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1551 Industrial Road <br /> Sequoia San Curios CA 94070 <br /> (650)232-9600 <br /> a— N <br /> w Analytical FAX(650)232-9612 <br /> ' www sovoialabs cam <br /> r-Ryan/Geostratcp.ies(l) Project Unocal(4) L208029 <br /> Sierra Court, Suite 3 Project Number Former Unocal#12859, Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 08/28/02 11 23 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> NNW-20(L208029-20)Water Sampled 08/09/02 16 45 Received 08/11/02 11 30 <br /> 1 2-Dibromoethane ND l 0 ug1l 1 2080023 08/22/02 08122/02 EPA 82608 <br /> 1,2-Dichloroethane ND l0 " <br /> Di-isopropyl ether ND l 0 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tert-butyl ether ND 1 0 ' <br /> Teri-amyl methyl ether ND 1 0 " <br /> Teri-butyl alcohol ND 20 <br /> Surrogate 1,2-Dichloroethane-d4 954 % 70-130 " <br /> Surrogate Toluene-d8 926% 70-130 " <br /> MW-21 (L208029-21)Water Sampled 08/09/02 17 20 Received 08/11/02 11 30 _._ .,......,_. <br /> 1 2-Dibromoethane ND 1 0 uSA 1 2080023 08/22/02 08/22/02 EPA 8260B <br /> 12-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 1 0 <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Welrt-bulylether ND 1 0 <br /> yl methyl ether ND 1 0 <br /> Ten-butyl alcohol ND 20 " <br /> Surrogate 1 1-Dichloroethane-d4 930% 70-130 " <br /> Surrogate Toluene-d8 936% 70-130 " <br /> SJWa Analytical -San Carlos The results to this report apply to the samples analyzed to accordance wrth the chain of <br /> custody document Unless otherwise stated results are reported on a ivei weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 25 <br />