Hydraulic and earth engineering – Soil remediation – In situ contaminant removal or stabilization
Patent
1993-01-27
1994-07-26
Corbin, David H.
Hydraulic and earth engineering
Soil remediation
In situ contaminant removal or stabilization
405258, B09B 100
Patent
active
053323335
ABSTRACT:
Volatile contaminants are removed from the vadose zone of contaminated earth by vacuum extraction through a borehole placed into the contaminated area. Means are provided for substantially trapping water within the extraction borehole so as to prevent contaminated water from being brought to the surface. Means are also provided for maintaining substantially atmospheric pressure at the bottom of the extraction borehole so as to prevent water from the water table from rising into the borehole and to allow improved circulation of air through the contaminated zone.
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