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###### Environmental Protection Agency

          - 40 CFR Part 52
          - [EPA-R07-OAR-2010-0168; FRL-9271-4]

# AGENCY:

Environmental Protection Agency (EPA).

# ACTION:

Proposed rule.

# SUMMARY:

EPA proposes to approve the State Implementation Plan (SIP) revision submitted by the state of Missouri to add two new rules which implement restrictions on the idling of heavy duty diesel vehicles in the Kansas City Metropolitan Area and in the St. Louis Ozone Nonattainment Area. EPA is proposing this revision because the standards and requirements set by the rules will strengthen the Missouri SIP. EPA's approval of this SIP revision is being done in accordance with the requirements of the Clean Air Act (CAA).

# DATES:

Comments on this proposed action must be received in writing by March 31, 2011.

# ADDRESSES:

                        Submit your comments, identified by Docket ID No. EPA-R07-OAR-2010-0168, by mail to Amy Bhesania, Environmental Protection Agency, Air Planning and Development Branch, 901 North 5th Street, Kansas City, Kansas 66101. Comments may also be submitted electronically or through hand delivery/courier by following the detailed instructions in the                         **ADDRESSES**                         section of the direct final rule located in the rules section of this                         **Federal Register**                        .                    

# FOR FURTHER INFORMATION CONTACT:

                        Amy Bhesania at (913) 551-7147, or by e-mail at                         *bhesania.amy@epa.gov*.                    

# SUPPLEMENTARY INFORMATION:

                    In the final rules section of the                     **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 revision amendment and anticipates no relevant adverse comments to this action. A detailed rationale for the approval is set forth in the direct final rule. If no relevant adverse comments are received in response to this action, no further activity is contemplated in relation to this action. If EPA receives relevant adverse comments, the direct final rule will be withdrawn and all public comments received will be addressed in a subsequent final rule based on this proposed action. 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 EPA receives adverse comment on part of this rule and if that part can be severed from the remainder of the rule, EPA may adopt as final those parts of the rule that are not the subject of an adverse comment. For additional information, see the direct final rule which is located in the rules section of this                     **Federal Register**                    .                

Dated: February 16, 2011.

Karl Brooks,

Regional Administrator, Region 7.

[FR Doc. 2011-4371 Filed 2-28-11; 8:45 am]

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