Process and apparatus for obtaining samples of liquid and gas from soil

Patent · Tue Mar 30 00:00:00 EST 1999

OSTI ID:335462

Rossabi, J; May, C P; Pemberton, B E; Shinn, J; Sprague, K

An apparatus and process for obtaining samples of liquid and gas from subsurface soil is provided having filter zone adjacent an external expander ring. The expander ring creates a void within the soil substrate which encourages the accumulation of soil-borne fluids. The fluids migrate along a pressure gradient through a plurality of filters before entering a first chamber. A one-way valve regulates the flow of fluid into a second chamber in further communication with a collection tube through which samples are collected at the surface. A second one-way valve having a reverse flow provides additional communication between the chambers for the pressurized cleaning and back-flushing of the apparatus. 8 figs.

• Research Organization: De Gruyter Open
• Sponsoring Organization: USDOE, Washington, DC (United States)
• Assignee: SRS; SCA: 540220; PA: EDB-99:047190; SN: 99002077308
• Patent Number(s): US 5,889,217/A/
• Application Number: PAN: 8-650,473
• OSTI ID: 335462
• Resource Relation: Other Information: PBD: 30 Mar 1999
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
SOILS
SAMPLING
SAMPLERS
DESIGN
LIQUIDS
GASES
LAND POLLUTION