The Allied Leak Location System is used on the soil covering on a newly laid geomembrane in a landfill site. Damage can be caused to the geomembrane by the heavy earth moving machinery during construction. The Allied Leak Detection System is a cost effective method of leak location minimizing the amount of material which must be removed to locate the leak and repair the geomembrane.

The method of surveying is to apply a high voltage
between the inner soil on top of the geomembrane and the ground outside of the liner. The liner is an insulator, but if there are cuts or holes within the geomembrane, the current will flow through these holes creating areas of voltage gradient nearby as is concentrated into a small area. A portable survey frame with a Data Logger connects to two non-polarizing electrodes is used to record voltages which can be downloaded to a computer with the supplied windows software. Results may them be plotted using Window Excel or Surfer.

This technique is capable of finding holes as small as 3mm in the geomembrane with about 0.5 meters of soil covering. The High Voltage Power Unit supplies up to 700 Volts which can inject current into all but the driest soil.