• Liner integrity and leak location surveys on uncovered, soil-covered, waste-covered and liquid-covered liners including GCLs; largest survey - 630,000m², deepest surveys - 5m MSW, 18m industrial sludge
  • Mapping concentrations and sources of greenhouse gasses (methane, other hydrocarbons, and carbon dioxide) above landfills - approximately 40 acres per day (16 ha/day)
  • Flaw location and NONDESTRUCTIVE seam strength assessment using infrared thermography. Only I-CORP provides this unique service
  • Non-contact Airscan ultrasonic testing
  • Guidance on underliner leak monitoring systems
  • Instructing surveyor certification course
Leak Location Technologies (pdf brochure)

I-CORP’s staff have been performing liner integrity and leak location surveys since 1987. They have been performing plastic pipe, geomembrane, and seam failure analyses since 1981, and have been performing liner CQA since 1982. Consequently, I-CORP has developed the most appropriate, cost-effective, integrated suite of mobile technologies for locating leaks and flaws in lining systems in the industry worldwide, suitable for both CQA and problem resolution applications. These five technologies include:

1. Applied Potential Electrical Method


- Wading Probe
- Drag Probe

Slopes and/or Exposed Liner

- Water Lance

Soil Covered

- Handheld Probe (Dipole or Single Pole)


2. Infrared Spectrometry (IRS)

3. Acoustic

4. Streaming Potential

5. Infrared Thermography (IRT)

To learn more about these five technologies, please go to I-CORP INTERNATIONAL's Leak Location Technologies brochure (pdf).

Landfill Gas Surface Monitoring

As USEPA's concerns over greenhouse gasses emitted from landfills increase (CFR 61, 12 March '96), I-CORP has built upon its expertise of locating leaks in geomembrane liners electrically to measure geomembrane seam strength nondestructively using infrared (IR) thermography, and by offering IR technology for rapidly and accurately mapping these gasses.

Methane, total non-methane hydro-carbons, and carbon dioxide distributions and their sources are accurately and rapidly mapped using a non-dispersive gas correlation infrared spectrometer using an "open path" sample cell with an effective length of 8 ft (2.6 m) in conjunction with a GPS survey system.

Sensitivity is less than 0.1 ppm when analyses are made each second. Up to 100 readings per second can be taken as the equipment is traversed across the landfill cap. Thus, measurements are made instantaneously on a continuous basis, not only at isolated grid pattern nodes.

Smaller and moderate sized landfills can be quickly surveyed from the ground while very large areas may be surveyed rapidly and cost effectively by helicopter. The same technology has been used to survey gas transmission lines for leaks from the air at 300 miles (460 km) per day, and by ground vehicle at about 120 miles (200 km) per day.

Depending on topography, landfill areas of 40 acres (16 ha) or more can be surveyed in one day. Complete maps, showing locations of plumes, concentrations of the individual gasses, and their sources can be provided on site within one hour of completion of the survey. Major leaks and anomalies can be identified in real time.

Use this technology for the final stage of cap construction quality assurance, for periodic monitoring of LFG emissions and LFG collection efficiency, to source known leaks (water in, gas out) in caps and piping systems, to evaluate geomembrane damage after slope soil instability events, to monitor cap integrity after differential settlement, and to monitor bioremediation processes.

Rapid landfill gas mapping by infrared spectrometer, and the location of leaks in landfill caps, complement the following technically advanced but cost-effective services available from I-CORP:

  • Electrical leak location surveys on uncovered, soil/waste-covered, or liquid covered liners.
  • Forensic/failure analyses and expert witness services for litigation and public hearings.
  • Nondestructive assessments of geomembrane seam strength and internal integrity. Soon there will be no need to cut holes in geomembranes for quality control/quality assurance testing purposes.

Contact I-CORP INTERNATIONAL and tell us about your landfill gas surface monitoring needs.


6072 North Ocean Blvd., Ocean Ridge, Florida 33435 USA
phone: +1 561 369 0795
fax: +1 561 369 0895