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The above stated theory has been substantiated with data obtained <br /> from other groundwater investigations being conducted in the vicin- <br /> of the Stockton Scavenger facility. In September of 1987, the <br /> subsurface flow at 1111 Navy Drive, one block east of the site, <br /> was determined to be flowing towards the northwest and located at <br /> 18 ft. below ground surface. July '1987 -measurements of ground- <br /> water levels at 3515 Navy Drive, west of the site,, were found to <br /> be 11 feet below ground surface with subsurface flow trending to <br /> the NW. This data was obtained from monitoring wells installed at <br /> these sites designed to address similar .concerns as those at the <br /> Stockton Scavenger site. <br /> The proposed locations of the two monitoring wells at the facility . <br /> are shown in Figure 2. Both wells will be within 10 feet of the <br /> excavation. This configuration will not only detect possible <br /> groundwater contamination but also serve to verify the direction <br /> of flow, on a two -dimensional basis, with the data given above. <br /> Thank you for your time and consideration in this matter. If your <br /> agency or the RWQCB 'has any questions about the enclosed informa- <br /> tion please feel free to contact me at any time. <br /> Sincerely, <br /> Michael Caprio <br /> Staff Hydrogeologist <br /> MAC <br /> cc: Jim Walsh <br /> MA <br /> JUN 2 tx <br /> ENVIROMENTAL HEALTH <br /> FERMIT/SERVICLS j <br />