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I GeoStrategies_lnc,, ,:. <br /> UNOCAL� Corporation:W '�f Jul 21 - . . . <br /> y 1993 <br /> Page 2 <br /> Groundwater samples-Were collected ora°May 26, 1<993. Samples were <br /> j analyzed for Total Petroleum .Hydrocarbons .calculated as Gasoline <br /> (TPH-Gasoline),-accord'i,ng to. EPA Method 80;15 Imodified). for_Benzene, <br /> Toluene, Ethylbenzene, Xylenes (BTEX).according to EPA Method 8020, <br /> anti-for Total PetroleumHydrocarbons calcula#ed as Diesel (TPH=Diesel) ' <br /> according to EPAWethod 3510. Groundwater samples from-Wells U-5,- <br /> U=6, and U-9 were also analyzed for. semiv(ylatile organic compounds <br /> tSVOUs) according d EPA,Method 8270:. Groundwater' samples :were - <br /> analyzed by Anametrix In.c.; a :Califo-rnia.State-certified laboratory located <br /> in- .,San Jose,�- ,California. . The. laboratory .analytical ..report and <br /> Chain-of-Custody: form. are- included in 'Append-ix. B. These data are <br /> summarized: .and.included with the historical ch-eniical analytical data <br /> presented in-Table 2 : A chemical isoconceritration map for benzene is <br /> presented . on Plate 4..: ,. Groundwater: sampling: field _methods and <br /> procedures are included:in a previous;GSI report dated July 10, 1-992.: <br /> 784680-5 <br />