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1551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> (650)232-9600 <br /> Analytical FAX(650)232-96]2 <br /> scquoialabs corn <br /> er-Ryan/Geostrategies(1) Project Tosco(1) <br /> Sierra Court, Suite] Project Number Unocal SS#08671,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/06/01 15 09 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Lunit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-3(L111141-04)Water Sampled 11/20/011330 Received- 11/20/011950 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 1120003 12/03/01 12/04/01 CEPA 8021B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a,a-Trifluorotoluene 104% 70-130 " <br /> MW4(L111141-05)Water Sampled 11/20/01.14 40 Received- 11/20/01 19.50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I 1 1120003 12/03/01 12/04/01 EPA 8021E <br /> Benzene ND 050 <br /> Toluene 060 050 H " <br /> Ethylbenzene ND 050 " " " <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether 980 50 10 Ir „ M-04 <br /> ate a,a,a-Trtfluorotoluene 967% 70-130 <br /> Ask <br /> la Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 10 <br />