[Federal Register Volume 68, Number 166 (Wednesday, August 27, 2003)]
[Notices]
[Pages 51576-51577]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 03-21934]


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ENVIRONMENTAL PROTECTION AGENCY

[FRL-7549-8]


Tracer-Test Planning Using the Efficient Hydrologic Tracer-Test 
Design (EHTD) Program

AGENCY: Environmental Protection Agency.

ACTION: Notice of availability of final document.

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SUMMARY: The U. S. Environmental Protection Agency (EPA) announces the 
availability of a final document and associated computer program, 
Tracer-Test Planning Using the Efficient Hydrologic Tracer-Test Design 
(EHTD) Program (EPA/600/R-03/034, April 2003). This document 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).

[[Page 51577]]

    The purpose of this document is to serve as a technical guide to 
various groups who must address potential or existing contamination 
problems in hydrologic systems using trace tests. Hydrologic 
complexities and inadequate data tends to relegate initial tracer-test 
designs regarding appropriate tracer masses and sample collection times 
to simple conjecture. This document and associated computer program 
alleviate some of these problems.
    EHTD produces a detailed assessment of expected tracer-test results 
before a tracer test is ever initiated. It also produces a probable 
tracer-breakthrough curve for each sampling station. Preliminary 
testing of EHTD has shown it to be reliable in most instances.

DATES: This document will be available soon.

ADDRESSES: This document is available electronically through the NCEA 
Web site at (www.epa.gov/ncea). A limited number of paper copies will 
be available from the EPA's National Service Center for Environmental 
Publications (NSCEP) in Cincinnati, OH (telephone: 1-800-490-9198 or 
513-489-8190; facsimile: 513-489-8695; or via the Internet at http://www.epa.gov/NCEPIhome/orderpub.html). Please provide your name, mailing 
address, the title, and EPA number of the requested publication when 
ordering from NSCEP. Copies may also be purchased from the National 
Technical Information Service (NTIS) in Springfield, Virginia; 
telephone: 1-800-553-NTIS[6847] or 703-605-6000; facsimile: 703-321-
8547. Please provide the number PB2003-103271 when ordering from NTIS.

FOR FURTHER INFORMATION CONTACT: For further information, please 
contact Malcolm Field (202-564-3279) mailing address: National Center 
for Environmental Assessment (8623D), U.S. Environmental Protection 
Agency, 1200 Pennsylvania Avenue, NW., Washington, DC 20460; facsimile: 
202-565-0079; e-mail: [email protected].

    Dated: August 18, 2003.
Peter W. Preuss,
Director, National Center for Environmental Assessment.
[FR Doc. 03-21934 Filed 8-26-03; 8:45 am]
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