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The Use of a Standpipe to Evaluate Ground Water Samplers
Author(s) -
Tai Doreen Y.,
Turner Kenneth S.,
Garcia Lisa A.
Publication year - 1991
Publication title -
groundwater monitoring and remediation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 47
eISSN - 1745-6592
pISSN - 1069-3629
DOI - 10.1111/j.1745-6592.1991.tb00359.x
Subject(s) - environmental science , trap (plumbing) , sampling (signal processing) , hydrology (agriculture) , environmental engineering , engineering , geotechnical engineering , electrical engineering , filter (signal processing)
A standpipe system was developed for testing the reliability of ground water samplers. The unit consists of a stainless steel pipe 5 inches (13 centimeters) in diameter and 100 feet (30.5 meters) in height. It has 14 sampling ports from which control samples can be withdrawn at the same time and position as the samples are collected by a sampler lowered to that position. Test solutions were made in two mixing tanks, totaling 260 gallons (980 liters), by diluting the concentrate of five volatile chlorohydrocarbons in water at two levels of concentration: 10‐to‐30 and 100‐to‐200 parts per billion (micrograms per liter). A gas chromatograph interfaced with a purge‐and‐trap system was used to perform the analyses. Comparisons of the control samples with the sampler‐collected samples have indicated that the three non‐pumping samplers had recoveries in the range of 92.4 to 103.5 percent and the three pumping samplers had recoveries ranging from 97.7 to 101.5 percent.