Patent ID: 9289806
Filing Date: 2016-03-22
CPC Classification: B09C

Claim Text:
1. A system for intercepting, treating and venting of soil gas from contaminated soil in a vadose zone that extends downwardly from a ground level to a water table, comprising: at least one borehole with a top end at said ground level, a spaced bottom end above said water table and an inwardly facing outer wall of said soil extending downwardly from said top end to said bottom end, said borehole defining a borehole cavity, said top end being open to atmosphere above said ground level to allow unimpeded flow of gases, a gas permeable liner in said borehole against said outer wall and around said borehole cavity from said top end to said bottom end to reduce and prevent fine grain particles in said soil migrating into said borehole cavity, and porous fill material inside said liner and filling said borehole cavity, whereby variations in atmospheric barometric pressure pull said soil gas from said soil to said borehole cavity and out said top end of said borehole.