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 from the 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 : Follow the on-line instructions 

for submitting comments . 

2 . E-mail : casburn .tracey@epa .gov . 

3 . Mail : Tracey Casburn, Environmental Protection Agency, Air 
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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 how to 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 
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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 .