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/ 14551McDow <br /> Sequoia Petaluma CA 94954 <br /> ell Blvd,North Ste <br /> 41a) (707) 4 <br /> 792-1865 <br /> qQWAnalytical <br /> FAX(707)792-0342 <br /> www sequoialabs com <br /> ler-Ryan/Geostrategies(1) Project Unocal(4) <br /> Sierra Court,Suite] Project Number Fortner Unocal#0187,Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 05/24/02 16 38 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analvie Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-7(1.205039-07)Water Sampled 05/07/02 13 20 Received 05/09/02 18 50 _ <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2050040 05/18/02 05/18/02 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 50 " <br /> Surrogate a,a a-Triuorotoluene 871 % 70-130 " <br /> U-8(1.205039-08)Water Sampled 05/07/02 14 25 Received 05/09/02 18 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I 1 2050040 05/18/02 05/18/02 EPA 8021B <br /> Benzene ND 0 50 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 50 ^ <br /> ate a a a-Trifluorotoluene 975% 70-130 " <br /> 205039-09)Water Sampled 05/07/02 13 55 Received 05/09/02 18 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 2050040 05/18/02 05/18/02 EPA 8021B <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 ^ <br /> Xylenes(total) ND 0 50 <br /> Methyl teri-butyl ether ND 5 0 <br /> Surrogate a a,o-Triuorololuene 105% 70-130 " <br /> la Analyttcal - San Carios 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 5 of 30 <br />