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A representative water sample was collected from the well using a <br /> WEGE 1 inch diameter, sterilized bailer. The water samples <br /> collected were stored in labeled 1 liter "Boston Rounds" and 40 <br /> milliliter VOA vials. These water samples were placed into an <br /> insulated cooler with ice and submitted in the clients behalf <br /> "Chain of custody hand delivered" to McLaren Analytical <br /> Laboratories for chemical analyses. <br /> 3.0 RESMTS <br /> 3.1 PRODUCT AM RSCOVERX <br /> During the initial site assessment and during subsequent site <br /> visits floating product was observed in monitor wells HW-1 and MW- <br /> 3. Product thickness in MW-1 has ranged from 0.021 to 1.261 and <br /> from 0.64 to 1.661 in Y.W-3. The recovered gasoline is amber <br /> yellow and appears to be fresh (no apparent degradation) . <br /> Involved regulatory agencies suggested that product recovery <br /> commence before an aquifer pump test be performed. <br /> Temporary submersible pumFj were installed into monitor wells MW-1 <br /> and MW-3 for product recovery on October 10, 1969. All "plumbing" <br /> (pump lines, electrical lines, etc. ,) necessary for opera':ing the <br /> pumps are contained in underground schedule 40 PVC conduit. The <br /> product is pumped via this "plumbing" network to an above ground <br /> 1000 gallon ConVault tank. This Convault tank was placed within <br /> the secured compound and has been approved by the Stockton City <br /> Fire Dept. An automatic shut off switch has been installed to <br /> prevent the Convault from over spilling if the tank becomes nearly <br /> 1 full. Approximately 40 gallons of gasoline has been recovered to <br /> date and a site visit conduct by WEGE personnel on October 28, <br /> 1989 indicated that NW-1 and MW-3 have been depleted of gasoline <br /> product. <br /> 3.2 SITE COWDITIONS <br /> SOIL: <br /> 3 Soil samples were collected in monitor wells MW-4 thru MW-9 at 20, <br /> 30, 45, 50 and 65 feet below the surface. In order to construct a <br /> complete soil profile (lithology, concentrations, etc.,) , monitor <br /> well MW-10 soil sampling commenced at 20 feet below the surface <br /> and continued at 5 foot intervals to the base of the boring at 65 <br /> feet below the surface. <br /> Soil Contamination in monitor wells MW-4 thru HW-8 are below <br /> reporting limits for TPS, BTEX and EDB analyses. Minimal BTEX <br /> concentrations exists at 30 and 45 feet below the surface in <br /> monitor well HW-9. Significant BTEX concentrations exist in <br /> monitor well HW-10 at 40, 45, and 50 feet below the surface, <br /> however, these concentrations reduce rapidly at 55, and 60 feet <br /> below the surface. EDB concentrations are below reporting limits <br /> for all monitor wells. Complete chemical results for soil <br /> analyses are presented in TABLE 2 of this report. <br />