Patent ID: 7287932
Filing Date: 2007-10-30
Classification: B09B,E03F

Abstract:
1. A ballasting system for an on-site sewage treatment and disposal system for areas having a ground water level above a minimum depth below grade comprising a perimeter barrier arranged around a selected subterraneal volume within a ground area, said perimeter barrier having a circumference and a closed end closest to atmosphere; a pump having a gas intake and a discharge side which discharges gas at a pressure greater than atmospheric pressure, the discharge side of the pump being in fluid communication with the selected subterraneal volume to lower the ground water level within the perimeter barrier to a level at or below the minimum depth below grade; a flexible membrane located adjacent the perimeter barrier end and within the ground area, wherein the flexible membrane extends over substantially the entire circumference of the perimeter barrier; and a plurality of ballasting beams located above the flexible membrane and within the ground area, wherein