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• • <br /> Table 1. Summary of Laboratory Analysis From Extraction System, <br /> ARCO Station 2133, Stockton <br /> TPH/gas and volatile organics, pg/i <br /> EPA Method 8015/8020/602 LUFr Method <br /> Date pH (field <br /> sampled measurement) Benzene Toluene Ethylbenzene Xylenes TPH as gas Cadmium Chromium Copper Lc„ad Nickel Zinc. <br /> 2/23/94 721 40 11 12 86 880 <0 002 <0 010 <0 010 <0 050 <0 025 0051 <br />