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###### Environmental Protection Agency

          - 40 CFR Part 81
          - [EPA-R08-OAR-2010-0749; FRL-9260-7]

# AGENCY:

Environmental Protection Agency (EPA).

# ACTION:

Proposed Rule.

# SUMMARY:

                        EPA is proposing to determine that the Columbia Falls and the Libby nonattainment areas in Montana attained the National Ambient Air Quality Standard for particulate matter with an aerodynamic diameter of less than or equal to a nominal ten micrometers (PM10) as of December 31, 1994.                    

# DATES:

Written comments must be received on or before March 2, 2011.

# ADDRESSES:

Submit your comments, identified by Docket ID No. EPA-R08-OAR-2010-0749, by one of the following methods:
      -  http://www.regulations.gov.                          Follow the on-line instructions for submitting comments.                    
      - E-mail: freeman.crystal@epa.gov.
      -  Fax:                          (303) 312-6064 (please alert the individual listed in the                          FOR FURTHER INFORMATION CONTACT                          if you are faxing comments).                    
      -  Mail:                          Callie Videtich, Director, Air Program, Environmental Protection                                ( print page 5324)                              Agency (EPA), Region 8, Mailcode 8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202-1129.                    
      -  Hand Delivery:                          Callie Videtich, 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:

                        Crystal Freeman, U.S. Environmental Protection Agency, Region 8, Air Program, Mail Code 8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202-1129, (303) 312-6602,                         *freeman.crystal@epa.gov.*

# SUPPLEMENTARY INFORMATION:

                    For further information, please see the direct final action, of the same title, which is located in the Rules section of this                     **Federal Register**                    . EPA is approving the attainment determination as a direct final rule without prior proposal because EPA views this as a noncontroversial action 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 on this action should do so at this time. Please note that if we receive 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 may adopt as final those provisions of the rule that are not the subject of an adverse comment.

# List of Subjects in 40 CFR Part 81

      - Environmental protection
      - Air pollution control
      - Intergovernmental relations
      - Particulate matter
      - Reporting and recordkeeping requirements

Dated: January 20, 2011.

James B. Martin,

Regional Administrator, Region 8.

[FR Doc. 2011-2120 Filed 1-28-11; 8:45 am]

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