After considerable time and effort, our research and development team has released a new version of our popular non-aqueous phase liquid extraction technique (NET)TM system fit for installation in explosion-proof environments. The NET systems utilize a specially extruded oleophilic/hydrophobic fabric capable of adsorbing non-aqueous phase liquids (NAPLs), also known as free-product, with a 99% efficiency. The fabric is conveyed in a continuous loop into a monitoring or recovery well to intercept the oil-water interface. As the fabric travels through the interface, product is absorbed. The absorbed product is desorbed in a stainless-steel de-sorption unit and the recovered product is gravity drained into a storage drum or tank. The NET systems are fast gaining popularity as the only option for recovery of NAPLs from subsurface environment that pose fluctuating water-table conditions. The system can be installed for recovery of free-product from wells as small as 2-inch in diameter. The system can be installed in a below-grade vault for flush-to-grade installations. Optional features include a mini-storage tank for conveyance of the recovered product to a remote location, telemetry, alternative energy supply, and other ancillary services. This version of the NET unit is equipped with a stainless steel housing with a direct flex-coupling to minimize maintenance normally associated with chain-drives.

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