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a <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 MWB and is approaching MW7. <br /> 7. Soil contamination is limited to the area directly <br /> beneath the tank excavation and nearby monitoring well <br /> MW10 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 5o 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 "Hirtz" incinerator. <br /> 2. Finalize the permit to place treated ground water to the <br /> City of Stockton's sewer. <br /> 3. Recover contaminated ground water from monitor wells MW1 <br /> and MW3, using a gasoline rated air jet 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 /> justify the pump rate at monitor well MW3. <br /> i <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 /> 6. Treat the reco-- -ed ground water by heated air <br /> stropping. <br /> 7. Sampie 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 />� f <br /> 13 <br /> E <br /> i <br />