Method of in situ decontamination
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United States of America Patent
Stats
-
Nov 3, 1992
Issued Date -
N/A
app pub date -
Apr 19, 1991
filing date -
Aug 10, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of removing volatile contaminants from a layer of contaminant lying on the top of a water table and in an unsaturated zone including opening a hole into the unsaturated zone and downwardly to at least the top of the layer of contaminant, positioning the end of a solid, air impermeable hollow pipe into the hole and adjacent to air permeable fill material, establishing an airtight seal around the pipe at the hole, reducing the pressure in the pipe in the hole to cause air and contaminant vapors to flow along the layer of contaminant and through the unsaturated zone and into the hole and through the air permeable fill material, and removing air and contaminant vapors from the hole through the pipe.
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