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Table 1. Summary of Laboratory Analysis From Extraction System, <br /> ARCO Station 2133, Stockton <br /> i <br /> i <br /> TPH/gas and volatile organics, pg/l <br /> EPA Method 8015180201602 Trace metals, mgll <br /> Date pH (field TPH <br /> sampled measurement) Benzene Toluene Ethylbenzene Xylenes as gas Cadmium Chromium Copper Arsenic Mercury Silver Lead Nickel Zinc <br /> 7112194 6 83 45 8 0 7 7 84 720 <0 010 <0 010 0 036 <0 10 <0 00020 <0010 <0 050 <0 025 0 093 <br /> Other Sample Analyses <br /> Date sampled Analyses Result, mgll <br /> 7112194 Petroleum Oil ND <br /> Total Suspended Solids <5 0 <br /> Cyanide <0 0 i 0 <br /> Biochemical Oxygen Demand <1 0 <br />