Hydraulic and earth engineering – Earth treatment or control
Patent
1996-11-18
1997-08-12
Ricci, John A.
Hydraulic and earth engineering
Earth treatment or control
166306, E02D 300, E21B 4300
Patent
active
056558520
ABSTRACT:
Disclosed is a process and apparatus for removing contaminants from a contaminated area of the ground, the ground having a plurality of paths of preferential flow at different depths, which process comprises providing a borehole in the contaminated area to intersect at least a first path of preferential flow and a second path of preferential flow; placing in the borehole a first vacuum extraction pipe having a bottom opening situated within the first path of preferential flow and a second vacuum extraction pipe having a bottom opening situated within the second path of preferential flow; isolating the first path of preferential flow from the second path of preferential flow so that a vacuum applied to the first vacuum extraction pipe will extract gases and liquids from only the first path of preferential flow, and a vacuum applied to the second vacuum extraction pipe will extract gases and liquids from only the second path of preferential flow; applying a vacuum to at least one of the vacuum extraction pipes to draw gases and liquid from at least one of the paths of preferential flow into a vacuum extraction pipe and transport the gases and liquid to the surface as a common stream; forming from the common stream a stream which is liquid and a stream which is gaseous; and removing contaminants from the liquid and/or gaseous streams.
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Duffney Eliott N.
Hess Ronald E.
Huber Scott M.
Tornatore Paul M.
Ricci John A.
Xerox Corporation
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