (EPA), Region 8, 

Mai1code 8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202-1129. 

•	 Hand Delivery: Director, Air Program, Environmental Protection Agency (EPA), 

Region 8, Mailcode 8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202­

1129. Such deliveries are only accepted Monday through Friday, 8:00 a.m. to 

4:30 p.m., excluding Federal holidays. Special arrangements should be made for 

deliveries of boxed information. 

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: Kathy Dolan, Air Program, U.S. 

Environmental Protection Agency (EPA), Region 8, Mailcode 8P-AR, 1595 Wynkoop Street, 

Denver, Colorado 80202-1129. 303-312-6142, dolan.kathy@epa.gov 

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SUPPLEMENTARY INFORMATION: See the infornlation 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.
 

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Dated: Carol L. Carnpbell 

Acting Deputy Regional Administrator 

Region 8 

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