Ground water and soil remediation: In situ air stripping using horizontal wells

Conference · Sun Dec 31 23:00:00 EST 1989

OSTI ID:5624653

Kaback, D S; Looney, B B; Eddy, C A; Hazen, T C

An innovative environmental restoration technology, in situ air stripping, has been demonstrated at the US Department of Energy (DOE) Savannah River Site (SRS) in South Carolina. This process, using horizontal wells, is designed to concurrently remediate unsaturated-zone soils and ground water containing Volatile Organic Compounds (VOC). In situ technologies have the potential to substantially reduce costs and time required for remediation as well as improve effectiveness of remediation. Horizontal wells were selected to deliver and extract fluids from the subsurface because their geometry can maximize the efficiency of a remediation system and they have great potential for remediating contaminant sources under existing facilities. The first demonstration of this new technology was conducted for a period of twenty weeks. A vacuum was first drawn on the vadose zone well until a steady-state removal of VOCs was obtained. Air was then injected at three different rates and at two different temperatures. An extensive characterization program was conducted at the site and an extensive monitoring network was installed prior to initiation of the test. Significant quantities of VOCs have been removed from the subsurface (equivalent to an eleven-well, 500-gpm, pump-and-treat system at the same site). Concentrations of VOCs in the ground water have been significantly reduced in a number of the monitoring wells.

• Research Organization: Westinghouse Savannah River Co., Aiken, SC (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC09-89SR18035
• OSTI ID: 5624653
• Report Number(s): WSRC-MS-90-346; CONF-9105136--3; ON: DE92009906
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540250* -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
AIR
CHLORINATED ALIPHATIC HYDROCARBONS
CONTROL
EXTRACTION
FLUIDS
GASES
GROUND WATER
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
MONITORING
NATIONAL ORGANIZATIONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
REMEDIAL ACTION
SAVANNAH RIVER PLANT
SEPARATION PROCESSES
SOILS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
VAPORS
WATER
WELLS