| Abstract: | Observation wells installed for artificial-recharge research and other wells used in different ground-water programs are frequently cased with small-diameter steel pipe. To obtain samples from these small-diameter wells in order to monitor water quality, and to calibrate solute-transport models, a small-diameter pump with unique operating characteristics is required that causes a minimum alternation of samples during field sampling. A small-diameter gas-driven pump was designed and built to obtain water samples from wells of two-inch diameter or larger. The pump is a double-piston type with the following characteristics: (1) The water sample is isolated from the operating gas, (2) no source of electricity is ncessary, (3) operation is continuous, (4) use of compressed gas is efficient, and (5) operation is reliable over extended periods of time. Principles of operation, actual operation techniques, gas-use analyses and operating experience are described. Complete working drawings and a component list are included. Recent modifications and pump construction for high-pressure applications also are described. (Woodard-USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 29726 |
| Citation Author: | Signor, Donald C. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | iv, 25 p. :ill. (some fold. in pocket) ;27 cm. |
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| Citation Publisher: | U.S. Geological Survey, Water Resources Division, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 78-72 |
| Citation Search Results Text: | Gas-driven pump for ground-water samples; 1978; WRI; 78-72; Signor, Donald C. |
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| Citation Year: | 1978 |
| Type: | citation/reference |
| Text: | Gas-driven pump for ground-water samples; 1978; WRI; 78-72; Signor, Donald C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, Water Resources Division, |
