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Electric Liner Leak location for industrial ponds
April 4th, 2024
By Shawn Calendine Currently, one of the most widely used methods for finding breaches in impermeable geomembranes is the Electric Leak Location method (ELL), which is also known as Geoelectrical Integrity Surveys, or Geomembrane Integrity Surveys. With the development and eventually large-scale use of geosynthetics across the industrial landscape, the subsequent need to ensure their integrity produced […]
New GSI test method for resistance of conductive geosynthetics
June 1st, 2022
The Geosynthetic Institute (GSI) has a new test method for resistance measured across positions on conductive geosynthetics. Conductive geosynthetics contain an electrically charged backing (usually a thin layer of polyolefin with letdowns containing 20%–30% carbon black) that allows leaks to be detected in lined systems without the need for a conductive subgrade beneath the liner […]
Electrical leak detection at depth
February 1st, 2022
Q: I am taking the opportunity to ask a question about the electrical leak detection (ELD) test for geomembranes: We have the area covered with silt from the past rainy season, and it is estimated to be about 5 feet (1.5 m) deep worst-case scenario. The liners in this area were not properly inspected and […]
ASTM International releases new standard for electrical leak location in geomembranes
September 25th, 2019
ASTM International has released a new standard, ASTM D8265-19 Standard Practices for Electrical Methods for Mapping Leaks in Installed Geomembranes. These practices describe standard procedures for using electrical methods to locate leaks in geomembranes covered with liquid or earthen materials, which can be watered to cause leakage through the geomembrane. For more information or to […]
GMA and IGS-NA to host webinar on leak detection sensitivity
April 5th, 2019
The Geosynthetic Materials Association (GMA) and IGS North America (IGS-NA) will sponsor a webinar, “Leak Detection Sensitivity — What Does It Mean?” on April 16, from 1 p.m. to 2 p.m. EDT. The ASTM standardized methodologies detail leak detection sensitivity testing for the various electrical leak location (ELL) methods. The term “sensitivity testing” is misleading, since […]
TRI Environmental hosting Short Course Training Week in April
March 11th, 2019
TRI Environmental will sponsor Short Course Training Week in Austin, Texas, April 7–12. The training week includes multiple courses with optional certification, including the following. Liner integrity surveys/assessments (LISA) April 7 Electrical leak location (ELL) surveys are the state-of-the-art nondestructive method of locating leaks in installed geomembranes. The Liner Integrity Survey and Assessment (LISA) course […]
IGS-NA news
April 1st, 2018
The following are highlights of the many initiatives of IGS-NA over the last few months. IGS-NA supports Geosynthetics 2019 The North American Chapter of the International Geosynthetics Society (IGS-NA) is proud to support the Geosynthetics 2019 conference, which is organized by the Geosynthetic Materials Association, to be held Feb. 10–13, 2019, at the Marriott Marquis […]
NEWS ALERT: GMA waste containment seminar sponsorship opportunities available
March 26th, 2018
The Geosynthetic Materials Association (GMA) is hosting the seminar “Waste Containment System Design II: Landfill Design Considerations,” April 17–18, 2018, at the Crowne Plaza in Syracuse, New York. The seminar is expected to draw more than 100 design engineers, construction supervisors, landowners and operators, exhibitors, regulatory agency staff, and public works and municipal engineers. A […]
Readers question ‘zero leaks’
October 1st, 2017
To the editor: Efforts toward achieving zero leaks in a waste containment system (“Achieving Zero Leaks on a Budget” in the June/July issue of Geosynthetics) are certainly laudable. Authors Gilson-Beck and Toepfer do a good job of explaining how electrical leak detection surveys can minimize leaks in a geomembrane liner system at the end of […]
Achieving zero leaks on a budget with geomembranes
June 1st, 2017
For more than 30 years, the geomembrane industry has been told that “all geomembranes leak” (Giroud 1984), as if this were some foregone conclusion no matter what might happen from geomembrane manufacturing to the time it is put into service. But recently, the idea of “zero leaks” has been a hot topic at industry conferences, […]