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I <br /> Historical Background <br /> i AGE-NC Project No 99-0559 <br /> Page 4 of 4 <br /> ON-SITE GROUND WATER REMEDIATION <br /> A remediation enclosure and fencing for the ground water treatment system was installed on the <br /> I south side of the building on the site Well EW 1 through EW-4(4-inch diameter) polyvinylchlonde <br /> (PVC)groundwater extraction wells were utilized for remediation AGE installed 3 5-inch diameter, <br /> stainless steel Geotech model 3 5 Auto-Reclaimer pneumatic powered,down-well pumps at a depth <br />' of approximately 75 feet bsg in each of the wells A low flow ground water remediation system was <br /> installed, consists of one 500-gallon poly tank with process pump, a inline sediment filter chamber <br /> and four 1,000-gallon Granular Active Carbon media vessels Waste water is discharged to the City <br />' of Stockton sewer system under permit The remediation system is depicted on Figure 3 <br /> 1 <br /> I � <br /> I <br /> I <br /> I <br /> I <br /> Aavanced GeoEnvironmentai,Inc <br />