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
February 1997
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Dispersion by Chemical Reaction Testing of Rocky Mountain Arsenal
Basin F Waste Soils
CPAR Project AC910260
6. AUTHORS
James R. Payne and Giles M. Marion
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 97-3
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
Office of the Chief of Engineers
Washington, D.C. 20314-1000
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)
Many military installations have soil contamination problems that range from heavy metals to petroleum products.
Rocky Mountain Arsenal (RMA) Basin F contains high concentrations of salts, heavy metals, ammonia, urea, and
organics. The Dispersion by Chemical Reaction (DCR) process leads to a reduction in the mobility of the organic and
inorganic constituents by first removing volatile constituents via steam stripping and volatilization, then trapping the
nonvolatile contaminants in a nonmobile phase (microencapsulation), and finally compacting the treated material into
large soil bodies (macroencapsulation). This report summarizes the results of the DCR testing of soil-amended Basin F
sludge from RMA. The primary focus of this study is on pesticide leachability. The DCR process used to treat the Basin
F waste soil produced a dry, homogeneous, soil-like material with desirable physical properties that on compaction
achieved the following remediation goals: reduction of all leachable volatiles to nondetectable levels, confinement of
all metals to below RCRA TCLP levels, and a decrease in pesticide leachability to levels approaching RCRA standards.
For example, endrin TCLP concentration was reduced from 74 g/L to 2028 g/L (regulatory limit = 20 g/L). In
several cases, reductions in pesticide leachability could be attributed to simple dilution with the calcium oxide (CaO)
reagent. However in other cases, microencapsulation and/or macroencapsulation also played a role in reducing
pesticide leachability. Additional work is necessary to optimize the amounts of lime-milk, hydrophobic CaO, and
benign oil used in the processing of RMA Basin F waste soils. Ideally, the optimum design should achieve the regulatory
and client goals, while minimizing materials handling, energy, and reagent inputs.
14. SUBJECT TERMS
15. NUMBER OF PAGES
25
DCR process
Pesticides
Stabilization
16. PRICE CODE
Immobilization
Remediation
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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