Jared Blumenfeld, Regional Administrator, EPA Region 9 signed the following proposed rule on December 18, 

2014, and EPA is submitting it for publication 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 proposed rule for purposes 

of public comment. Please refer to the official version in a forthcoming FR publication, which will appear on the 

Government Printing Office's FDsys website (http://fdsys.gpo.gov/fdsys/search/home.action) and on 

Regulations.gov (http://www.regulations.gov) in Docket No. EPA-R09-OAR-2014-0708. 

6560-50-P 

ENVIRONMENTAL PROTECTION AGENCY 

40 CFR Part 52 

[EPA-R09-OAR-2014-0708; FRL - ] 

Clean Data Determination for 1997 PM2.5 Standards; California - 

South Coast; Applicability of Clean Air Act Requirements; 

Extension of Comment Period 

AGENCY: Environmental Protection Agency (EPA). 

ACTION: Proposed rule; extension of comment period. 

---------------------------------------------------------------- 

SUMMARY: EPA is extending the existing public comment period for 

a proposal published in the Federal Register on December 9, 

2014. In that action, pursuant to the Clean Air Act, EPA 

proposed to determine that the Los Angeles-South Coast Air Basin 

(South Coast) air quality planning area in California has 

attained the 1997 annual and 24-hour fine particle (PM2.5) 

National Ambient Air Quality Standards. This proposed 

determination is based upon complete (or otherwise validated), 

quality-assured, and certified ambient air monitoring data 

showing that the area has monitored attainment of the 1997 

annual and 24-hour PM2.5 standards based on the 2011–2013 

monitoring period. If the EPA finalizes this determination of 

attainment, the requirements for the area to submit certain 

State implementation plan revisions shall be suspended for so 
This document is a prepublication version, signed by Jared Blumenfeld, Regional Administrator, EPA Region 9 on 

November 20, 2014. We have taken steps to ensure the accuracy of this version, but it is not the official version. 

2 

long as the area continues to attain the 1997 annual and 24-hour 

PM2.5 standards. One commentor requested an extension of the 

comment period for this proposed rulemaking. EPA is now 

extending the public comment period for fourteen days. 

DATES: The comment period for the proposed rule published on 

December 9, 2014 (79 FR 72999) is extended. Comments must be 

received on or before January 22, 2015. 

ADDRESSES: Submit comments, identified by docket number EPAR09-OAR-2014-0708, by one of the following methods: 

· Federal eRulemaking Portal: http://www.regulations.gov. 

Follow the on-line instructions for submitting comments. 

· E-mail: tax.wienke@epa.gov. 

· Mail or deliver: Wienke Tax, Air Planning Office, U.S. 

Environmental Protection Agency, Region 9, Mailcode AIR-2, 

75 Hawthorne Street, San Francisco, California 94105-3901. 

Instructions: All comments will be included in the public 

docket without change and may be made available online at 

http://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 restricted by statute. Information that you 

consider CBI or otherwise protected should be clearly identified 

as such and should not be submitted through 
This document is a prepublication version, signed by Jared Blumenfeld, Regional Administrator, EPA Region 9 on 

November 20, 2014. We have taken steps to ensure the accuracy of this version, but it is not the official version. 

3 

http://www.regulations.gov or e-mail. The 

http://www.regulations.gov Web site is an “anonymous access” 

system, and EPA will not know your identity or contact 

information unless you provide it in the body of your comment. 

If you send an e-mail comment directly to EPA, your e-mail 

address will be automatically captured and included as part of 

the public comment. If EPA cannot read your comment due to 

technical difficulties and cannot contact you for clarification, 

EPA may not be able to consider your comment. 

Docket: The index to the docket for this action is 

available electronically on the http://www.regulations.gov Web 

site and in hard copy at EPA Region IX, 75 Hawthorne Street, San 

Francisco, California, 94105. While all documents in the docket 

are listed in the index, some information may be publicly 

available only at the hard copy location (e.g., copyrighted 

material), and some may not be publicly available at either 

location (e.g., CBI). To inspect the hard copy materials, please 

schedule an appointment during normal business hours with the 

contact listed in the FOR FURTHER INFORMATION CONTACT section 

below. 

FOR FURTHER INFORMATION CONTACT: Wienke Tax, Air Planning 

Office, U.S. Environmental Protection Agency, Region 9, Mail 

Code AIR-2, 75 Hawthorne Street, San Francisco, California 

94105-3901, 415-947-4192, tax.wienke@epa.gov. 
This document is a prepublication version, signed by Jared Blumenfeld, Regional Administrator, EPA Region 9 on 

November 20, 2014. We have taken steps to ensure the accuracy of this version, but it is not the official version. 

4 

SUPPLEMENTARY INFORMATION: EPA published a proposed rule in the 

Federal Register on December 9, 2014 (79 FR 72999). EPA is 

extending the existing public comment period for that proposal. 

In that action, pursuant to the Clean Air Act, EPA proposed to 

determine that the Los Angeles-South Coast Air Basin (South 

Coast) air quality planning area in California has attained the 

1997 annual and 24-hour fine particle (PM2.5) National Ambient 

Air Quality Standards. This proposed determination is based upon 

complete (or otherwise validated), quality-assured, and 

certified ambient air monitoring data showing that the area has 

monitored attainment of the 1997 annual and 24-hour PM2.5

standards based on the 2011–2013 monitoring period. If the EPA 

finalizes this determination of attainment, the requirements for 

the area to submit certain State implementation plan revisions 

shall be suspended for so long as the area continues to attain 

the 1997 annual and 24-hour PM2.5 standards. One commentor 

requested an extension of the comment period for this proposed 

rulemaking. EPA is now extending the public comment period for 

fourteen days for the December 9, 2014, proposed clean data 

determination for the 1997 PM2.5 standards for the South Coast 

area, California. 

December 18, 2014_________ _______/s/_______________ 

Dated: Jared Blumenfeld, 

Regional Administrator, 

EPA Region 9.