The EPA Regional Administrator, Jared Blumenfeld signed the following

proposed rule on August 30 , 2012 and EPA is submitting it for p ublication in the Federal Register (FR). While we have taken steps to ensure the accuracy of this Internet version of the proposed rule, it is not the official version of the proposal for purposes of public comment. Please refer to the official version in a forthcoming FR publication appearing on the Government Printing Office’s FDsys website, http://fdsys.gpo.gov/fdsys/search/home.action and on Regulation.gov in Docket Number EPA
- R09
- OAR
- 2011
- 0 4 92 , http://www.regulations.gov Billing Code: 6560
- 50
- P ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52 [ EPA - R09 - OAR - 2011 - 0 492 ; FRL – ] Approval and Promulgation of Implementation Plans; California; Determination s of Attainment for the 1997 8 - Hour Ozone Standard
AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing determinations relating to 1997 8
- hour ozone nonattainment areas in California. First, EPA is proposing to determin e that six 8
- hour ozone nonattainment areas in California ( Amador and Calaveras Counties, Chico , Kern County, Mariposa and Tuolumne Counties, Nevada County, and Sutter County ) ("six CA areas" ) attained the 1997 8
- hour ozone national ambient air qua lity standard (NAAQS) by their applicable attainment dates. Second, in making these proposed determinations for Mariposa and Tuolumne Counties and Nevada County , EPA is also proposing to grant them one
- year attainment date extensions. Lastly, EPA is propos ing to determine that the six CA areas and the Ventura County 8
- hour ozone nonattainment area in C A have attained and continue to attain the 1997 8
- hourThis document is a prepublication version signed by EPA Regional

Administrator Jared Blumenfeld on August 30 , 2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

2 ozone NAAQS based on the most recent three years of data. Under the provisions of EPA's ozone implement ation rule, these proposed determinations suspend the requirements for these areas to submit revisions to the state implementation plan related to attainment of the 1997 8
- hour ozone standard for as long as the se areas continue to meet the 1997 8
- hour ozon e NAAQS. DATES: Written comments must be received on or before [ FEDERAL REGISTER OFFICE: Insert date 30 days after date of publication in the Federal Register ]. ADDRESSES: Submit comments, identified by docket number EPA
- R09
- OAR
- 2011
- 0 492 , by one of the following methods: 1. Federal eRulemaking Portal, at www.regulations.gov , please follow the on
- line instructions ; 2. E - mail to ungvarsky.john@epa.gov ; or 3. Mail or delivery to John Ungvarsky , Air Planning Office, AIR - 2, U.S. Environmental Protection Agency, Region IX, 75 Hawthorne Street, San Francisco, California 94105
- 3901 . Please see the direct final rule which is located in the Rules section of this Federal R egister for detailed instructions on how to submit comments. FOR FURTHER INFORMATION CONTACT: John Ungvarsky, (415) 972
- 3963, or by email at ungvarsky.john@epa.gov .This document is a prepublication version signed by EPA Regional

Administrator Jared Blumenfeld on August 30 , 2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

3 SUPPLEMENTARY INFORMATION : For further information, please see the direct final action, of the same title, which is located in the Rules section of this Federal Register . EPA is approving : the determinations of attainment by applicable attainment dates; attainment date extensions; and determinations of continued attainment as a direct final rule without prior proposal because EPA views th ese as noncontroversial action s and anticipates no adverse comments. A detailed rationale for the se actions is set forth in the preamble to the dir ect final rule. If EPA receives no adverse comments, EPA will not take further action on this proposed rule. If EPA receives adverse comments, EPA will withdraw the direct final rule , and it will not take effect. EPA will address all public comments in a s ubsequent final rule based on this proposed rule. 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 we receive adverse comment on an amendment, paragraph, or section of thisThis document is a prepublication version signed by EPA Regional

Administrator Jared Blumenfeld on August 30 , 2012. We have taken steps to ensure the accuracy of this version, but it is not the official version.

4 rule and if that provision may be severed from the remainder of the rule, EPA may adopt as final those provisions of the rule that are not the subject of an adverse comment.

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____ ____________________ Dated : Jared Blumenfeld Regional Administrator, EPA Region IX.