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3.0 RESULTS <br /> 3.1 FLOATING PRODUCT RECOVERY <br /> During the initial site assessment and during subsequent site <br /> visits floating product was observed in monitor wells MW-1 and MW- <br /> 3. Product thickness in MW-1 has ranged from 0.02' to 1.26' and <br /> from 0.6' to 1.66' in MW-3. The gasoline product is amber <br /> i yellLW in color and appears to be fresh (no apparent degradation). <br /> Involved regulatory agencies suggested that product recovery <br /> comrcence before an aquifer pump test be performed. <br /> Temporary submersible pneumatic pumps were installed into monitor <br /> wells MW-1 and MW-3 for product recovery on October 10, 1989. All I <br /> "plumbing" (pump lines, electrical lines, etc.,) necessary for ; <br /> ?: # operating the pumps are contained in underground schedule 40 PVC <br /> I conduit. The product is pumped via this "plumbing" network to an <br /> above ground 1000 gallon ConVault tank. This ConVault tank was <br /> placed within the secured cowpound and has been approved by the <br /> Stockton City Fire Dept. An automatic shut off switch has been <br /> installed to prevent the ConVault tank from spilling over when it <br /> € becomes nearly full. Approximately 40 gallons of gasoline <br /> product have been recovered to date. <br /> A site visit conducted by WEGE personnel on January 12, 1990 i <br /> indicated that MW-1 and MW-3 have been depleted of gasoline <br /> f product. The product recovery system was removed in February <br /> of 1990. On May 25, 1990, VEGE personnel visually inspected the <br /> ConVault tank and obtained a sample of the contents for analysis <br /> S by a state certified lab. The lab results indicated that no i <br /> floating product remained in the tank. The ConVault is now being <br /> r 3 used for "purged" well water storage. <br /> a <br /> i 3.2 SITE CONDITIONS <br /> p WATER: <br /> The latest chemical results (sampled 5/24-25/90) indicate that <br /> the dissolved benzene in monitor wells MW-1, MW ?, HW-3, MW-4, <br /> MW-6, ..W-8, MW-9, and HW-10 substantially exceeds the action level <br /> of 1.0 ppb set by the DHS for drinking water. Monitor wells MW-5 <br /> and MW-7, however, contain lower benzene values of 0.4 ppb and 0.8 <br /> ppb which are below DHS action levels for benzene. EDB <br /> concentrations were below reporting limits for all wells sampled <br /> on 5/4/89 (MW-1, MW-2, MW-4, MW-5, MW-6, MW-7, MW-8, and MW-9) so <br /> this analysis was not carried on. Complete water results are <br /> presented in TABLE 1 of this report. <br /> I <br /> f <br /> 16 <br /> i <br /> IBM <br />