LINER
LEAK LOCATION
- 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
Liquid
- Wading Probe
- Drag Probe
Slopes and/or Exposed
Liner
- Water Lance
Soil Covered
- Handheld Probe (Dipole
or Single Pole)
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2.
Infrared Spectrometry (IRS)
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3. Acoustic
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.
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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.
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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.
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