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(D (651551 Industnal Road <br /> Sequoia San Carlos CA 94070 <br /> �p Analytical <br /> 0)232-9600 <br /> FAX(650)232-9612 <br /> www sequoialobs com <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court.Suite] Project Number Tosco(Unocal)SS#16981 Stockton,CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 09/27/01 10 19 <br />-- - Total Purgeable Hydrocarbon (C6-C12) by EPA-8015M and BT-EX/MTBE by-EPA 8021B - <br /> Sequola Analytical - San Carlos <br /> Reporting <br /> Analyse Result Lunn Units Dilution Batch Prepared Analyzed Method Notes <br /> TB-LB(L109080-01)Water Sampled 09/12/0100 00 Received 0911.3/01 19 30 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll I 1090095 09/24/01 09/24/01 DHS LUFT <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND so " <br /> Surrogate a,a,a-Tris luorotoluene 971 % 70-130 " <br /> MWA (L]09080-02)Water Sampled 09/13/01 16 05 Received 09/13/01 19 30 <br /> Purgeable Hydrocarbons as Gasoline 310 50 uO 1 3090095 09/24/01 09/24/01 DHS LUFT P-03 <br /> Benzene 34 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a a a-Trac luorotoluene 966% 70-130 " <br /> MW-2(L109080-03 Water Sampled 09/13/01 17 00 Received 09/13/01 19 30 <br /> Purgenble Hydrocarbons as Gasoline 360 50 ug/l 1 1090095 09/24/01 09/24/01 DHS LUFT P-01 <br /> Benzene 25 050 " <br /> Toluene 1 6 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 84 050 " <br /> Methyl tent-butyl ether 51 5 0 " <br /> Surrogate a,a,a-Tree luorotoluene 112 % 70-130 " <br /> Sequoia Analytical -San Carlos The results in this report apply to the samples analysed in accordance with the chain <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 2 of 21 <br />