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Child-Specific Exposure Factors Handbook

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Information about this document as published in the Federal Register.

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This document has been published in the Federal Register. Use the PDF linked in the document sidebar for the official electronic format.

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Environmental Protection Agency (EPA).


Notice of Re-opening of Public Comment Period.


EPA is re-opening the public comment period for the draft document titled, “Child-Specific Exposure Factors Handbook” (EPA/600/R-06/096A). The document was prepared by the National Center for Environmental Assessment within EPA's Office of Research and Development.

On October 6, 2006, EPA published a Federal Register notice (71 FR 59107) announcing a 60-day public comment period that ended December 5, 2006. EPA is re-opening the public comment period for an additional 30 days in response to requests to extend the comment period.Start Printed Page 2685

The Child-Specific Exposure Factors Handbook provides a summary of statistical data on various exposure factors used in assessing children's exposures. This Handbook serves as a resource for exposure assessors for calculating children's exposures. These factors include: drinking water consumption, soil ingestion and mouthing behavior, inhalation rates, dermal factors including skin surface area and soil adherence factors, consumption of retail and home-grown foods, breast milk intake, and activity pattern data. An interim final version of this handbook was published in 2002. The updated version provides analysis of exposure factors data using the age groups for children as recommended in the EPA document entitled, “Guidance on Selecting Age Groups for Monitoring and Assessing Childhood Exposures to Environmental Contaminants” (EPA/630/P-03/003F) (Available on line at​ncea/​cfm/​recordisplay.cfm?​deid=​146583).

As previously stated in 71 FR 59107, EPA is releasing the draft “Child-Specific Exposure Factors Handbook” solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. This document has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency policy or determination. EPA will consider any public comments submitted in accordance with this notice when revising the document.


The 30-day public comment period begins January 22, 2007, and ends February 21, 2007. Technical comments should be in writing and must be received by EPA by February 21, 2007.


The draft, “Child-Specific Exposure Factors Handbook,” is available primarily via the Internet on the National Center for Environmental Assessment's home page under the Recent Additions and the Data and Publications menus at​ncea. A limited number of paper copies are available from the Technical Information Staff, NCEA-W; telephone: 202-564-3261; facsimile: 202-565-0050. If you are requesting a paper copy, please provide your name, your mailing address, and the document title, “Child-Specific Exposure Factors Handbook” (EPA/600/R-06/096A).

Comments may be submitted electronically via, by mail, by facsimile, or by hand delivery/courier. Please follow the detailed instructions provided in the SUPPLEMENTARY INFORMATION section of this notice.

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For information on the public comment period, contact the Office of Environmental Information Docket; telephone: 202-566-1752; facsimile: 202-566-1753; or e-mail:

For technical information, contact Jacqueline Moya, NCEA; telephone: 202-564-3245; facsimile: 202-565-0079; or e-mail:

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How To Submit Technical Comments to the Docket at

Submit your comments, identified by Docket ID No. EPA-HQ-ORD-2006-0812 by one of the following methods:

  • Follow the on-line instructions for submitting comments.
  • E-mail:
  • Fax: 202-566-1753.
  • Mail: Office of Environmental Information (OEI) Docket (Mail Code: 2822T), U.S. Environmental Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460. The phone number is 202-566-1752.
  • Hand Delivery: The OEI Docket is located in the EPA Headquarters Docket Center, Room 3334, EPA West Building, 1301 Constitution Ave., NW., Washington, DC. The EPA Docket Center 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. Such deliveries are only accepted during the docket's normal hours of operation, and special arrangements should be made for deliveries of boxed information.

If you provide comments by mail or hand delivery, please submit one unbound original with pages numbered consecutively, and three copies of the comments. For attachments, provide an index, number pages consecutively with the comments, and submit an unbound original and three copies.

Instructions: Direct your comments to Docket ID No. EPA-HQ-ORD-2006-0812. Please ensure that your comments are submitted within the specified comment period. Comments received after the closing date will be marked “late,” and may only be considered if time permits. It is EPA's policy to include all comments it receives in the public docket without change and to make the comments available online at, including any personal information provided, unless a 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 or e-mail. The 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, 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 information about EPA's public docket visit the EPA Docket Center homepage at​epahome/​dockets.htm.

Docket: Documents in the docket are listed in the 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 materials, such as copyrighted material, are publicly available only in hard copy. Publicly available docket materials are available either electronically in or in hard copy at the OEI Docket in the EPA Headquarters Docket Center.

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Dated: January 12, 2007.

George Alapas,

Acting Director, National Center for Environmental Assessment.

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[FR Doc. E7-827 Filed 1-19-07; 8:45 am]