Conductive Geomembrane

In-Line Plastics, LC

What are the benefits of using a Conductive Liner?

Conductive Liners have a proven record as one of the premier HDPE materials available. In addition to all of the normal benefits of using Herculine liners; superior performance in physical properties, resistance to stress-cracking and good long term performance, in both exposed and buried applications, Conductive Liner offers 100% post-installation inspection using an easy and economical method.

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Does the conductive layer change sheet properties or weld strengths?

There is no significant change in liner properties or weld strengths with the exception being carbon black content for the conductive layer is higher than remaining layers of the geomembrane.

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How is the carbon black content of the conductive layer monitored?

The conductive layer is produced from a pre-compounded material. During the manufacturing process, no other material is introduced into this layer, therefore the carbon content of the conductive layer is known prior to the production process.

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Does the spark damage the liner?

Since virtually no current flows, no heat is generated and the liner is not damaged.

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Does dirt or water on the liner invalidate the test?

A small amount of dirt or water on the liner surface typically has no effect on the spark test. However, when the spark test electrode come in contact with a conductor on top of the liner (such as water or dirt) with a sufficient surface area, that conductor can behave in the same manner as the spark test grounding pad and discharge through the sheet. as a result, there will be a false indication that there is a hole. In that case, simply remove the water or dirt and retest the area. If testing required over a fill material, other methods must be employed

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Could existing liners or new liners without the conductive layer be tested?

While it is technically feasible to do this type of testing on liner without the conductive layer, it is usually not practical.

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How can electrical continuity between liner panels be assured?

When adjacent panels are overlapped and fusion welded, the conductive surface of the top sheet of the overlap is welded to the nonconductive surface of the lower sheet. This arrangement leaves an open circuit between the two panels. When the grounding pad is on one panel and the electrode passes over a hole in the adjacent panel, a spark will bridge that open circuit between the conductive layers of the two sheets.

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Can exposed liner such as a pond be retested at future dates?

The conductive layer is a permanent part of the liner system and, after surface cleaning, the liner can be retested at any time to ensure integrity of the containment liner.

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How long will it take to conduct this test?

Typical test rates of 1 acre per day for hand-held units and 2 technicians; 2-3 acres per day utilizing an ATV setup with a 6 ft. wide brush and 2 technicians.

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Is there a minimum size defect that can be located by the test?

The very high voltages used in this system will locate the smallest defect.

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How can one be sure which is the conductive side of remnants and odd pieces?

A simple resistance on continuity test with a hand-held voltmeter will identify the conductive side.

In-Line Plastics, LC | (281) 272-1660 |  FAX (281) 272-1673
Toll Free (800)364-7688  | FAX (800) 449-5090

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