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Draft Toxicological Review of Hexachloroethane: In Support of the Summary Information in the Integrated Risk Information System (IRIS)

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Environmental Protection Agency (EPA).


Notice of Public Comment Period and Listening Session.


EPA is announcing a 60-day public comment period and a public listening session for the external review draft document titled “Toxicological Review of Hexachloroethane: In Support of Summary Information on the Integrated Risk Information System (IRIS)” (EPA/635/R-09/007). The draft document was prepared by the National Center for Environmental Assessment (NCEA) within the EPA's Office of Research and Development (ORD). The public comment period and the external peer-review workshop, which will be scheduled at a later date and announced in the Federal Register, are separate processes that provide opportunities for all interested parties to comment on the document. EPA intends to forward the public comments that are submitted in accordance with this notice to the external peer-review panel prior to the meeting for their consideration. When finalizing the draft document, EPA intends to consider any public comments that EPA receives in accordance with this notice.

EPA is also announcing a listening session to be held on June 16, 2010, during the public comment period for this draft document. This listening session is a step in EPA's revised IRIS process, announced on May 21, 2009, to develop human health assessments for inclusion in the IRIS database. The purpose of the listening session is to allow all interested parties to present scientific and technical comments on Start Printed Page 26957draft IRIS health assessments to EPA and other interested parties during the public comment period and before the external peer review meeting. EPA welcomes the scientific and technical comments that will be provided to the Agency by the listening session participants. The comments will be considered by the Agency as it revises the draft assessment in response to the independent external peer review and the public comments. All presentations submitted to EPA according to the instructions below will become part of the official public record.

EPA is releasing this draft document 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.


The public comment period begins May 13, 2010, and ends July 12, 2010. Technical comments should be in writing and must be received by EPA by July 12, 2010.

The listening session on the draft IRIS health assessment for hexachloroethane will be held on June 16, 2010, beginning at 9 a.m. and ending at 4 p.m., Eastern Daylight Time. If you want to make a presentation at the listening session, you should register by June 9, 2010, indicate that you wish to make oral comments at the session, and indicate the length of your presentation. When you register, please indicate if you will need audio-visual aid (e.g., lap top computer and slide projector). In general, each presentation should be no more than 30 minutes. If, however, there are more requests for presentations than the allotted time allows, then the time limit for each presentation will be adjusted. A copy of the agenda for the listening session will be available at the meeting. If no speakers have registered by June 9, 2010, the listening session will be cancelled and EPA will notify those registered of the cancellation.

Listening session participants who want EPA to share their comments with the external peer reviewers should also submit written comments during the public comment period using the detailed and established procedures described in the SUPPLEMENTARY INFORMATION section of this notice. Comments submitted to the docket prior to the end of the public comment period will be submitted to the external peer reviewers and considered by EPA in the disposition of public comments. All comments must be submitted to the docket, but comments received after the public comment period closes will not be submitted to the external peer reviewers.


The draft “Toxicological Review of Hexachloroethane: In Support of Summary Information on the Integrated Risk Information System (IRIS)” is available primarily via the Internet on the NCEA home page under the Recent Additions and Publications menus at​ncea. A limited number of paper copies are available from the Information Management Team, NCEA; telephone: 703-347-8561; facsimile: 703-347-8691. If you are requesting a paper copy, please provide your name, mailing address, and the document title.

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

The listening session on the draft hexachloroethane assessment will be held at the EPA offices at Two Potomac Yard (North Building), 7th Floor, Room 7100, 2733 South Crystal Drive, Arlington, Virginia 22202. To attend the listening session, register by June 9, 2010, by e-mailing (subject line: Hexachloroethane Listening Session); by calling 703-750-3000, ext. 545, or toll free at 1-800-2-VERSAR (ask for Kathy Coon, the Hexachloroethane Listening Session Coordinator); or by faxing a registration request to 703-642-6954. Please reference the “Hexachloroethane Listening Session” and include your name, title, affiliation, full address and contact information.

Please note that to gain entrance to this EPA building to attend the meeting, attendees must have photo identification with them and must register at the guard's desk in the lobby. The guard will retain your photo identification and will provide you with a visitor's badge. At the guard's desk, attendees should give the name Christine Ross and the telephone number, 703-347-8592, to the guard on duty. The guard will contact Ms. Ross who will meet you in the reception area to escort you to the meeting room. When you leave the building, please return your visitor's badge to the guard and you will receive your photo identification.

A teleconference line will also be available for registered attendees/speakers. The teleconference number is 866-299-3188 and the access code is 926-378-7897, followed by the pound sign (#). The teleconference line will be activated at 8:45 am, and you will be asked to identify yourself and your affiliation at the beginning of the call.

Information on Services for Individuals with Disabilities: EPA welcomes public attendance at the “Hexachloroethane Listening Session” and will make every effort to accommodate persons with disabilities. Questions regarding access or services for individuals with disabilities should be directed to Versar, Inc. by mailing Versar, Inc., 6850 Versar Center, Springfield, VA 22151; by e-mailing (subject line: Hexachloroethane Listening Session); by calling (703) 750-3000, ext. 545, or toll free at 1-800-2-VERSAR (1-800-283-7727) (ask for Kathy Coon, the Hexachloroethane Listening Session Coordinator); or by faxing a registration request to 703-642-6954. Please reference the Hexachloroethane Listening Session and include your name, title, affiliation, full address and contact information.

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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 information on the public listening sessions, please contact Christine Ross, IRIS Staff, National Center for Environmental Assessment, (8601P), U.S. EPA, 1200 Pennsylvania Avenue, NW., Washington, DC 20460; telephone: 703-347-8592; facsimile: 703-347-8689; or e-mail:

If you have questions about the document, please contact John Cowden, IRIS Staff, National Center for Environmental Assessment, 109 T.W. Alexander Dr., Research Triangle Park, NC 27709; telephone: 919-541-3667; facsimile: 919-541-2985; or e-mail:

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I. Information About IRIS

EPA's IRIS is a human health assessment program that evaluates quantitative and qualitative risk information on effects that may result from exposure to specific chemical substances found in the environment. Through the IRIS Program, EPA provides the highest quality science-based human health assessments to support the Agency's regulatory activities. The IRIS database contains information for more than 540 chemical substances that can be used to support the first two steps (hazard identification and dose-response evaluation) of the Start Printed Page 26958risk assessment process. When supported by available data, IRIS provides oral reference doses (RfDs) and inhalation reference concentrations (RfCs) for chronic noncancer health effects and cancer assessments. Combined with specific exposure information, government and private entities use IRIS to help characterize public health risks of chemical substances in a site-specific situation and thereby support risk management decisions designed to protect public health.

II. How To Submit Technical Comments to the Docket at

Submit your comments, identified by Docket ID No. EPA-HQ-ORD-2010-0403 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, EPA West Building, Room 3334, 1301 Constitution Ave., NW., Washington, DC. The EPA Docket Center's 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-2010-0403. 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: All 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 material, such as copyrighted material, will be 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: April 20, 2010.

Rebecca Clark,

Acting Director, National Center for Environmental Assessment.

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[FR Doc. 2010-11292 Filed 5-12-10; 8:45 am]