WORK PLANS_FILE 2 - Laserfiche WebLink

Home Browse Search

02 September 2010 AGE-NC Project No. 95-0184 Page 7 of 7 The upper portion of the treatment chamber is also designed as a sieve with uniformly distributed openings to allow for volatilization of the ground water. The pick up tube from the base of the well extencj¢hrough the upper portion of the extraction chamber. The pick up tube spli"nd are equal distances from the ambient air supply pipe. The pick up tube extendjo the base of the well casing or the desired depth for ground water extraction. The bifurcated pick up tubes connect to and pass through the treatment chamber. The walls of the pick up tubes are exposed to the inside of the treatment chamber, which additionally have holes of a regular size and distribution in the sides of the pipes.The holes I rc' provided with air inlet openings in the region of the chamber underneath the upper portion of the extraction chamber wall;this forms the whole of the treatment chamber. Air which flows through the air inlet and out of the chamber into the pick up tubes, produces a suction which aspirates the ground water upwards.>T-Che extraction water is transported upwardly through the treatment chamber region (well casing). If required, a partition in the form of a packer can be installed in the lower portion of the well casing, through which the pick up tube extends. This could be installed if deep ground water was the target for extraction below the packer depth. Instead of the pick up tubes exposed to the inside of the treatment cell, it is also possible to provide for an individual pick up tube with a cross-section shaped as a hollow ring segment or wire wrapped. However, the technique which creates the superior air lift will be utilized, following start up. Reinforced circulating movement of the ground water develops through the pick up tubes in the treatment of the well casing and water is identified p-eatment discharge.A part of this discharge flow is discharged outwardly in direction he casing and filter pack, while another portion of the water volume moves in the direction downwardly. Ground water circulation through the treatment area is reinforced and simultaneously, with a vertical ground water movement to the surrounding area of the well casing {s amplified. Figure 3 illustrates an example of in-well air stripping technology implementation. Advanced GeoEnvironmen[al,Inc.