[Federal Register Volume 66, Number 21 (Wednesday, January 31, 2001)]
[Notices]
[Pages 8401-8402]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 01-2672]
-----------------------------------------------------------------------
ENVIRONMENTAL PROTECTION AGENCY
[FRL-6939-8]
Options for Development of Parametric Probability Distributions
for Exposure Factors
AGENCY: Environmental Protection Agency (EPA).
ACTION: Notice of availability of a final report.
-----------------------------------------------------------------------
SUMMARY: The notice announces the availability of a final report,
Options for Development of Parametric Probability Distributions for
Exposure Factors (EPA/600/R-00/058, July 2000). This report was
prepared by the National Center for Environmental Assessment, within
the Office of Research and Development (EPA) at the request of the
Office of Emergency and Remedial Response within the Office of Solid
Waste and Emergency Response, to assist them when applying
probabilistic techniques in exposure assessments. The purpose of the
document is to provide procedures to fit distributions to selected data
from the Exposure Factors Handbook (EPA/600/P-95/002Fa-c). The
procedure includes the selection of models, estimation, assessment of
fit, and uncertainty. Three exposure factors were used as test cases.
These included tap water intake, inhalation rates, and population
mobility. The procedures used in these three exposure factors are
fairly general and applicable to other factors.
ADDRESSES: The document will be made available electronically through
the National Center for Environmental Assessment's web site
(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
and mailing address and the title and EPA number of the requested
publication.
FOR FURTHER INFORMATION CONTACT: Jacqueline Moya, National Center for
Environmental Assessment-Washington Office (8623D), U.S. Environmental
Protection Agency, Washington DC 20460; telephone: 202-564-3245;
facsimile: 202-565-0076; email:[email protected].
SUPPLEMENTARY INFORMATION: Since the publication of the Exposure
Factors Handbook (EPA/600/P-95/002Fa-c) in 1997, users of the Handbook
have commented on the need to fit distributions to the data in the
Handbook to assist them when applying methods to express assessments.
This report is issued as a companion document to the Exposure Factors
Handbook.
The methodology presented in the document was tested with three
exposure factors: tap water, inhalation rates, and population mobility.
However, the document provides a discussion on the applicability of
this methodology to other exposure factors in the Exposure Factors
Handbook.
The report discusses the pertinent statistical concepts and theory
used and how they apply to the methodology developed for the fitting of
distributions. The methodology models, estimation, assessment of fit,
and uncertainty.
[[Page 8402]]
Dated: December 22, 2000.
Bruce Rodan,
Director, National Center for Environmental Assessment.
[FR Doc. 01-2672 Filed 1-30-01; 8:45 am]
BILLING CODE 6560-50-P