Liner Integrity Services: Tests & Capabilities

With over 190 million square feet (1,760+ hectares or 4,300+ acres) of experience in performing electrical leak location surveys since 2004, TRI’s staff brings a wealth of experience to your project to ensure effective method application.

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 semi conductive layer 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.

TRI performs Electrical Leak Location 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 limitations in order to improve method implementation.

ASTM Standardized Methods

TRI Environmental is integrally involved in the ASTM committee to improve and standardize test methods. The currently standardized guides and practices relevant for electrical leak location testing are listed below. TRI is qualified to perform all of these standard practices.

ASTM D6747 Standard Guide for Selection of Techniques for Electrical Detection of Leaks in Geomembranes
ASTM D7002 Standard Practice for Leak Location on Exposed Geomembranes Using the Water Puddle System. Also applicable to water lance.
ASTM D7007 Standard Practice for Electrical Methods for Locating Leaks in Geomembranes Covered with Water or Earth Materials
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)
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 D8265 Standard Practice for Electrical Methods for Mapping Leaks in Installed Geomembranes



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