The Effects of Ground Water Sampling Devices on Water Quality: A Literature Review |
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| Authors: | Louise V. Parker |
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| Affiliation: | Louise Parker is a research physical scientist at the U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) (72 Lyme Rd, Hanover, NH 03755–1290). She received her B.A. in microbiology from the University of New Hampshire and her M. S. in food microbiology from the Department of Food Science and Nutrition at the University of Massachusetts. Her present research interests are in ground water sampling and material interactions. She is a member of AGWSE and has been active in ASTM subcommitte D18.21 on Ground Water and Vadose Zone Investigations. |
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| Abstract: | ![]()
This paper reviews both field and laboratory studies that tested or compared the ability of various types of sampling devices to deliver representative ground water samples. Several types of grab samplers, positive displacement devices, and suction-lift devices were evaluated, Gas-lift and inertial-lift pumps were also evaluated. This study found that most of these devices can. under certain circumstances, alter the chemistry of ground water samples, das-lift pumps, older types of submersible centrifugal pumps, and suction-lift devices are not recommended when sampling for sensitive constituents such as volatile organics and inorganics, or inorganics that are subject to oxidation/precipitation reactions. In general, of the devices reviewed in this paper, bladder pumps gave the best recovery of sensitive constituents. However, better performance could be achieved for several devices if improved operational guidelines were developed by additional testing, especially at lower flow rates. Clearly, further research is warranted. Future studies should focus on pumping rate, flow control mechanisms, and dedication or decontamination of sampling devices. |
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