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1551 Industrial Road <br /> Sequoia sass cartonrlos CA 94070 <br /> An alytica 1 (650)232-9600 <br /> FAX(650)232 9612 <br /> www sequoialabs cam <br /> ler-RyanlGeostrategies(I) Project Tosco(1) <br /> 7 Sierra Court,Suite J Project Number Tosco(Unocal)SS#6981, Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/27/0109 39 <br /> Total Purgeable Hydrocarbon (C6-02) by EPA 8015M and BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> TB-LB(LI 12085-01)Water Sampled 12/12/01 00 00 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 tert-butyl ether ND 5 0 <br /> Surrogate a,a,o-Trifluorotoluene 937% 70-130 " <br /> MW-4(L112085-02)Water Sampled 12/12/01 1745 Received 12/13/01 19 40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 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 ter(-butyl ether ND 5 0 ^ ^ <br /> * ate a,a,a-Triuorotoluene 948% 70-130 " <br /> -5{1,112085-03)Water Sampled 12/12/01 1545 Received 12/13/01 19 40 _ <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l I 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 tert-butyl ether ND 5 0 ^ ^ <br /> Surrogate a,a a-Triuorotoluene 103% 70-130 " <br /> !a Analytical-San Carlos The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must he reproduced in its entirety <br /> Page 2 of 22 <br />