Storm Pond

SENSOR DDS® technology applied to Storm pond in gold mine

Storm Pond is a pond for collection of rainwater at mining plants or other industrial zones. Usually the water contains some amount of the hazardous chemicals or other liquid what needs to be stored properly.

For that reason, waterproof geomembrane is installed at these ponds to prevent underground pollution. Integrity of such geomembrane must be tested after its installation. Geomembrane damage caused by transport or its installation process will be detected and fixed to assure 100% geomembrane waterproofing.

SENSOR DDS® MIT Arc Testing at Storm pond at Asian gold mine

General project info:

  • Area tested was 72 000m²
  • Two layers of HDPE 1.5mm geomembrane installed
  • Sensor leak detection geotextile with geogrid was installed between geomembranes
  • Compacted clay as subgrade
  • We used SENSOR DDS® MIT Arc Tester to test geomembrane integrity of whole surface of the Storm pond

At this project we have located 67 leaks in secondary geomembrane and 45 leaks in primary geomembrane. Whole survey was conducted during the nights due to high daily temperatures. Such low visibility would cause problems in commonly water based detection methods such as water puddle or water lance but thanks to our reliable audio-visual alarm we were able to detect and locate even pinholes.

The daily average productivity was 8 500m² per operator per day. We deployed 2 operators so the whole surface of each geomembrane was completed in 4-5 days. The high number of the leaks were identified as cuts mostly caused by installation tools. Damaged extrusion welds and hot wedged welds were other common faults of the geomembrane at this project.

Example of SENSOR DDS® MIT Arc Tester surveys at Storm ponds

Always both layers of geomembrane are tested for leaks at Storm Ponds.

Gold mine’s water in Storm Pond often contains dangerous chemical residuals therefore leak test is obligatory

Sensor DDS® technology allows us to test exposed liner at Storm Pond or when full of liquid

Bare liner testing at Storm Pond during maintenance is part of overall QC process

Layered between two geomembranes at this Storm Pond is our fixed SENSOR DDS system allowing 24/7 monitoring

One operator can test 10.000m² of geomembrane a day depending on number of leaks found

Even testing in water using SENSOR DDS® technology is common in Storm Ponds

In order to test integrity of both primary and secondary geomembrane at Storm pond, the Sensor leak detection geocomposite must be installed in between