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Bare Liner – Water Lance

Image of a leak location specialist holding a water lance leak detection device. Image by Shawn Calendine

he ‘Water Lance Method’ is typically used on uneven surfaces, extreme slide slopes, vertical walls, and can tolerate slightly wet and dirty sites. This method uses the same principle as previously; an induced electric current generated above the liner and grounded to the subgrade. In this case the mobile detection device consists of a lance or wand (tube), specialized ohm meter, pressure nozzle, and hose.