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l Sequoia 404 N Wiget Lane <br /> Walnut Creek, CA 94598 <br /> „ (925) 988-9670 <br /> Analytical <br /> FAX(925)988-9673 <br /> OtTtlerRyan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal# 5886 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 16-Dec-99 09 01 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Walnut Creek <br /> Analyte Reporting <br /> Result Lirrut Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-9S(W912007-16)Water Sampled 29-Nov-99 13 52 Received 30-Nov-99 19 05 <br /> Purgeable Hydrocarbons ND 50 ug/1 I 9LO7002 07-Dec-99 07-Deo-99 EPA <br /> Benzene ND 050 11 11 „ „ 8015M/8020 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 „ <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a,a,a-Tnfluorotoluene 9G 7% 70-130 ” <br /> MW-9I(W912007-17)Water Sampled 29-Nov-99 14 15 Received 30-Nov-99 19 05 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 9L07002 07-Dec-99 07-Dec-99 EPA <br /> Benzene ND 050 " 11 „ „ 8015M/8020 <br /> Toluene ND 050 to R 1. „ „ <br /> Ethylbenzene ND 050 It <br /> to <br /> Xylenes(total) ND 0 50 to „ <br /> Methyl tert-butyl ether ND 2 5 ” 11 „ <br /> ogate a,a,a-Trtfluorotoluene 967% 70-130 <br /> MW-9D(W912007-18)Water Sampled 29-Nov-9914 42 Received 30-Nov-99 19 05 <br /> Purgeable Hydrocarbons ND 50 ug/1 t 9LO7002 07-Deo-99 07-Dec-99 EPA <br /> Benzene ND 0 50 ” „ 11 „ 8015M/8020 <br /> Toluene ND 0 50 to <br /> Ethylbenzene ND 0 50 „ <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 „ <br /> Surrogate a,a a-Tnfluorotoluene 100% 70-130 r » <br /> uola Analytical-Walnut Creek The results in tips report apply to the smnples analyzed in accordance with the chwn of <br /> custody document This analytical treport must he reproduced in its entirety <br /> r <br /> u anne eg ey, rolect anagen <br /> Page 7 of 27 <br />