ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52 

### [EPA-R07-OAR-2010-0156; FRL ] Approval and Promulgation of Implementation Plans; State of Iowa AGENCY: Environmental Protection Agency (EPA) . ACTION: Proposed rule. SUMMARY: The EPA proposes to approve a revision to the Iowa State Implementation Plan (SIP) . The purpose of this revision is to update the Polk County Board of Health Rules and Regulations, Chapter V, "Air Pollution." These revisions reflect updates to the,Iowa statewide rules previously approved by EPA and will ensure consistency between the applicable local agency rules and Federally-approved rules. This rulemaking also ensures Federal enforceability of the applicable parts of the local agency's "Air Pollution" rules. DATES: Comments on this proposed action must be received in writing by [ insert date 30 days fromthe date of publication in the Federal Register] . ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R07-OAR-2010-0156 by one of the following methods: 1 . http://www .regulations.gov: Followthe on-line instructions for submitting comments. 2. E-mail : casburn.tracey@epa.gov. 3. Mail : Tracey Casburn, Environmental Protection Agency, Air2

Planning and Development Branch, 901 North 5th Street, Kansas City, Kansas 66101 . 4. Hand Delivery or Courier : Deliver your comments to Tracey Casburn, Environmental Protection Agency, Air Planning and Development Branch, 901 North 5th Street, . Kansas City, Kansas 66101 . Such deliveries are only accepted during the Regional office's normal hours of operation. The Regional Office's official hours of business is Monday through Friday, 8:00 to 4:30, excluding legal holidays. 

### Please see the direct final rule which is located in the Rules section of this Federal Register~for detailed instructions on howto submit comments. FOR FURTHER INFORMATION CONTACT: Tracey Casburn at (913) 551- 7016, or by e-mail at casburn.tracey@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

### 3

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: V ( ~~1 ~



### June 18, 2010. Karl Brooks, Regional Administrator, Region 7.