Method of removing and controlling volatile contaminants from the vadose layer of contaminated earth

Patent · Tue Mar 15 00:00:00 EST 1988

OSTI ID:5119001

Payne, F C

A method of recovering and controlling a volatile contaminant from a vadose layer of contaminated earth is described comprising the steps of: establishing a first borehole in the contaminated earth, establishing a second borehole spaced from the first borehole in the contaminated earth and which terminates in the vadose layer; positioning a first conduit in the first borehole, positioning a second conduit in the second borehole, packing a fill material about each first and second conduit in their respective boreholes; operatively connecting the first and second conduits by a third conduit wherein the first conduit is in fluid flow communication with the second conduit; positioning means of neutralizing the volatile contaminant along the third conduit in flow communication therewith; positioning first pump means for drawing gasses from the contaminated earth in flow communication with the first and second conduits; activating the first pump means wherein gas is drawn out of the vadose layer to create an area of substantially reduced pressure which causes substantial quantities of the volatile contaminant to vaporize and be drawn up through the first conduit into the neutralizing means to produce clean air; positioning a second pump means between the neutralizing means and the second conduit positioning a cover formed of fluid impervious material atop the ground level about each borehole.

• Assignee: Midwest Water Resource, Inc., Charlotte, MI
• Patent Number(s): US 4730672
• OSTI ID: 5119001
• Resource Relation: Patent File Date: Filed date 4 Mar 1987
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
SOILS
CLEANING
FLUID INJECTION
LAND POLLUTION
VOLATILE MATTER
LAND POLLUTION CONTROL
BOREHOLES
DEGASSING
EVAPORATION
INJECTION WELLS
PH VALUE
POLLUTANTS
REMOVAL
CAVITIES
CONTROL
MATTER
PHASE TRANSFORMATIONS
POLLUTION
POLLUTION CONTROL
WELLS
510200* - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)