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i <br />! ! 1 t y <br /> 20 September 2001 <br /> AGE-NC Project No 96-0235 y <br /> Page 5 of 8 <br /> r <br /> { <br />' 26 AQUIFER PUMPING TESTS <br /> Two liz iced ground water extraction (pump) tests will be performed to determine the feasibility 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 perforniedat 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 a constant pumping rates <br /> F ! <br />' 2 7 REPORT PREPARATION <br /> s <br /> Procedures and findings of drilling and well installations will be summarized in a report prepared <br />' for the site, Results of feasibility studies will be detailed in a Corrective Action Plan (CAP) The <br /> CAP will provide an analysis of feasibility testing and include recommendations for soil and ground <br /> water remediation at the site The reports will be in a format acceptable to the PHS-EHD and will <br /> be reviewed and signed by a Registered Geologist <br /> 1 3.0. FIELD PROCEDURES <br /> w <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 Monitoring Well Installation Work Plan - March 1998, dated <br /> 31 March 1998 Procedures for performance of the extraction pilot tests are detailed in the <br /> AGE-prepared Feasibility Pilot Test,Work Plan, dated 31 January 2000 <br /> AGE will apply for'a discharge permit from the City of Stockton to dispose extracted purge water <br /> ' <br /> generated during the proposed aquifer pumping tests through the sewer system. If a discharge permit <br /> can not be attained in a timely mariner and/or discharge requirements met in an economically feasible <br /> ' way, then an above ground Baker-type storage tank will be utilized for the temporary on-site <br /> contatiirnent of purge water pending transportation to an appropriate disposal facility F <br /> `3 1 CPT ADVANCEMENT AND GROUND WATER SAMPLE COLLECTION <br /> CPT soil bonng's'will be advanced to depths of 100 feet bsg utilizing a 25-ton truck-mounted CPT <br /> rig equipped with 2-inch diameter hollow-stem rods The first'soil boring will utilize a hydraulic ram <br /> to advance a cone penetrometer to the desired depth Soil parameters such as cone bearing pressure, <br /> ' sleeve friction, fraction ration and pore water pressure will be measured as the cone penetrometer is <br /> • advanced Rmseate' generated during drilling activities will be containerized in properly labeled <br /> 1 E , <br /> 1 Advanced GeoEnvironmentai,Inc <br /> 1 , r <br />