Dipole Method

1,863,500 m²

Project sizes ranging from 100 m² to 284,900 m², totaling 1,863,500 m²

Average of 4.4 leaks / hectare on HDPE and PVC geomembranes

6 out of these 75 projects had more than 20 leaks /hectare

Out of the 37 projects that had constant third-party CQA on-site, 18 had leaks

Water Puddle Method

1,409,500 m²

Project sizes ranging from 20 m² to 253,000 m², totaling 1,409,500 m ²

Average of 6 leaks /hectare on HDPE, PVC and bituminous geomembranes

11 out of these 58 projects had more than 20 leaks /hectare

Out of the 27 projects that had constant third-party CQA on-site, 25 had leaks

Leak Location General Statistics

21.41 %

More than a third of our dipole projects had at least one large leak (>50 cm²)

The most leaks found on a single project was 203 leaks with the water puddle method and 396 leaks with the dipole method.

Leaks as small as 6 mm and as large as 12 m x 20 m were located and excavated in evaporation ponds in Chile

In 2014, only 21.41% of all geomembrane installed in the province of Quebec was tested using ELL methods, on which 105 leaks were found