Air sparging/soil vapor extraction apparatus

DETAILED DESCRIPTION What is claimed is: 1.
An apparatus for removing volatile contaminants from soil and groundwater, the apparatus mounted in a single bore hole in soil, the apparatus comprising: first, second and third concentric pipes, each having first and second ends; the first pipe extending a first length to the second end, the first end connected to a pressurized gas source for the discharge of pressurized gas from the second end of the first pipe; the second pipe concentrically surrounding the first pipe and extending a second length to the second end, the second length being less than the first length of the first pipe, the first end of the second pipe connected to a pressurized gas source for the discharge of pressurized gas from the second end of the second pipe; and the third pipe concentrically surrounding the second pipe and extending a third length to the second end, the third length being less than the second length of the second pipe, the first end of the third pipe connected to a low pressure source to extract air from the bore hole and soil immediately surrounding the bore hole.
2.
The apparatus of claim 1 wherein the second pipe has a length to position the second end of the second pipe immediately below the water table level in a bore hole.
3.
The apparatus of claim 1 wherein the length of the third pipe positions the second end of the third pipe above the water table level in the bore hole.
4.
The apparatus of claim 1 further comprising: a first cap closing the second end of the first pipe; and a second cap closing the second end of the second pipe, the second cap having an aperture allowing the first pipe to pass through the second cap.
5.
The apparatus of claim 1 further comprising: a third cap closing the second end of the third pipe, the third cap having an aperture allowing the second pipe to pass through the third cap.
6.
The apparatus of claim 1 further comprising: first means for spacing the first pipe from the second pipe; and second means for spacing the second pipe from the third pipe