In situ immobilization of subsurface contamination
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United States of America Patent
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Mar 2, 2010
Issued Date -
N/A
app pub date -
Nov 28, 2006
filing date -
Nov 28, 2005
priority date (Note) -
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Abstract
Vertical migration of a plume of subsurface contamination in the vadose zone to the groundwater is prevented by forming and maintaining one or more desiccation layers in the vadose zone in or above a layer of contamination. Horizontal barrier layers are produced by injecting dry air at a specific elevation in one borehole and removing the air at another borehole. These horizontal layers act as an impermeable barrier to the vertical migration of dissolved contaminants.
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