ENVIRONMENTAL PROTECTION AGENCY 40 CFRPart 52 (EPA-R08-0AR-2009-0790); FRL- Approval and Promulgation ofAir Quality Implementation Plans; Colorado; Revisions to Regulation Number 1
AGENCY: EnvirOlunental Protection Agency (EPA). ACTION: Proposed Rule SUMMARY: EPA is proposing to approve State Inlplenlentation Planrevisions submitted by the State ofColorado onAugust 3, 2007 to Colorado's RegulationNunlber 1 (revisions to the perfonllance testing requirel11ents for air curtain destnlctors). Colorado adopted these rule revisions on October 2, 2006. All other actions subnlitted by the State ofColorado concurrent with Colorado'sRegulation NWllber 1revision request will be acted on at a later date. 

### 1n the '"Rules and Regulations" section ofthis Federal Register, EPA is approving the State's SIP revision as a direct final rule without priorproposal because the Agency views this as a 11oncontroversial SIP revision and anticipates no adverse comnlents. A detailed rationale for the approval is set forth in the preatnble to the direct final rule. IfEPA receives no adverse C0111nlents, EPA will not take ftu1her action onthis proposed rule. IfEPA receives adverse cOlnnlents, EPA will withdrawthe direct tinal rule and it will not take effect. EPA will address all public comnlents in a subsequent final rule based on this proposed rule. EPA will not institute a second conunentperiod on this action. Any parties interested in conUl1enting must do
so at this tilne. Please note that ifEPAreceives adverse conlment on an alnendlnent, paragraph.
or section ofthis rule and ifthat provision may be severed from the renlainder ofthe rule, EPAnlay adopt as final those provisions ofthe rule that are not the subject ofan adverse COIU111ent. DATES: C0111lnents lnustbe received on orbefore [insert date 30 days after publication in the Federal Register]. ADDRESSES: Submit your conunents, identified by Docket ID No. EPA-R08-0AR-2009­ 0790, by one ofthe followingnlethods:
• www.reQ:ulatiol1s.gov. Followthe on-line instrw;tiol1s for subll1itting COlll111ents.
• E-nlail: videtich.callie(@epa.gov and leone.kevin(iVepa.gov
• Fax: (303) 312-6064 (please alert the individual listed in the FOR FURTHER INFORMATION CONTACT ifyou are faxing conlnlents).
• Mail: Callie A. Videtich, Director, AirProgram, Environnlental Protection Agency (EPA). Region 8, Mailcode 8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202­ 1129.
• Hand Delivery: Callie A. Videtich, Director, AirProgranl, Environnlental Protection Agency (EPA), Region 8, Mailcode 8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202-1129. Such deliveries are only accepted Monday throughFriday, 8:00 a.nl. to 4:30 p.nl., excluding Federal holidays. Special alTangenlents should be ll1ade for deliveries ofboxed infomlatiol1. Instructions: Direct your conUllents to Docket ID No. EPA-R08-0AR-2009-0790. EPA's policy is that all comnlents received will be included inthe public docket without change and nlay be made available online at v-.rww.regulations.Q:ov, including any personal infon11ation provided, unless the C01111nent includes infomlation clainledto be Confidential Business Info1111ation (CBI) or otherinformation whose disclosure is restricted by statute. Do not subn1it infonnationthat you considerto be CBI or otherwise protectedthroughwww.regulations.gov or 

### 2e-n1ail. The www.reQulations.gov web site is an ·'anonyn10us access" system. \vhich means EPA will not know youridentity or contact infonnation unless you provide it in the body ofyour con1nlent. Ifyou send ane-mail conm1ent directly to EPA, without going through Vvww.regulations.gov, your e-mail address will be auton1atically captured and included as part of
. the COll1n1ent that is placed in the public docket and n1ade available onthe Inten1et. Ifyou subn1it
an electronic con1n1ent, EPA reconu11ends that youinclude yournaIne and other contact infonnationin the body ofyour COlnment and with any disk or CD-ROM you subn1it. IfEPA cmmotread your con1n1ent due to technical difficulties and cannot contact you for clarification, EPA n1ay not be able to consideryour con1n1ent. Electronic files should avoid the use ofspecial characters, any fonn ofencryption, and be free ofany defects or viruses. For additional infonnation about EPA's public docket visit the EPA Docket Center hon1epage at http://wwvv.epa.Q:ov/epahon1e/dockets.htn1. Foradditional instructions on subnlitting C0111n1ents, go to Section 

### 1. General Infonnation ofthe 

### SUPPLEMENTARY INFORMATION section of this docun1ent. 

### Docket: All docun1ents in the docket are listed in the ww\v.regulations.gov index. Although listed in the index, some infonnation is not publicly available, e.g., CBI qr other infonnationwhose disclosure is restricted by statute. Certain othermaterial, such as copyrighted material, will be publicly available only in hard copy. Publicly-available docket nlateria]s are available either electronically in www.regulations.Q:ov or in hard copy at the Air Program. Environlnental Protection Agency (EPA), Region 8. 1595 Wynkoop Street. Denver, Colorado 80202-1129. EPA requests that ifat all possible, you contact the individual listed in the 

### FOR FURTHERINFORMATION CONTACT section to viewthe hard copy ofthe docket. You n1ay view the hard copy ofthe docket Monday throughFriday, 

### 8:00 a.ll1. to 

### 4:00 p.m., excluding 

### 3Federal holidays. 

### FORFURTHER INFORMATION CONTACT: Kevin**Leone~** AirPrograIll, Mailcode 8PAR, EnvirolU11entai Protection Agency, Region 8, 1595 Wynkoop**Street~** Denver, Colorado 80202-1129, (303) 312-6227, or leone.kevin@,epa.gov.



### 4IDENTIFICATION OF DOCUl\1ENT: Approval and Promulgation ofAir Quality Implementation Plans; Colorado; Revisions to Regulation Number 1. Proposed Rule. (EPA-R08-OAR-2009-0790) Page 5 of5 SUPPLEMENTARYINFORMATION: 

### See the infomlationprovided in the Direct Final action ofthe sanle title which is located in the Rules and Regulations section ofthis Federal Register. Authority: 

### 42 U.S.C. 7401 et seq.

Dated: Carol Rushin Acting Regional Administrator Region 8

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