Document Headings

                    Document headings vary by document type but may contain                    the following:                  
                -                       the agency or agencies that issued and signed a document                    
                -                       the number of the CFR title and the number of each part                      the document amends, proposes to amend, or is directly                      related to                    
                -                       the agency docket number / agency internal file number                    
                -                       the RIN which identifies each regulatory action listed in                      the Unified Agenda of Federal Regulatory and Deregulatory                      Actions                    

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###### Environmental Protection Agency

          - 40 CFR Parts 51 and 52
          - [EPA-HQ-OAR-2003-0064, FRL-9151-3]
          - RIN 2060-AP80

# AGENCY:

Environmental Protection Agency (EPA).

# ACTION:

Notice of extension of comment period.

# SUMMARY:

The EPA is announcing an extension of the public comment period on our proposed reconsideration of the Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation (April 15, 2010). The EPA is extending the comment period that originally closed on May 17, 2010, by an additional 30 days. The comment period will now close on June 16, 2010. The EPA is extending the comment period because of the requests we received, which are contained in the docket for this rulemaking.

# DATES:

*Comments.*                         Comments on the proposed rule published April 15, 2010 (75 FR 19567) must be received on or before June 16, 2010.                    

# ADDRESSES:

Submit your comments, identified by Docket ID No. EPA-HQ-OAR-2003-0064, by one of the following methods:
      -  http://www.regulations.gov . Follow the on-line instructions for submitting comments.                    
      - E-mail: a-and-r-docket@epamail.epa.gov. 
      -  Fax:                          202-566-1741.                    
      -  Mail:                          Attention Docket ID No. EPA-HQ-OAR-2003-0064, U.S. Environmental Protection Agency, EPA West (Air Docket), 1200 Pennsylvania Avenue, Northwest, Mailcode: 6102T, Washington, DC 20460. Please include a total of 2 copies.                    
      -  Hand Delivery:                          U.S. Environmental Protection Agency, EPA West (Air Docket), 1301 Constitution Avenue, Northwest, Room 3334, Washington, DC 20004, Attention Docket ID No. EPA-HQ-OAR-2003-0064. 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 your comments to Docket ID No. EPA-HQ-OAR-2003-0064. EPA's policy 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 comment includes information claimed to be Confidential 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 comment 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, any form of encryption, and be free of any defects or viruses. For additional instructions on submitting comments, go to the                         **SUPPLEMENTARY INFORMATION**                         section of this document.                    

*Docket:*                         All documents in the docket are listed in the                         *http://www.regulations.gov index.*                         Although listed in the index, some information is not publicly available,                         *e.g.,*                         CBI or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, will be publicly available only in hard copy. Publicly available docket materials are available either electronically in                         *http://www.regulations.gov*                         or in hard copy at the U.S. Environmental Protection Agency, Air Docket, EPA/DC, EPA West, Room 3334, 1301 Constitution Ave., NW., Washington, DC. The Public Reading Room is open from 8:30 a.m. to 4:30 p.m., Monday through Friday, excluding legal holidays. The telephone number for the Public Reading Room is (202) 566-1744, and the telephone number for the Air Docket is (202) 566-1742.                    

# FOR FURTHER INFORMATION CONTACT:

                        For general information, contact Dave Svendsgaard, Air Quality Policy Division, U.S. EPA, Office of Air Quality Planning and Standards (C504-03), Research Triangle Park, North Carolina 27711, telephone number (919) 541-2380, facsimile number (919) 541-5509, electronic mail e-mail address:                         *svendsgaard.dave@epa.gov*.                    

# SUPPLEMENTARY INFORMATION:

## I. General Information

### A. What should I consider as I prepare my comments for EPA?

                    1.                     *Submitting CBI.*                     Do not submit this information to EPA through                     *http://www.regulations.gov*                     or e-mail. Clearly mark the part or all of the information that you claim to be CBI. For CBI information in a disk or CD-ROM that you mail to EPA, mark the outside of the disk or CD-ROM as CBI and then identify electronically within the disk or CD-ROM the specific information that is claimed as CBI. In addition to one complete version of the comment that includes information claimed as CBI, a copy of the comment that does not contain the information claimed as CBI must be submitted for inclusion in the                           ( print page 27192)                        public docket. Information so marked will not be disclosed except in accordance with procedures set forth in 40 CFR part 2. Send or deliver information identified as CBI only to the following address: Roberto Morales, OAQPS Document Control Officer (C404-02), U.S. EPA, Research Triangle Park, NC 27711, Attention Docket ID No. EPA-HQ-OAR-2003-0064.                

                    2.                     *Tips for Preparing Your Comments.*                     When submitting comments, remember to:                
    - Identify the rulemaking by docket number and other identifying information (subject heading, Federal Register                      date and page number).                
    - Follow directions—The agency may ask you to respond to specific questions or organize comments by referencing a Code of Federal Regulations (CFR) part or section number.
    - Explain why you agree or disagree; suggest alternatives and substitute language for your requested changes.
    - Describe any assumptions and provide any technical information and/or data that you used.
    - If you estimate potential costs or burdens, explain how you arrived at your estimate in sufficient detail to allow for it to be reproduced.
    - Provide specific examples to illustrate your concerns, and suggest alternatives.
    - Explain your views as clearly as possible, avoiding the use of profanity or personal threats.
    - Make sure to submit your comments by the comment period deadline identified.

### B. Where can I get a copy of this document and other related information?

                    In addition to being available in the docket, an electronic copy of this notice will also be available on the World Wide Web (WWW). Following signature by the EPA Administrator, a copy of this notice will be posted in the regulations and standards section of our NSR home page located at                     *http://www.epa.gov/​nsr*.                

Dated: May 10, 2010.

Gina McCarthy,

Assistant Administrator, Office of Air and Radiation.

[FR Doc. 2010-11578 Filed 5-13-10; 8:45 am]

BILLING CODE 6560-50-P