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-2010-0909; FRL-9240-9] 

# AGENCY:

Environmental Protection Agency (EPA). 

# ACTION:

Proposed rule; extension of the comment period.

# SUMMARY:

EPA is extending the comment period for a document published on November 19, 2010 (75 FR 70888). In the November 19, 2010 document, EPA proposed a finding that the Utah State Implementation Plan (SIP) is substantially inadequate to attain or maintain the national ambient air quality standards (NAAQS) or to otherwise comply with the requirements of the Clean Air Act (CAA), based on Utah's rule R307-107, which exempts emissions during unavoidable breakdowns from compliance with emission limitations. At the request of several commentors, EPA is extending the comment period through January 3, 2011. 

# DATES:

Comments must be received on or before January 3, 2011. 

# ADDRESSES:

Submit your comments, identified by Docket ID No. EPA-R08-OAR-2010-0909, by one of the following methods: 
      -  http://www.regulations.gov.                          Follow the on-line instructions for submitting comments.                                ( print page 79328)      
      - E-mail: russ.tim@epa.gov.
      -  Fax:                          (303) 312-6064 (please alert the individual listed in                          FOR FURTHER INFORMATION CONTACT                          if you are faxing comments).                     
      -  Mail:                          Callie Videtich, Director, Air Program, Environmental Protection Agency (EPA), Region 8, Mailcode 8P-AR, 1595 Wynkoop St., Denver, Colorado 80202-1129.                     
      -  Hand Delivery:                          Callie Videtich, Director, Air Program, Environmental Protection Agency (EPA), Region 8, Mail Code 8P-AR, 1595 Wynkoop St., Denver, Colorado 80202-1129. Such deliveries are only accepted Monday through Friday, 8 a.m. to 4:30 p.m., excluding Federal holidays. Special arrangements should be made for deliveries of boxed information.                     
      - For additional information on submitting comments, see the November 19, 2010 ( 75 FR 70888 ) proposed rule. 

# FOR FURTHER INFORMATION CONTACT:

                        Tim Russ, Air Program, Mail Code 8P-AR, Environmental Protection Agency (EPA), Region 8, 1595 Wynkoop St., Denver, Colorado 80202-1129, phone (303) 312-6479, or e-mail                         *russ.tim@epa.gov.*

Dated: December 13, 2010. 

Judith Wong, 

Acting Regional Administrator, Region 8.

[FR Doc. 2010-31892 Filed 12-17-10; 8:45 am] 

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