Leak Location Services

We’re an international company specializing in Electrical Leak Location Surveys of Geomembranes. We have over 27 years of experience and deliver first-class surveys for our clients worldwide. Geomembrane Leak Location Surveys

The entire submerged geomembrane was systematically scanned by two LLSI technicians using a custom designed probe. Seven leaks were found in the geomembrane of the lagoon.  The located leaks were marked with weighted bags connected to floats on a string line. The location of the leaks were also referenced to measurement marks placed on the side slope above the water line. Shallow Water Survey

Geomembrane leak location surveys of surface impoundments and tanks can be conducted with water covering the geomembrane. Surveys are conducted using a probe while wading or standing on the side slopes, or using a sensor that is towed across the impoundment. Procedures for this method are specified in ASTM standard D7007. Water Surveys

Damage caused by heavy machinery while installing earth materials on geomembranes is the most significant cause of damage to geomembranes. A geoelectric leak location survey of the soil-covered geomembrane of a newly constructed landfill is a very cost-effective method for finding leaks that occur while placing a protective soil cover over the geomembrane liner. Soil Surveys

In addition to manual leak location surveys, an Electrical Leak Imaging and Monitoring (ELIM) system can be permanently installed to monitor for leaks in the landfill liner. The ELIM system uses a series of electrodes placed on top of or underneath the geomembrane liner during liner installation. Leak Monitoring

To avoid the logistics of flooding the geomembrane with water, the exposed geomembrane can be tested for leaks using a water puddle test. This test is used on geomembranes that are in direct contact with the supporting sub-grade or a GCL. Procedures for this method are specified in ASTM standard D7002.The bare liner test is to detect electrical current flowing through a hole in the geomembrane liner using a small amount of water that is temporarily placed in contact with the liner using a squeegee. Bare Line Surveys

To avoid the logistics of flooding the geomembrane with water, the exposed geomembrane can be tested for leaks using a water puddle test. This test is used on geomembranes that are in direct contact with the supporting sub-grade or a GCL. Procedures for this method are specified in ASTM standard D7002.The bare liner test is to detect electrical current flowing through a hole in the geomembrane liner using a small amount of water that is temporarily placed in contact with the liner using a squeegee. Bare Liner Surveys

Surveys with soil on the liner are conducted by making point-by-point electrical measurements on the soil. The data is recorded in a portable data acquisition logger and then downloaded to a portable computer for processing and data analysis in the field. Soil Surveys

Geomembrane leak location surveys of surface impoundments and tanks can be conducted with water covering the geomembrane. Surveys are conducted using a probe while wading or standing on the side slopes, or using a sensor that is towed across the impoundment. Procedures for this method are specified in ASTM standard D7007. Water Survey