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j (one dedicated bailer for each well) <br /> cooler, and delivered to a state-certifiedcellaborato.ryefor <br /> anal <br /> lysis, followin;7 proper chain of custody procedures. <br /> f: Sanin �iCT &n pY � 1 P5 _ <br /> } s The results of the monitoring and laboratoryanalysis <br /> ground water for this sampling event are sumarizedinof the <br /> F Tables 1 and 2. <br /> Based on <br /> data and depth-to--Ovate.:• measurements, thous e general elevation survey <br /> water flow direction fo..; the rminedground <br /> northeaster) area was determined to be <br /> �4 y, as shown in Figure 2 <br /> measurements c . The depth-to-water <br /> inaiccted a noollected during this monitoring event, however, <br /> � a rthwestel:ly ground water flow direction. <br /> Ground water levels and wellhead elevations were again , <br /> $Ear measured on March 19, I990, confirming that the <br /> e flow direction is indeed towards the northwest, ground water <br /> E.R To determine the general shallow ground water flow direction <br /> in the area, Mr. Harlin Knoll (Environmental Health <br /> ' Specialists) , Of San Joaquin County Public Health Services, <br /> d,, Mr. Knoll indicated that there are <br /> construction and dewatering activities being performed <br /> immediately west of the site. These activities are <br /> the cause of: the recent change in probably <br /> from the prfidominart northeast to rhe Pr water flow direction <br /> ~' direction. . Accordingly, Present. northwest <br /> appear to he representativheogroundf the waterradient does not <br /> ahallow gzound water conditions naturally occurring <br /> ! ' The gradient <br /> and flow r;irection should be determined when around water <br /> flow conditions stabilize. <br /> No free product or sheen was noted in any of the ground water <br /> samples except from MonitoringWell Mw- <br /> 3 incha;s ex ept from <br /> 3, which had about <br /> MW-6 andhos Mf Proauct. hThe ground water samples from <br /> odor was nested exhibited samples slight sewage odor, while gasoline <br /> analyses of the from MW-4 and MW-5. Laboratory <br /> MW-1 and Mw-e forrthis samplingmeventes from indicatedMonitoring <br /> deteC a <br /> s <br /> concentrations of TPH as gasoline or BTEX. table <br /> gasoline was detected in samples from MW-2 through vMya-7pHins <br /> concentrations ranging from less than 50 to 5700 <br /> billion {ppb} . Copies of the official laboratorypreporarts tsrand <br /> chain of custody records are included in <br /> The results of this sampling event e <br /> Appendix A. <br /> dewatering project west of the site suggest <br /> that <br /> the ground watea <br /> r <br /> flow and contaminant transport beneath the site. Previous <br /> sampling of MW-2 showed no detectable.._concentrations of— -- <br />