rigid fluoropolymer tubing that is typically used
tion of DDT on solid particles. Soil Science Society
to a small enough size for drying.
of America Proceedings, 35: 887891.
Results from one of our recent studies (Parker
Devlin, J.F. (1987) Recommendations concerning
and Ranney 1997a) indicate that more flexible
materials and pumping systems used in the sam-
fluoropolymer tubing might be a suitable replace-
pling of groundwater contaminated with volatile
ment for the rigid fluoropolymers with respect to
organics. Water Pollution Research Journal of Canada,
sorption and desorption of organic solutes. This
22(1): 6572.
tubing could be coiled up to a much smaller size,
Federal Register (1984) Definition and procedure
thereby reducing the size of drying oven required.
for the determination of the method detection
However, we suspect that these tubings are not
limit. Code of Federal Regulations, Part 136, Ap-
strong enough for this purpose.
pendix B, October 26.
Another possibility is to develop protocols
Fink, M.J., and R.T. Boyajian (1989) Decontami-
where the pump (or entire system) is decontami-
nation procedure for ground water sampling
nated but the tubing is dedicated to one well. This
equipment. In Proceedings of the Third National Out-
solution would be less costly than dedicating the
door Action Conference on Aquifer Restoration, Ground
whole system, but still costly because of the ex-
Water Monitoring and Geophysical Methods, National
pense of the fluoropolymer tubing typically used.
Water Well Association, Dublin, Ohio, p. 305
However, some in the groundwater sampling com-
311.
munity argue that the pumps and tubing of even
Gillham, R.W., and S.F. O'Hannesin (1990) Sorp-
dedicated devices should be decontaminated prior
tion of aromatic hydrocarbons by materials used
to each sampling event so that decreases in or-
in construction of ground water sampling wells.
ganic contaminant concentrations can be more
In Ground Water and Vadose Zone Monitoring, ASTM
readily determined.
STP 1053, American Society for Testing and Mate-
Given that dedicating sampling pumps and
rials, Philadelphia, p. 108122.
tubing are expensive and that heating is essential
to remove organic contaminants (especially VOCs)
sory on 2,4,6-trinitrotoluene. U.S. Environmental
from any device with polymeric materials, and
Protection Agency, Office of Drinking Water,
the logistical problems associated with hot air
Washington, D.C.
drying a pump, perhaps our whole approach to
Holsen, T.M. (1988) The effect of soils on the
groundwater sampling needs to reexamined. Per-
permeation of plastic pipes by organic chemicals.
haps we need to seriously consider some of the
Ph.D. Thesis, University of California-Berkeley.
quicker, easier, less costly, small grab devices
University Microfilms International Dissertation
and passive systems that are currently being
Service order number 8902122.
developed.
Jenkins, D., R.E. Selleck, L. Bontoux, and D.
Soong (1986) Permeation of plastic pipes: Litera-
ture review and research needs. Sanitary Engi-
neering and Environmental Health Research Labo-
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13
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