Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS.
1. REPORT DATE (DD-MM-YY)
3. DATES COVERED (From - To)
2. REPORT TYPE
December 1999
4. TITLE AND SUBTITLE
5a. CONTRACT NUMBER
5b. GRANT NUMBER
Monitoring the Natural Attenuation of Explosives
5c. PROGRAM ELEMENT NUMBER
6. AUTHOR(S)
5d. PROJECT NUMBER
5e. TASK NUMBER
Paul H. Miyares, C. Michael Reynolds, Judith C. Pennington,
Richard B. Coffin, Thomas F. Jenkins, and Luis Cifuentes
5f. WORK UNIT NUMBER
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION REPORT
NUMBER
U.S. Army Engineer Research and Development Center
Special Report 99-18
Cold Regions Research and
Environmental Laboratory
Engineering Laboratory
Vicksburg, MS 39180
72 Lyme Road
Hanover, New Hampshire 03755
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSOR / MONITOR'S ACRONYM(S)
Strategic Environmental Research
and Development Program
11. SPONSOR / MONITOR'S REPORT
NUMBER(S)
12. DISTRIBUTION / AVAILABILITY STATEMENT
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161.
13. SUPPLEMENTARY NOTES
14. ABSTRACT
The use of carbon and nitrogen stable isotope measurements from TNT was examined as a possible tool for monitoring the
natural attenuation of TNT. Incubation studies of spiked soil samples were conducted. The concentration of TNT and the δel (δ)
values for 13C and 15N of the soil and of TNT were measured with time. Results indicated that no measureable changes in the
δ13C or δ15N value of the soil or δ13C values for TNT could be detected as the concentration of TNT decreased. Measureable
changes in the δ15N value of TNT with changing TNT concentration suggested a possible monitoring route. Field studies using
both soil and groundwater samples support the laboratory finding that changes in the δ15N for TNT extracted from groundwater
could be detected in samples collected at different points along transects at the Louisiana Army Ammunition Plant and that no
measurable change in the δ13C values for soil or TNT could be seen.
15. SUBJECT TERMS
Carbon-13
Natural attenuation
Stable isotopes
Nitrogen-15
16. SECURITY CLASSIFICATION OF:
17. LIMITATION OF
18. NUMBER
19a. NAME OF RESPONSIBLE PERSON
OF ABSTRACT
OF PAGES
27
19b. TELEPHONE NUMBER (include area code)
a. REPORT
b. ABSTRACT
c. THIS PAGE
Unclassified
Unclassified
Unclassified
Standard Form 298 (Rev. 8-98)
Prescribed by ANSI Std. 239.18
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