Patent ID: 6979150

Claim:
An enhanced passive soil vapor extraction system for remediating a site of specified locale that contains soil contaminated with volatile chemicals comprising: a deep well having an upper and lower end, the deep well having a specified depth and position relative to the contaminated site; one or more injection wells each having an upper and lower end, each injection well having a specified depth and location relative to the contaminated site, the lower end of the injection well being in fluid communication with the surrounding soil; a transfer conduit having a first and second end, a portion of the first end of the transfer conduit being coupled to the upper end of the injection well, the second end of the transfer conduit being coupled to the upper end of the deep well; one or more extraction wells each having an upper and lower end, each extraction well having a specified depth and location relative to the contaminated site, the upper end of the extraction well extending to the land surface, the lower end of the extraction well being in fluid communication with the surrounding soil; a means for preventing chemical migration of the chemicals horizontally and downward, the means creating a boundary around the contaminants; and wherein the depth of the deep well provides a great enough pressure differential between the deep well and contaminant site to produce air movement from the deep well, through the system and into the waste zone.