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u <br /> Sequoia Walnut Creek CAe94598 <br /> — 4 (925)988-9600 <br /> D— Analytical FAX(925)988-9673 <br /> Gettler Ryan,hie -Dublin 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 /> Reportmg <br /> Analyte Result Lurut Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-11 (W910568-10)Water Sampled 26-Oct-99 13 10 Received 27-Oct-99 13 50 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 9KO5002 05-Nov-99 05-Nov-99 EPA <br /> Benzene ND 050 H8015M/8020 <br /> Toluene ND 050 N " <br /> Ethylbenzene 056 050 " <br /> Xylenes (total) 099 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> Sarrrogate a a a-Tnfluoratoluene 933% 70-130 " <br /> MW-14(W910568-11)Water Sampled 25-Oct-99 14 05 Received 27-Oct-99 13 50 <br /> Purgeable Hvdrocarbons ND 50 ug/l 1 9KO5001 05-Nov-99 05-Nov-99 EPA <br /> Benzene ND 050 " 8015M/8020 <br /> Toluene ND 050 <br /> Ethvlbenzene ND 050 " <br /> Xvlenes(total) ND 050 " <br /> Methyl tort-butyl ether 180 2 5 _ <br /> 5unogale as a-Tnfluorololuene- 900% -10-130 <br /> MW-15(W910568-12)Water Sampled 25-OLt-99 13 40 Received 27-Oct-99 13 50 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 9K05001 05-Nov-99 05-Nov-99 EPA <br /> Benzene ND 050 8015M/8020 <br /> toluene ND 050 " <br /> Ethvlbenzene ND 050 " <br /> Xylenes(total) - - ND 050 " - <br /> Mtthyl Cert-butyl ether 77 25 " <br /> Sim agate a a a-D fluototoluerre 900% 70-130 " <br /> F <br /> Sequoia Allalvocal - Walnut Creek The results in thus report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its enure <br /> 4U 'YeAgteely�*roject <br /> ana Page 5 of 19 <br />