Record Display for the EPA National Library Catalog


Main Title Identifying sources of subsurface nitrate pollution with stable nitrogen isotopes /
Author Wolterink, Timothy J., ; Williamson, Hugh J. ; Jones, David C. ; Grimshaw, Thomas W. ; Holland, W. F.
Other Authors
Author Title of a Work
Williamson, Hugh J.,
Jones, David C.,
Grimshaw, Thomas W.,
Holland, W. F.,
Wolterink, Timothy J.
CORP Author Radian Corp., Austin, TX.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1979
Report Number EPA-600/4-79-050; RAD-78-200-155-15; EPA-68-03-2450
Stock Number PB80-102064
OCLC Number 06023773
Subjects Nitrates ; Groundwater--Pollution--United States ; Water, Underground--Pollution--United States
Additional Subjects Ground water ; Inorganic nitrates ; Isotopic labeling ; Soil analysis ; Water analysis ; Sources ; Water pollution ; Chemical analysis ; Sampling ; Sites ; Laboratory equipment ; Water pollution detection ; Water pollution sampling
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-4-79-050 Headquarters Library/Washington,DC 09/15/2014
EKBD  EPA-600/4-79-050 Research Triangle Park Library/RTP, NC 08/29/2003
ELBD ARCHIVE EPA 600-4-79-050 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023 DISPERSAL
EMBD  EPA/600/4-79/050 NRMRL/GWERD Library/Ada,OK 09/29/1995
ERAD  EPA 600/4-79-050 Region 9 Library/San Francisco,CA 10/29/2012
ESAD  EPA 600-4-79-050 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB80-102064 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xi, 151 pages : illustrations, figures, tables ; 28 cm.
This report describes the methods, results, conclusions, and recommendations of an investigation of a technique to identify sources of nitrate in ground water. A discussion of the theoretical basis of the technique is also provided. Over 300 soil and ground water samples were collected for this study. The samples are from numerous sites around the United States, representing a variety of environmental conditions. The nitrate in 66 of these samples was separated from other nitrogen species, converted to N2 gas, purified, and analyzed to determine the ratio (15)N/(14)N. These data were combined with the results of analyses performed previously by Jones (1) and Kreitler (2). Standard statistical techniques were used to analyze the observed variations in delta (15)N values, with respect to several nitrate sources and various environmental factors. It was found that nitrates from feedlots, barnyards and septic tanks can be distinguished from natural soil nitrates on the basis of their delta (15)N values. They cannot, however, be distinguished from each other. Environmental factors contributed to the observed variation in delta (15)N values.
"August 1979." U.S. Environmental Protection Contract No. Contract Number: 68-03-2450." Includes bibliographical references (pages 77-78)