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i 1 <br /> 31 January 2000 <br /> . AGE-NC Project No 96-0235 <br /> Page 3 of 4 <br /> 33 IN-SITU AIR SPARGING TEST <br /> To determine the feasibility of remedial options at the site, AGE will perform an IAS pilot test The <br /> duration of the pilot test will be approximately 96-hours (4 days) <br /> The IAS pilot test will be conducted by injecting air Into the sparging well using a compressor-driven <br /> unit Several parameters, Including radius of Influence, sparging rate, sparging vapor concentrations, <br /> ground water depths and dissolved oxygen, will be measured or determined from data collected at` <br /> surrounding wells Results of the IAS pilot test will be used to prepare a Corrective Action Plan <br /> (CAP) Procedures for performance of the IAS pilot test are included in Section 4 1 <br /> s <br /> 3 4 GROUND WATER EXTRACTION TESTS <br /> Two limited ground water extraction (pump) tests will be performed to determine the viability of <br /> ground water extraction at the site One test will be performed at the former UST No 3 location and <br /> one test will be performed at the former UST cluster location The proposed tests will be designed <br /> to obtain general aquifer characteristics such as hydraulic conductivity, transmissivity, drawdown <br /> and radius of influence at various pumping rates Data collected during the test will be used to <br /> evaluate groundwater remediation methods that may be applied at the site Procedures for <br /> performance of the extraction pilot tests are included in Section 4 2 <br /> 4.0. PROCEDURES <br /> All field activities will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist Procedures for the soil sampling, well Installation and equipment <br /> decontamination were described in the Monitoring Well Installation Work Plan - March 1998, <br /> prepared by AGE Procedures for performance of the pilot tests are outlined below <br /> a <br /> - 4-1 - IN-SITU AIR SPARGING PILOT TEST <br /> For performance of an IAS pilot test, a compressor-driven unit will be used to infect air into the <br /> subsurface using the new sparging well The induced pressure at monitoring points, sparging rate <br /> (discharge rate), vapor concentrations at monitoring points, depth to ground water in surrounding <br /> wells and dissolved oxygen will be measured throughout the IAS pilot test <br /> + Advanced GeoEnvironmental,Inc <br /> r � ' <br />