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1551 Industrial Road <br /> 4D Sequoia San Carlos CA 94070 <br /> (650)232-9600 <br /> Analytical FAXequos labsc 12 <br /> www sequoialabs com <br /> r-Ryan/Geostrategies(I Project Unocal(4) <br /> Serra Court,Suite 7 Project Number Former Unocal 112859,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/30/02 14 17 <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 Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-14 L205055-19 Water Sampled 05/13/02 14 30 Received-05/14/02 17 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugA 1 2050057 05/23/02 05124102 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 933% 70-130 " <br /> MW-20 L205055-20 Water Sampled 05/13/021625 Received 05/14/02 17 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2050057 05/23/02 05/24/02 EPA 8021B <br /> Benzene 12 050 " " <br /> Toluene ND 050 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) 12 0 50 " <br /> Methyl tert-butyl ether ND 5 0 ^ " <br /> ate a a a-Trifluoratoluene 744% 70-130 " <br /> MW-21 (L205055-21)Water Sampled 05/14/02 09 15 Received 05/14/02 17 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I 1 2050059 05124/02 05/24/02 EPA 8021B <br /> Benzene <br /> ND 0 50 " <br /> Toluene 0 83 0 50 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) 15 0 50 <br /> Methyl tert-butyl ether ND 5 0 <br /> Surrogate a,a,a-Triuorotoluene 918% 70-130 " <br /> 1a 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 8 of 20 <br />