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1551 Industrial Road <br /> Sequoia San Carrloslos CA 94070 <br /> Analytical - <br /> (650)232-9600 <br /> om <br /> FAX(650)232-9612 <br /> www saquoialabs com <br /> Gettler-Ryan/G eostrategies(1) Project Tosco(]} <br /> 6747 Sierra Court,Suite] Project Number Tosco(Unocal)SS46981,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/27/01 09 39 <br /> Total Purgeable Hydrocarbon (CO-C12)_by EPA_8015M and BTEX/MTBE by EPA 8021B ---- <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analvie Result Lunt Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-6(L]12085-04)Water Sampled 12/12/01 13 30 Received 12/13/01 19 40 - <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 1120080 12/20/01 12/20/01 EPA 8021B <br /> Benzene ND 050 ^ <br /> Toluene 1.2 050 <br /> Ethy]benzenc ND 050 <br /> Xylenes(total) 1 7 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a,a-Trifluorotoluene 100% 70-130 " <br /> MW-8(L112085-05)Water Sampled 12/12/01 14 10 Received 12/13/01 19 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I 1 1120079 12/20/01 12/20/01 EPA 8021B <br /> Benzene ND 050 " <br /> Toluene ND 050 n n " " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a a a-Trifluorotoluene 919% 70-130 <br /> MW-9(L]12085-06)Water Sampled 12/12/01 10 32 Received 12/13/01 19 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugA 1 1120079 12/20/01 12/20/01 EPA 8021B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl tent-butyl ether ND 5 0 <br /> Surrogate a,a,a-Triuormoluene 885% 70-130 " <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 22 <br />