Geomembrane Liner for Dewatering Operation

by Sally Jackson
(New Jersey, USA)

We are dewatering and need a geomembrane liner about 24' x 24' to be placed on a concrete pad which will liner the floor and then fit up over jersey barriers to make a containment area. We need this to handle some of the extra water from our system and it may have a lot of silt and possibly oily sheen.

From my estimation I think we will need 36' x 36' to make the system work. Can you make a field fit kit like that with a liner material that will work for 3-5 years?

Is there something else we can consider using / doing?

Thank you.

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Hello Sally - thanks for the inquiry.

I think you need to place a 6 mil liner down as underlayment, then Geogrid ( to ensure you get filtration as it creates space/gaps between the liner and non-woven filter) and then use a 6 oz or 8 oz non-woven geotextile to line the dewatering work area. Around the perimeter of the work area (under the edge of the 6 mil) place sand bags or similar to raise the height, and then where you are chanelling the water to, eliminate a bag so the water flows out to your basin.

I do recommend using polymer - PAM and also doing a bench-scale test to make sure your pump and dewatering rates tie up.

I have sent you a quote on the materials and we can go through it in more details and how you can go about dewatering.

You could achieve the same by considering our line of
• Dewatering Filter Bags.

We look forward to working with you.

Granite Environemntal Inc