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15$1 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> (650)232-9600 <br /> Analytical FAX 232-9612 <br /> www sequoiequo�akabs corn <br /> Kler-Ryan/Geostrategies(l) Project Unocal(4) <br /> erra Court,Suite J Project Number Former Unocal#2859,Stockton Reported <br /> Dublin CA,94568 Protect Manager Deanna Harding 03/04/02 08 47 <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-15 L202097-19 Water Sampled 02/16/0211 20 Received 02/17/0211 00 <br /> Purgeable Hydrocarbons as Gasoline 370 100 ugA 2 2020070 02/21/02 02/22/02 EPA 8021B P-02 <br /> Benzene 16 10 " <br /> Toluene ND 10 <br /> Ethylbenzene 28 10 " <br /> Xylenes(total) 34 1 0 <br /> Methyl tert-butyl ether ND 10 " <br /> Surrogate a,a,a-Trtfluorotoluene 922 % 70-130 ^ " <br /> MW-16 L202097-20 Water Sampled 02/16/02 10 45 Received 02/17/02 11 00 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 2020071 02/21/02 02/21/02 EPA 80218 <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 050 <br /> Methyl tent-butyl ether ND 5 0 <br /> Wate a,a,a-Trtfluoratoluene 764% 70-130 " <br /> (L202097-21)Water Sampled 02/16/02 15 00 Received 02/17/02 11 00 .`- <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I 1 2020070 02/21/02 02/21/02 EPA 8021B <br /> Benzene ND 050 " <br /> Toluene 16 050 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) 19 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a,a-Trtfluorotoluene 904% 70-130 <br /> a 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 18 <br />