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Lane <br /> Sequoia Walnut Creek,CAe94598 <br /> (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> AtRyan,Inc -D u b h n Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco(Unocal)#6981 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 23-Nov-99 16 42 <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 Nates <br /> MW-7(W910568-07)Water Sampled 26-Oct-99 15 00 Received 27-Oct-99 13 50 <br /> Purgeable Hydrocarbons ND 50 ug/l L 9KO5002 05-Nov-99 05-Nov-99 EPA <br /> Benzene 38 050 " " '1 " " 8015M/8020 <br /> Toluene 084 050 It <br /> I. <br /> I. " " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 23 050 " <br /> Methyl tert-butyl ether 240 25 " <br /> Surrogate a a a-Tnfluorololuene 967% 70-130 " <br /> MW-8(W910568-08)Water Sampled 26-Oct-99 08 55 Received 27-Opt-99 13 50 <br /> Purgeable Hydrocarbons ND 50 ugll 1 9KO5002 05-Nov-99 05-Nov-99 EPA <br /> Benzene ND 050 " " " 8015M/8020 <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xvlenes(total) ND 050 " <br /> MWIMW tert-buthl ether 2 5 2 5 " <br /> Si(JIMTare a a a-Trifluorotoluene 967% 70-130 " <br /> MW-9(W910568-09)Water Sampled 25-Oct-99 13 00 Received 27-0ct-99 13 50 <br /> Purgeable HydraLarbonh ND 50 ug/1 1 9KO5001 05-Lvov-99 05 Nov-99 EPA <br /> Benzene ND 050 80151u118020 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylene,-,(total) ND 0 50 " <br /> Methyl tent-butvl ether ND 2 5 " <br /> Surrogate a a a-Tnfluorotoluene 867% 70-130 " <br /> Seea Analytical-Walnut Creek The re%uIts in liar report apply to the smnples analysed in mcordance with the chain of <br /> custody document This analytical report inust be reproducedin its entirety <br /> *,iae gey, Pro�ec a ger Page 4 of 19 <br />