ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R03-OAR-2010-O010; FRL Approval and Promulgation ofAir Quality Implementation Plans; Maryland; Control ofCarbon Monoxide Emissions from Basic Oxygen Furnaces
AGENCY: Environmental Protection Agency (EPA). ACTION: Proposedrule. SUMMARY: EPA proposes to approve the State Implementation Plan (SIP) revisiOn submitted by the State ofMarylandfor the purpose ofreplacing the existing requirements forthe control of carbon monoxide (CO) emissions from basic oxygen furnaces (BOFs) at steel mills with anew CO standard forBOFs at steel mills. In the Final Rules section ofthis Federal Register, EPA is approving the States SIP submittal as a direct final rule withoutpriorproposal becausethe Agency views this as a noncontroversial submittal and anticipates no adverse comments. A detailedrationale for the approval is set forth inthe direct final rule. Ifno adverse comments are received in response to this action, no further activity is contemplated. IfEPA receives adverse comments, the direct final rule will be withdrawn and all public comments received will be addressed in a subsequent final rule based on this proposed rule. EPA will not institute a second commentperiod. Any parties interested in commenting on this action should do so atthis time.

DATES: Comments mustbe received in writing by [insert date 30 days from date of publication.]

ADDRESSES: Submityour comments, identified by DocketID NumberEPA-R03-OAR2010-0010 by one ofthe following methods:A. www.regulations.gov. Follow the on-line instructions for submitting comments. B. E-mail: fernandez.cristinaepa.gov C. Mail: EPA-R03-OAR-20 10-0010, CristinaFernandez, Associate Director, Office ofAir Program Planning, Mailcode 3AP30, U.S. Environmental Protection Agency, Region III, 1650 Arch Street, Philadelphia, Pennsylvania 19103. D. Hand Delivery: At the previously-listed EPA Region III address. Such deliveries are only accepted duringthe Docket’s normal hours ofoperation, and special arrangements should be made for deliveries ofboxed information.

Instructions: Direct your comments to DocketID No. EPA-R03-OAR-2010-OOlO. EPAs policy is that all comments received will be included in the public docketwithout change, and may be made available online at www.regulations.gov, including any personal information provided, unless the comment includes information claimed to be Confidential Business Information (CBI) or other information whose disclosure is restrictedby statute. Do not submit information thatyou considerto be CBI or otherwise protected through www.regulations.gov or e-mail. The www.regulations.gov website is an “anonymous access” system, which means EPA -will-not know-your-identity-or-contact-information unless you provide-it-inthe bodyof_your comment. Ifyou send an e-mail comment directly to EPA without going through www.regulations.gov, your e-mail address will be automatically captured and included as part of the commentthat is placed inthe public docket and made available onthe Internet. Ifyou submit
an electronic comment, EPA recommends that you include your name and other contact informatIon in the body ofyour comment and with any disk or CD-ROM you submit. IfEPA cannotread your comment due to technical difficulties and cannot contactyou for clarification,

2EPA may notbe able to consider your comment. Electronic files should avoid the use ofspecial characters, any form ofencryption, and be free ofany defects or viruses.

Docket: All documents inthe electronic docket are listed inthe www.regulations.gov index. Although listed in the index, some information is notpublicly available, i.e., CBI or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is notplaced on the Internet and will be publicly available only in hard copy form. Publicly available docketmaterials are available either electronically in www.regulations.gov or in hard copy during normal business hours at the Air Protection Division, U.S. Environmental Protection Agency, Region III, 1650 Arch Street, Philadelphia, Pennsylvania 19103. Copies of the State submittal are available at Maryland Department ofthe Environment, 1800 Washington Boulevard, Suite 705, Baltimore, Maryland 21230.
FOR FURTHER INFORMATION CONTACT: MariaA. Pino, (215) 814-2181, orbye-mail. at pino.mariaepa.gov.

3SUPPLEMENTARY INFORMATION: For further information on this SIP revision, which replaces the existing requirements for CO emissions from BOFs at steel mills with anewregulation that establishes anew, equivalent CO standard for BOFs in steel mills in Maryland, please see the informationprovided in the direct final action, with the same title, that is located inthe “Rules and Regulations” section ofthis Federal Registerpublication. W. C. arly, Acting Regional Administrator


### JAN 2 2 2010 Dated: ShawnM. Garvin, Regional Admini Region III.

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