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Sequoia 1SS11nOsCAlRoad <br /> 4070 ' <br /> San Carlos CA 94270 <br /> � Analytical <br /> (D— (650)232-9600 <br /> FAX(650)232-9612 <br /> www sequmalabs com _ <br /> Gen]er-Ryan/Geostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court,Suite j Project Number Former Unocal#2859,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-4(L205055-04)Water Sampled 05/13/02 13 10 Received 05/74/02 17 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugfl 1 2050056 05/23/02 05/23/02 EPA 8021B <br /> Benzene - ND 050 " -" ' " " - ^ <br /> Toluene ND 050 ^ <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 50 <br /> Surrogate a,a,a-Trifluorotoluene 874% 70-130 <br /> MW-5(L205055-05)Water Sampled 05/13/021235 Received 05/14/02 17 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 2050056 05/23/02 05/23/02 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 /> Surrogate a,a,a-Trifluorotoluene 102% 70-130 ^ . <br /> MW-6(L205055-06)Water Sampled 05/14/02 10 45 Received 05/14/02 17 50 _ <br /> Purgeable Hydrocarbons as Gasoline ND - 50 ug/l 1 2050056 05/23/02 05/24/02 EPA 8021B <br /> Benzene ND 050 " ^ <br /> Toluene ND 0 50 <br />=Ethylbenzene ND 0 50 - <br /> Xylenes(total) ND 050 ^ <br /> Methyl tert-butyl ether TND�5 0�1. ^ <br /> Surrogate a,a a-Triuorololuene 91 1 % 70-130 " <br /> Sequoia Analytical - San Carlos The results to this report apply to the samples analyzed In accordance with the chain 0 <br /> 0 <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 20 <br />