Soil gas system and method

摘要

A system for intercepting, treating and venting of soil gas from contaminated soil includes a borehole with an open top end, a porous liner against the outer wall of the borehole and porous fill material inside the liner. The fill material can include materials to retard and degrade contaminants in the soil gas. The system can include a slotted aeration tube in the borehole, vegetation planted in the open end of the borehole, impermeable sections in liner, and impermeable ground cover around the top end of the borehole. A method for intercepting, treating and venting of soil gas from contaminated soil includes the system and pulling soil gas out the top end of the borehole with variations in atmospheric barometric pressure.

主权项

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.