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s <br /> M <br /> II <br /> - <br /> .. • <br /> F <br /> C <br /> P_A!E 1 HYDROGI OLOGtC Ihf VFSTta �Y <br /> 4491 iV Durham Fcrry Road,T <br /> Ddt&P, txcy,California <br /> No.40-91-732 <br /> Page 8 <br /> U <br /> TABLE 4 <br /> s� <br /> ' Chemical Analysis of Ground Water Samples <br /> Concentrations in Micrograms per literµg/I(ppb) <br /> Sample Date <br /> LQMd o 59—mpled Bung T21� In i t n Xylenra EDC4 <br /> MW-1 09/04/91 2.3 1.3 <0.5 <br /> 3.5 <0.5 <05 140 <br /> MW-2; 09/04/91 710 700 130 1,300 <0.5 <0,5 6,400 <br /> MW-3 09/04/91 <0.5 <0.5 <0.5 <0.5 <0.5 <O.S <Sq <br /> Domestic 09/04/91 <0.5 <0.5 <0.5 <br /> well <0.5 <0.5 <O.S <SO <br /> . Results of the chemiczl analyses of T!'H as gasoline for the soil sample cA"lected from a depth of 5 feet in <br /> monitoring well MW-2 indicated low concentrations of petroleum hydrocarbon constituents were present. <br /> _ <br /> V�s4 Chemical results of the soil sample collected from monitoring well MW_3 indicated petroleum constituents <br /> were below the laboratory's limit of detection. <br /> Results of the chemical analyses for ground water collected from monitoring well MW-3 and the domestic <br /> eater well indicated concentrations of petroleum Cot>stituents war,below the Iaboratrary's limit of detection. <br /> The ground water sample collected from monitoring wells MW-1 and MW-2 contained the concentrations <br /> of}petroleum consdWents. <br /> S.0 RE O—"_ENDATI QN <br /> Based on the findings , <br /> of this report,Delta recommends that the soil in the previously a:iisting tank locations t <br /> (1 and 2.Figure 2)be excavi: to a depth of I l feet and aerated on site. + <br /> j: <br /> 4r <br /> k� <br /> ` i <br /> PHIMI.BP <br /> aar <br /> i- . <br />