July 5, 2000

EPA-SAB-RAC-CON-00-008

Honorable Carol M. Browner
Administrator
U.S. Environmental Protection Agency
1200 Pennsylvania Avenue, NW
Washington, DC 20460

              Subject:       Notification of a Consultation on ISCORS Sewage
                            Sludge Dose Modeling Scenarios

Dear Ms. Browner:

       The Radiation Advisory Committee (RAC) of the Science Advisory Board (SAB), met on
April 25- 27, 2000, in part to conduct a consultation with staff from the Office of Radiation and Indoor
Air (ORIA) on the Interagency Steering Committee on Radiation Standards' (ISCORS) thoughts and
proposed scenarios for estimating dose and risk from exposure to radioactive material in sewage
sludge.

       The SAB has developed the consultation as a mechanism to advise the Agency on technical
issues that should be considered in the development of regulations, guidelines, or technical guidance
before the Agency has taken a position. A consultation is conducted under the normal requirements of
the Federal Advisory Committee Act, which include advance notice of the public meeting in the Federal
Register.

       As is our customary practice, there will be no formal report from the SAB as a result of this
consultation, nor do we expect any formal response from the Agency.  However, the Committee looks
forward to the opportunity of conducting a formal review of the ISCORS Sewage Sludge Dose Model
in the future.

                                  Sincerely,

       /s/                                              /s/

Dr. Morton Lippmann, Interim Chair          Dr. Janet A. Johnson, Chair
Science Advisory Board                           Radiation Advisory Committee
                                                Science Advisory Board

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                          U.S. Environmental Protection Agency
                                 Science Advisory Board
                          Radiation Advisory Committee (RAC)
CHAIR
Dr. Janet Johnson, Senior Radiation Scientist, Shepherd Miller, Inc., Ft. Collins, CO

MEMBERS
Dr. Lynn R. Anspaugh, Research Professor, University of Utah, Dept. of Radiology, Salt Lake City,
       UT

Dr. Vicki M. Bier, University of Wisconsin, Dept. Of Industrial Engineering, Madison, WI

Dr. Bruce Boecker, Ph..D. Scientist Emeritus, Lovelace Respiratory Research Institute,
       Albuquerque, NM

Dr. Stephen L. Brown, R2C2 Risks of Radiation & Chemical Compounds, Oakland, CA

Dr. Gilles Bussod,  Ph.D. Earth & Environmental Sciences Division, Los Alamos National
       Laboratory, Los Alamos, NM

Dr. Thomas F. Gesell, Professor of Health Physics, Idaho State University, Dept. of Health Physics,
       Pocatello, ID

Dr. Jill Lipoti, Assistant Director for Radiation Protection Programs, New Jersey Dept. Of
       Environmental Protection, Div. of Environmental Safety, Health and Analytical Programs,
       Trenton, NJ

Dr. Ellen Mangione, M.D., M.P.H., Director, Disease Control and Environmental  Epidemiology
       Division, Colorado Department of Public Health and Environment, Denver, CO

Dr. John W. Poston, Sr., Professor and Head, Texas A&M University, Dept. Of Nuclear
       Engineering, College Station, TX

Dr. Genevieve S. Roessler, Radiation Consultant, Elysian, MN

CONSULTANTS
Dr. Richard W. Hornung, University of Cincinnati, Cincinnati, OH

Dr. Wu-Seng Lung, University of Virginia, Charlottesville, VA

Dr. Jana Milford, Associate Professor, University of Colorado, Boulder, CO

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Dr. Bobby R. Scott, Staff Scientist, Lovelace Respiratory Research Institute, Albuquerque, NM1

Dr. James E. Watson, Jr., Professor, University of North Carolina, Chapel Hill, NC

SCIENCE ADVISORY BOARD STAFF
Mrs. Melanie Medina-Metzger, Designated Federal Officer, US EPA Science Advisory
       Board, 1200 Pennsylvania Avenue, NW,  Washington, D.C. 20460

Ms. Diana L. Pozun, Management Assistant, US EPA  Science Advisory Board, 1200 Pennsylvania
       Avenue, NW, Washington, D.C. 20460
       1  Unable to attend the meeting.

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                                         NOTICE
       This report has been written as a part of the activities of the Science Advisory Board, a public
advisory group providing extramural scientific information and advice to the Administrator and other
officials of the Environmental Protection Agency.  The Board is structured to provide balanced expert
assessment of scientific matters related to problems faced by the Agency.  This report has not been
reviewed for approval by the Agency; and hence, the contents of this report do not necessarily
represent the views and policies of the Environmental Protection Agency or other agencies in the
Federal government.  Mention of trade names or commercial products does not constitute a
recommendation for use.
Distribution and Availability: This Science Advisory Board report is provided to the EPA
Administrator, senior Agency management, appropriate program staff, interested members of the
public, and is posted on the SAB website (www.epa.gov/sab). Information on its availability is also
provided in the SAB's monthly newsletter (Happenings at the Science Advisory Board). Additional
copies and further information are available from the SAB Staff.
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