Page 13 - Envirotubes Dewatering Manual

Site Preparation (cont.)
the best way to return the water or relocate it is by gravity.
If the water is to be pumped back to the body it came from or elsewhere, caution must be taken to handle the large volumes of water the Envirotubes® produce during dewatering. CaUtiOn: Large volume surges of water will result from a sudden release.
Normally a pit or sump will be dug at the low point. this is then lined with a plastic tarp. the blue tarp from a building supply works well in most situations.
the underlayment plastic is then placed so that it overlaps the tarp in the sump.
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