Does geoelectric leak location work? Yes.
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| Here is a 2mm puncture hole located under a 150 mm layer of sand and a geocomposite. |
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| The puncture, from the underside, was made by a stone between the geomembrane and the thick horizontal flange of a prefabricated sump. |
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| How large was the stone? Not very, about half the size of a 1 cent coin, but it was angular. |
