Electrical Leak Location Services: Tests & Capabilities


TRI Electrical Leak Location Services, a division of TRI Environmental, Inc., provides a complete set of resources to help our clients test the integrity of their installed geomembrane lining systems in a variety of containment applications, such as for landfills, potable and waste water installation, and secondary containment for fuel storage and tank farms. Our powerful, standards-compliant methods & equipment are unrivaled for locating leaks in installed geomembranes in a variety of conditions, including exposed and soil or water-covered. We can provide equipment & training for you to perform your own in-house surveys or to add surveying to your company’s current service offerings.

With over 110 million square feet (1,020+ hectares or 2,500+ acres) and over one hundred projects of performing electrical leak location methods, our multi-lingual staff is available for education and training anywhere in the world. From hands-on field training to operator certification to classroom instruction, we will provide you with the tools you need to understand, implement and troubleshoot electrical leak location survey applications.

Our Liner Integrity Survey and Assessment (LISA) electrical leak location equipment has been subjected to years of research, development and field testing. The LISA equipment is available for sale on a project-specific basis.

Because TRI Liner Integrity Services is home to a complete suite of geomembrane liner integrity research, services, training and state-of-the art equipment, our clients move forward with confidence. Whether you are interested in becoming a certified Electrical Leak Location Surveyor or simply need someone to perform a survey for you, TRI has the means to make you successful!

Liner Integrity and Leak Location Surveys

TRI Environmental performs Electrical Leak Location Services surveys using the most advanced equipment available, with superior quality control and documentation. Surveys are managed and supervised by Abigail Gilson, M.S., P.E. Ms. Gilson works openly and honestly with her clients, helping to educate them in the methods and showcasing their abilities as well as limits.

TRI electrical leak location equipment operators go through the rigorous T-CLIC certification process.

Survey Methods

Electrical Leak Location Surveys can be performed on bare geomembranes as well as geomembranes covered with earthen materials, water or wastewater. Electricity is introduced above the geomembrane and grounded to the subgrade below the geomembrane. Since geomembranes are electrically isolative, the methods track the electrical current travelling through holes in the geomembrane. The current is tracked differently depending on whether the geomembrane is covered or exposed.

For bare geomembranes, water is sprayed onto the geomembrane to carry the applied current, or a high voltage is introduced above the geomembrane to create an electrical arc in the presence of a leak. The following ASTM Methods have been developed for Electrical Leak Location Surveys:

Guidance for Method Selection: ASTM D6747 “Standard Guide for Selection of Techniques for Electrical Detection of Potential Leaks in Geomembranes”

Bare Geomembrane

ASTM D7002 Standard Practice for Leak Location on Exposed Geomembranes Using the Water Puddle System. Also applicable to water lance.
ASTM D7703 Standard Practice for Electrical Leak Location on Exposed Geomembranes Using the Water Lance System
ASTM D7953 Standard Practice for Electrical Leak Location on Exposed Geomembrane Using the Arc Testing Method
ASTM D7240 Standard Practice for Electrical Leak Location using Geomembranes with an Insulating Layer in Intimate Contact with a Conductive Layer via Electrical Capacitance Technique (Conductive-Backed Geomembrane Spark Test)

Covered Geomembrane

ASTM D7007 Standard Practice for Electrical Methods for Locating Leaks in Geomembranes Covered with Water or Earth Materials



Liner Integrity Surveys are used to locate leaks in installed geomembrane containment structures such as:

  • Landfills
  • Reservoirs
  • Liquid Impoundments
  • Heap Leach Pads
  • Leachate Ponds
  • Wastewater Lagoons
  • Lined Tanks
  • Secondary Containment for Fuel Storage