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Road <br /> a_ _� (650)232-9600Sequoia ]0 COTIOustr,al4070 San Carlos CA 94070Analytical FAX <br /> iWAW (650)232-9612 <br /> www sequoialabs com <br /> Gettler-Ryan/G eostrategies(1) Project Unocal(4) L208033 <br /> 6747 Sierra Court, Suite 3 Project Number Former Unocal#0187, Stockton Reported <br /> Dublin CA 94568 Protect Manager Deanna Harding 08/29/02 07 10 <br /> Total Purgeable Hydrocarbons (C6-00) by EPA 8015B modified, BTEXM by EPA 8021B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Lunn Units Dilution Batch Prepared Analyzed Method Notes <br /> _U-3 (L208033-04)Water Sampled 08/13/02 1655 Received_08114102 19 55 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l - - I 21122002 08/22/02 08/22/02 - 8015Bni/8021B <br /> Benzene ND 050 " <br /> Toluene ND 050 " ^ <br /> Ethylbenzene ND 050 ^ <br /> Xylenes(total) ND 050 <br /> Methyl Cert-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 122% 70-130 " <br /> U-4 (L208033-05)\hinter Sampled 08/12/02 13 00 Received 08/14/02 19 55 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/1 1 21-121001 08/21/02 08/21/02 8015Bm/8021B <br /> _ Benzene ND 050 <br /> Toluene 091 050 " <br /> Ethylbenzene' ND 050 ^ " <br /> Xylenes(total) 1.3 050 ^ " <br /> Methyl tert-butyl ether ND 25 <br /> r <br /> Surrogate a a a-Triuorotoluene 102% 70-130 " <br /> U-5(L208033-06)Water Sampled 08/12/02 13 35 Received 08/14/02 19 55 <br /> Gasoline Range Organics(C6-C10) ND 50 ugA 1 2H21001 08/21/02 08/21/02 8015Bm/8027B <br /> Benzene ND 050 <br /> Toluene 1.3 050 " ^ <br /> Ethylbenzene - - ND 050 <br /> Xylenes(total) 16 050 " ^ <br /> Methyl tert-butyl ether ND 25 " <br />-- Surrogate a,a,a-Trifluorotoluene - =T _- -,---- 100%-� T70-130= ---- <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 13 of 36 <br />