System for the removal of contaminant soil-gas vapors
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United States of America Patent
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Dec 16, 1997
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N/A
app pub date -
Dec 7, 1995
filing date -
Dec 7, 1995
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Expired
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Abstract
A system extracts contaminated vapors from soil or other subsurface regions by using changes in barometric pressure to operate sensitive check valves that control air entry and removal from wells in the ground. The system creates an efficient subterranean flow of air through a contaminated soil plume and causes final extraction of the contaminants from the soil to ambient air above ground without any external energy sources.
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