[Federal Register: September 13, 2004 (Volume 69, Number 176)]
[Notices]               
[Page 55160]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr13se04-40]                         

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ENVIRONMENTAL PROTECTION AGENCY

[FRL-7812-1]

 
Example Exposure Scenarios

AGENCY: Environmental Protection Agency.

ACTION: Notice of availability of a final document.

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SUMMARY: This notice announces the availability of a final report 
titled, Example Exposure Scenarios (EPA/600/R-03/036, April 2004), 
which was prepared by the U.S. Environmental Protection Agency's (EPA) 
National Center for Environmental Assessment (NCEA) of the Office of 
Research and Development (ORD).

ADDRESSES: The document will be made available electronically through 
the NCEA Web site (http://www.epa.gov/ncea). A limited number of paper 

copies will be available from the EPA's National Service Center for 
Environmental Publications (NSCEP), P.O. Box 42419, Cincinnati, OH 
45242; telephone: 1-800-490-9198 or 513-489-8190; facsimile: 513-489-
8695. Please provide your name, your mailing address, the title and the 
EPA number of the requested publication.

FOR FURTHER INFORMATION CONTACT: The Technical Information Staff, 
National Center for Environmental Assessment/Washington Office (8623D), 
U.S. Environmental Protection Agency, 1200 Pennsylvania Avenue, NW., 
Washington, DC 20460. Telephone: 202-564-3261; fax: 202-565-0050; e-
mail: nceadc.comment@epa.gov.

SUPPLEMENTARY INFORMATION: Exposure scenarios are a tool to help the 
assessor develop estimates of exposure, dose, and risk. An exposure 
scenario generally includes facts, data, assumptions, inferences, and 
sometimes professional judgment about how the exposure takes place. The 
human physiological and behavioral data necessary to construct exposure 
scenarios can be obtained from the Exposure Factors Handbook ( EPA/600/
P-95/002Fa-Fc, 1997). The Exposure Factors Handbook provides data on 
drinking water consumption, soil ingestion, inhalation rates, dermal 
factors including skin area and soil adherence factors, consumption of 
fruits and vegetables, fish, meats, dairy products, homegrown foods, 
breast milk, activity patterns, body weight, consumer products, and 
life expectancy.
    The purpose of the Example Exposure Scenarios is to outline 
scenarios for various exposure pathways and to demonstrate how data 
from the Exposure Factors Handbook may be applied for estimating 
exposures. The example scenarios have been selected to best demonstrate 
the use of the various key data sets in the Exposure Factors Handbook 
and represent commonly encountered exposure pathways. An exhaustive 
review of every possible exposure scenario for every possible receptor 
population would not be feasible and is not provided. Instead, readers 
may use the representative examples provided here to formulate 
scenarios that are appropriate to the assessment of interest, and apply 
the same or similar data sets and approaches as shown in the examples.

    Dated: August 11, 2004.
P.W. Preuss,
Director, National Center for Environmental Assessment.
[FR Doc. 04-20598 Filed 9-10-04; 8:45 am]

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