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.