An International Company Specializing in Electrical Leak Location Surveys of Geomembranes

Geomembrane Leak Location Survey

LLSI utilizes ASTM D6747, D7002, D7007, D7240, and D7953 testing, so you can enjoy quality control and assurance.

Don't leave leaks behind.

Over half a billion square feet surveyed.

Change the focus from testing the seams that almost never fail to locating actual damage and leakage through the geomembrane.

LLSI by the Numbers:

  • More than 3,517 leak location surveys for over 517 million square feet of geomembrane.
  • In 2017 alone, LLSI completed 134 geomembrane leak location surveys for more than 23,769,076 square feet (545 acres) of geomembrane.
  • Over the last three years, LLSI has surveyed 95,474,400 square feet (2,192 acres) of geomembrane.

Geomembrane Leak Location Survey

Our Method

Geomembrane Leak Location Survey The electrical leak location method is a powerful tool used to detect electrical paths through leaks in a geomembrane liner. A voltage is applied to an electrode placed in the soil or water covering the liner and to an electrode placed in the leak detection zone for double-lined systems or connected to earth ground for single-lined systems. Because the geomembrane liner is an electrical insulator, current will flow only through leaks in the liner. This current produces localized anomalous areas of high current density near the leaks. Electrical measurements are then made on the soil or in the water to locate these points of current flow through the leaks. ASTM D6747 describes the various implementations of the method. The electrical leak location method is suitable for liquid impoundments and tanks, as well as pre-service inspection of solid waste landfills. Electrical leak location surveys are conducted on the primary or secondary geomembrane liners with water or soil covering the liner. Surveys with soil on the liner are important to detect leaks caused by machinery used to emplace the soil cover. With proper site conditions and survey procedures, the electrical leak location method can detect and locate 0.001 square inch (0.6 square mm) leaks in liners covered with water and 0.04 square inch (26 square mm) leaks in liners covered with 2 feet (600 mm) of soil.