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404 N W1getLane <br /> Sequoia Walnut Geek CA 94598 <br /> (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> Wer Ryan,Inc -Dubhn Project. Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal SS#2859 Reported. <br /> Dublin CA,94568 Project Manager Deanna L Harding 08-Sep-99 18 13 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> TB-113(W908426-01)Water Sampled 19-Aug-99 00 00 Received 20-Aug-99 17 00 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 9I01011 31-Aug-99 31-Aug-99 DRS LUFT <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 0 <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a,a,a-Trrfluorotoluene 933% 70-130 <br /> MW4(W908426-02)Water Sampled 19-Aug-9911 41 Received 20-Avg-99 17 00 <br /> Purgeable Hydrocarbons ND 50 ug/1 l 9101011 31-Aug-99 31-Aug-99 DHS LUFT <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 » " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> gate a a,a-Trtfluorotoluerre 967% -0-130 <br /> MW-5(W908426-03)Water Sampled 19-Aug-99 10 18 Received 20-Aug-99 17 00 <br /> Pureeable HYdrocerbona ND 50 ugA 1 9101011 31-,dug-99 31-Aug-99 DHS LUFT <br /> BenzCne ND 050 " <br /> Toluene ND 050 ^ " <br /> Ethylbenzene ND 050 <br /> Xyleneb(total) ND 050 " » <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a a,a-TrrJIuorotoluene 933% -0-130 " <br /> Sequota Analytical-Walnut Crcelc The results in this report apply to the sarnples amaly.ed r n accordance with the chmn of <br /> custody document Tlas analytical report mast be reproducedin i tr emrery <br /> l <br /> I <br /> u eg ey, Froject Ma6ager Page 2 of 5 <br />