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 1997
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Geophysical Investigations at a Buried Disposal Site on Fort Richardson,
Alaska
6. AUTHORS
Allan J. Delaney, Jeffrey C. Strasser, Daniel E. Lawson,
Steven A. Arcone, and Edward B. Evenson
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
CRREL Report 97-4
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
U.S. Army Alaska
Directorate of Public Works
Fort Richardson, Alaska
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)
The Poleline Road Disposal Area, located on Fort Richardson, Alaska, was a U.S. Army dump in the early 1950s.
In 1990 it was identified as an area potentially contaminated with volatile organic compounds. CRREL con-
ducted extensive geophysical investigations that delineated anomalous responses in many areas of burial
within glacial outwash deposits. Ground penetrating radar and electromagnetic induction surveys were used
prior and subsequent to excavation. Geophysical data collected on a 5-m grid defined locations for several
anomalous areas containing both dispersed and large, discrete targets. Radar defined anomalous areas by the
concentration of strong diffractions. The induction survey differentiated metallic from nonmetallic contamina-
tions. The interpreted maximum depth of debris was 4 m. Uncontaminated areas were generally defined by
continuous, horizontal radar reflections, suggesting undisturbed or compacted soil horizons. The anomaly
maps produced from these surveys guided an excavation that removed hazardous material. The removed
material included munitions, mustard gas cylinders, medical waste, steel drums, and other trash. The radar and
electromagnetic surveys were repeated using a more closely spaced grid to verify that the excavated areas were
clean and to define more precisely anomalies in the areas not excavated. That survey shows many targets of
potential or present contamination that should be removed.
14. SUBJECT TERMS
15. NUMBER OF PAGES
22
Electromagnetic induction
Geophysical investigations
16. PRICE CODE
Fort Richardson, Alaska
Ground penetrating radar
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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