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K

K is the symbol synonymous with permeability of soil and is a measure of the rate at which soil or rock allows water to pass through it. Low permeability soils can allow pore water pressures to build up during consolidation which if uncontrolled can lead to failure.

Knock-out pot - pumped

Comprises a chamber into which the landfill gas expands and the velocity reduces. The resulting condensate then drains into the reservoir through a central tube which contains a permanently installed leachate pump (e.g. GeoPump). As the level of the condensate rises the pump will automatically start pumping until the reservoir is empty.

Knock-out pot - siphon

Comprises a chamber into which the landfill gas expands and the velocity reduces. The resulting condensate then drains into the reservoir through an internal tube and as the level rises will drain back into the surrounding waste.