ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 81 [EPA - R03 - OAR - 2010 - 0431 ; FRL - ] Approval of One - Y ear Extension for Attaining the 1997 8 - Hour Ozone Standard in the

Baltimore Moderate Nonattainment Area AGENCY: Environmental Protection Agency (E PA). ACTION: Proposed rule. SUMMARY: EPA is proposing to extend the attainment date from June 15, 2010 to June 15, 2011 for the Baltimore nonattainment area, which is classified as moderate for the 1997 8
- hour ozone national ambient air quality standar d (NAAQS)
. This extension is based in part on air quality data for the 4 th highest daily 8
- hour monitored value during the 2009 ozone season
. In the Final Rules section of this Federal Register , EPA is appr oving the State's request as a direct final rule without prior proposal because the Agency views this as a noncontroversial request and anticipates no adverse comments. A detailed rationale for the approval is set forth in the direct final rule. If no adverse comments are received in response to this action, no fur ther activity

is contemplated. If EPA receives adverse comments, the direct final rule will be withdrawn and all public comments received will be addressed in a subsequent final rule based on this proposed rule.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 sec ond comment period. Any parties interested in commenting on this action should do so at this time.

DATES: Comments must be received in writing by [ insert date 30 day s from date of publication
. ]2

ADDRESSES: Submit y our comments, identified by Doc ket I D Number EPA - R03 - OAR 2010 - 0431 by

one of the following methods: A. www.regulations.gov . Follow the on
- line instructions for submitting comments. B. E
- mail: fernandez.cristina@epa.gov
. C. Ma il: EPA - R03 - OAR - 2010 - 0431 , Cristina Fernandez, Associate Director , Office of Air Program Planning, Mailcode 3AP30, U.S. Environmental Protection Agency , Region I II, 1650 Arch Street, Philadelphia, Pennsy lvania 19103. D. Hand Delivery : At the previously
- listed EPA Region I II address. Such deliveries are only accepted during the Docket = s normal hours of operation, and special arrangements should be made for deliveries of boxed information.

Instructions: Direct y our comments to Docket I D No. EPA - R03 - OAR - 2010 - 0431 . EPA's policy is that all comments received will be included in the public docket without change, and may be made available online at www.regulations.gov , including any personal information provided, unless the comment includes information clai med to be Confidential Business In formation (CBI ) or other information whose disclosure is restricted by statute. Do not submit information that y ou consider to be CBIor otherwise protected through www.regulations.gov or e - mail. The www.regulations.gov w ebsite is an A anony mous access @ sy stem, which means EPA will not know y our identity or contact information unless y ou provide it in the body of y our comment. I f y ou send an e
- mail comment directly to EPA without going through www.regulations.gov , y our e - mail address will be automatically captured and included as part of the comment that is placed in the public docket and made available on the I nternet. I f y ou submit3

an electronic comment, EPA recommends that y ou include y our name and other contact inform ation in the body

of y our comment and with any disk or CD
- ROM y ou submit. I f EPA cannot read y our comment due to technical difficulties and cannot contact you for clarification, EPA may not be able to consider y our comment. Electronic files should avoid the use of special characters, any

form of encry

ption, and be free of any

defects or viruses.

Docket: All documents in the electronic docket are listed in the www.regulations.gov index. Although listed in the index, some information is not publicly avai lable, i.e., CBI

or other information whose disclosure is restricted by statute. Certain other material, such as copy righted material, is not placed on the I nternet and will be publicly available only

in hard copy

form. Publicly available docket material s 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 I II, 1650 Arch Street, Philadelphia, Pennsy lvania 19103
. Copies of the S tate submittal are available at Mary land Department of the Environment, 1800 Washington Boulevard, Suite 705, Baltimore, Maryland 21230
.
FOR FURTHER INFORMATION CONTACT : Gregory Becoat, (215) 814
- 2036, or by e mail at becoat.gregory @epa.gov.

SUPPLEMENT ARY INFORMATION: For further information, please see the information provided in the direct fi nal action, with the4

same title that is located in the A Rules and Regulations @ section of this Federal Register publication.

__ July 6, 2010 ________ ___________ /s/

_____________ Dated: W. C. Early , Acting Regional Administrator, Region I II.