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
April 1996
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Sorption and Leaching of Trace-Level Metals by Polymeric Well Casings
6. AUTHORS
Thomas A. Ranney and Louise V. Parker
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 96-8
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
U.S. Army Environmental Center
Aberdeen Proving Ground, Maryland 21010-5401
SFIM-AEC-ET-CR-95085
11. SUPPLEMENTARY NOTES
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 most commonly used well casing materials (polyvinyl chloride [PVC], polytetrafluoroethylene [PTFE] and
stainless steel) cannot be used for all monitoring applications. Therefore, a series of experiments was conducted
to compare three alternative polymeric well casing materials (fluorinated ethylene propylene [FEP], fiberglass-
reinforced epoxy [FRE] and fiberglass-reinforced plastic [FRP]) with PVC and PTFE. These studies were
conducted to determine the overall suitability of these materials for use in groundwater monitoring wells.
Previous studies compared these materials for sorption of dilute organic solutes, leaching of organic constituents,
and resistance to degradation by chemicals, especially organic solvents. This particular study focuses on sorption
and leaching of metals. This study shows that the fiberglass materials were more apt to leach metal contaminants
than PVC, FEP, and PTFE. Leached concentrations, with one exception (Pb leaching from FRP), were below
maximum allowable limits set by the US EPA for drinking water. With respect to sorption, none of the polymers
sorbed the anions tested, but all of them sorbed the cations tested. FEP and PTFE were much less sorptive than
the other materials. These results and those from our previous studies can be used, along with other consider-
ations, to select a casing material that is best suited for the intended monitoring application and conditions in the
well.
Anions, Cations, FEP, FRE, FRP, Fiberglass-reinforced epoxy, Fiber-
14. SUBJECT TERMS
15. NUMBER OF PAGES
24
glass-reinforced plastic, Fluorinated ethylene propylene, Inorganic contaminants,
Inorganic constituents, Leaching, Metals, PTFE, PVC, Polytetrafluoroethylene,
16. PRICE CODE
Polyvinyl chloride, Sorption, Well casings
2119. SECURITY CLASSIFICATION
17. SECURITY CLASSIFICATION
18. 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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