March 2, 2015

MEMORANDUM SUBJECT: Extending Comment Period for EPA

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- 016 9 FROM: Robin Langdon

Health and Environmental Impacts Division Office of Air Quality Planning and Standards, Office of Air and Radiation U.S. Environmental Protection Agency
Thr u: Darryl Weatherhead

Group Leader , Health and Environmental Impacts Division Office of Air Quality Planning and Standards, Office of Air and Radiation U.S. Environmental Protection Agency TO: EPA Docket Office
Docket number EPA

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- 0169 is open for comments on the R egulatory Impact Analysis of the Proposed Revisions to the National Ambient Air Quality Standards for Ground

- Level Ozone

. The docket is currently open for public comment from December 5 , 2014 , to March 5 , 2015

. The agency is exten ding the comment period to March 17 , 2015. As indicated in the memo opening the docket, s ubmit your comments, identified by Docket ID No. EPA

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- 0169 , by one of the following methods :
 www.regulations.gov : Follow the on - line instructions for submitting comments.

 Email: a - and

- r - Docket@epamail.epa.gov

. Include docket ID No. EPA

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- 0169 in the subject line of the message.

 Fax: (202) 566

- 9744.

 Mail: Enviro nmental Protection Agency, EPA Docket Center (EPA/DC), Mail Code: 28221T, Attention Docket ID No. EPA

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- 0169, 1200 Pennsylvania Ave. NW, Washington, DC 20460.

 Hand/Courier Delivery : EPA Docket Center, Room 3334, EPA WJC West Building, 1301 Const itution Avenue NW, Washington, DC 20004, Attention Docket ID No. EPA

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- 0169. Such deliveries are only accepted during the Docket’s normal hours of operation, and special arrangements should be made for deliveries of boxed information. EPA’s poli cy is that all comments received 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 commen t includes information claimed to beConfidential Business Information (CBI) or other information whose disclosure is

restricted by statute. Do not submit information that you consider to be CBI or otherwise protected through http://www.regulations.gov or e - mail. The http://www.regulations.gov Web site is an ‘‘anonymous access’’ system, which means 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 without going through http://www.regulations.gov , your e - mail address will be automatically captured and included as part of the comm ent that is placed in the public docket and made available on the Internet. If you submit an electronic comment, EPA recommends that you include your name and other contact information in the body of your comment and with any disk or CD

– ROM you submit. 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. Electronic files should avoid the use of special characters, avoid any form of encryption, and be free of any defects or viruses. For additional information about EPA’s public docket, visit the EPA Docket Center homepage at http://www.epa.gov/epahome/dockets.htm

. Should you have any questions regarding this memorandum, please contact Eric Shultz at ( 202 ) 566

- 1883 , or via email at schultz.eric@epa.gov

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