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P <br /> rr <br /> F <br /> trough corresponds to the higher velocity areas derived <br /> from the Bouwer and Rice Slug test. <br /> 6. The gasoline range contaminated ground water plume has <br /> migrated past monitor well MW8 and is approaching MW7 . <br /> 7. Soil contamination is limited to the area directly <br /> beneath the tank excavation and nearby monitoring well <br /> NW10 and extends from the 25 foot depth to top of ground <br /> water. <br /> 8 . A vapor extraction source test performed on MW10 show a <br /> steady flow rate of 50 scfpm can be achieved from this <br /> well with an average concentration of 37 ,867 ppm <br /> gasoline vapor and 14% methane. <br /> 8 .0 RECOMMENDATIONS <br /> 1 . Proceed with the permitting "Authority to Construct" and <br /> "Permit to Operate" for the "Hartz" incinerator. <br /> 2. Finalize the permit to place treated ground water to the <br /> City of Stockton's sewer. <br /> E 3. Recover contaminated ground water from monitor wells MW1 <br /> and MW3 , using a gasoline rated air het pumps at a <br /> combined rate of 2000 gallons per day. <br /> 4. Place data logger transducers in monitor wells MW2, MW4 , <br /> ! MW7 and MW8 and record depth to water for one week and <br /> then obtain weekly depth to water measurements on all <br /> wells after the data loggers have been removed for one <br /> month and then monthly depth to water for one year to <br /> show the radius of influence the pumping is providing. <br /> The data obtained should be calculated upon receipt to <br /> ti justify the pump rate at monitor well MW3. <br /> f <br /> 3 <br /> 5. Pretreat the recovered ground water by removing <br /> suspended solids in a solids trap that is vented to the <br /> +- incinerator and is heated airstripped using a portion of <br /> the air supplied to the "convault" stripper. <br /> P <br /> 6. Treat the recovered ground water by heated air <br /> stripping. <br /> 7. Sample the influent prior to the stripper and the <br /> effluent after the stripper to determine percent <br /> destruction and flow rates that will be needed for <br /> 13 <br />