Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
September 1996
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Establishing a Relationship Between Passive Soil Vapor and Grab
Sample Techniques for Determining Volatile Organic Compounds
6. AUTHORS
Alan D. Hewitt
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
Special Report 96-14
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
U.S. Army Engineer Waterways Experiment Station
Vicksburg, Mississippi
11. SUPPLEMENTARY NOTES
For conversion of SI units to non-SI units of measurement consult ASTM Standard E380-93, Standard Practice for Use of the
International System of Units, published by the American Society for Testing and Materials, 1916 Race St., Philadelphia, Pa.
19103.
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161
13. ABSTRACT (Maximum 200 words)
A passive soil vapor and an in-vial sample handling and analysis method were compared for estimating
volatile organic compound (VOC) contamination in the near-surface vadose zone. These two methods of
VOC site characterization, although very different operationally, established very similar trends for trichloro-
ethylene (TCE) contamination. The correlation (r2 = 0.944) of the results from these two methods shows a
much better agreement than what has been reported between comparisons of in-vial methods (or solvent
immersion) and conventional soil sample collection and handling methods often used for site characteriza-
tion activities. The strong correlation between these two methods and from grab samples taken 15 cm apart
indicates that this analyte is homogeneously distributed as compared to metals and semivolatile organic
compounds. For contaminants such as TCE, soil vapor measurement technologies offer a promising means of
estimating subsurface concentrations in locations were grab samples cannot be easily obtained.
14. SUBJECT TERMS
15. NUMBER OF PAGES
16
Contamination
In-vial methods
Trichloroethylene
16. PRICE CODE
Grab samples
Soil vapor techniques
Volatile organic compounds
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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