Downhole passive water sampler and method of sampling

Details Downhole passive water sampler and method of sampling Downhole passive water sampler and method of sampling

1996-08-20

1998-09-08

Noland, Thomas P.

Measuring and testing

Sampler, sample handling, etc.

With constituent separation

73 6456, 7386451, 166264, E21B 4908

Patent

active

058047433

ABSTRACT:
An improved method and apparatus for monitoring the concentration of contaminants, including volatile organic compounds, in groundwater is provided comprising a semipermeable membrane defining an inner chamber therein. The membrane is permeable to contaminants but impermeable to a reference fluid, which is preferably distilled water. The method of sampling comprises placing the semipermeable membrane, which contains the reference fluid, in contact with contaminated groundwater, thereby allowing contaminants to diffuse through the semipermeable membrane and into the inner chamber. Sufficient time is allowed for the contaminant concentrations in the groundwater and in the reference fluid to reach equilibrium. The semipermeable membrane is then removed from contact with the groundwater, and a sample withdrawn from the inner chamber for analysis, preferably through a port communicating with the inner chamber.

REFERENCES:
patent: 3367850 (1968-02-01), Johnson
patent: 3715913 (1973-02-01), Anderson
patent: 3929003 (1975-12-01), Llewellyn
patent: 4078433 (1978-03-01), Mc Lobe, Jr. et al.
patent: 4516580 (1985-05-01), Polonyi
patent: 4692287 (1987-09-01), Timmon
patent: 4763658 (1988-08-01), Jones
patent: 5110473 (1992-05-01), Hassett
patent: 5147561 (1992-09-01), Burge et al.
patent: 5442968 (1995-08-01), Westlake, III et al.
patent: 5454275 (1995-10-01), Kasis
patent: 5589647 (1996-12-01), Jax et al.
Alena Murdroch, M.Sc. and Scott D. MacKnight, Ph.D., editors, CRD Handbook of Techniques for Aquatic Sediments Sampling, CRC Press, 1991. pp. 179-184, 198.
Don A Vroblesky and Michelle M. Lorah, "Prospecting for Zones of Contaminated Ground-Water Discharge to Streams Using Bottom-Sediment Gas Bubbles", Ground Water, vol. 29, No. 3, May-Jun. 1991., pp. 333-340.
Don A. Vroblesky, Michelle M. Lorah, Stephen P. Trimble, "Mapping Zones of Contaminated Ground-Water Discharge Using Creek-Bottom-Sediment Vapo Samplers, Aberdeen Proving Ground, Maryland", Ground Water, vol. 29, No. 1, Jan.-Feb., 1991. pp. 7-12.
D. A. Vroblesky, J.F. Robertson, Temporal Changes in VOC Discharge to Surface Water From a Fractured Rock Aquifer During Well Installation and Operation, Greenville, South Carolina, Ground Water Monitoring & REmediation, vol. XVI, No. 3, Summer 1996. pp. 196-201.
Don A. Vroblesky, J. Frederick Robertson, Mario Fernandez, C. Majorie Aelion, "The Permeable-Membrane Method of Passive Soil-Gas Collection", Proceedings of the Sixth National Outdoor Action Conference, May 11-13, 1992 Riviera Hotel, Las Vegas, Nevada. pp. 3-16.

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