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San <br /> C tal Road <br /> Sequoia SanCarioniosnCA 94070 <br /> (650)232-9600 <br /> r� Analytical FAX(650)232-9612 <br /> www sequoiakabs corn <br /> er-Rvan/Geostrategies(I Project Unocal(4) L208033 <br /> Sierra Court Suite J Project Number Former Unocal 40187 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/29/02 07 10 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting- <br /> Analyte <br /> eportingAnalyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-25(1-208033-26)Water Sampled 08/13/02 10 18 Received 08/14/02 )9 55 <br /> Tert-butyl alcohol ND 20 ugn 1 2080017 08/16/02 08/17/02 EPA 8260B <br /> Methyl tert-butyl ether ND 10 It 11 11 " <br /> Di-isopropyl ether 2 5 10 <br /> Ethyl tert-butyl ether ND 10 <br /> Tert-amyl metbyl ether ND 1 0 " <br /> Surrogate 1,2-Dichloroethane-d4 111 % 70-130 " <br /> U-26(L208033-27)Water Sampled 08/14/02 1332 Received 08/14/02 19 55 <br /> Ten-butyl alcohol ND 20 ug/l 1 2080017 08/16/02 08/17/02 EPA 8260B <br /> Methyl tert-butyl ether 1 6 10 <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 10 <br /> Surrogate 12-Dichloroethane-d4 112% 70-130 " <br /> N-E-J-22 (L208033-28)Water Sampled 08/14/02 17 00 Received 08/14/02 19 55 <br /> utyl alcohol Soo 20 ugll 1 2080017 08/16/02 08/17/02 EPA 6260E <br /> Methyl tert-butyl ether ND 10 " <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 10 " <br /> Surrogate 1,2-Dichloroethane-d4 115% 70-130 " <br /> NP-1-65 1,208033-29 eater Sampled 08/14/02 17 30 Received 08/14/02 19 55 <br /> Tert-butyl alcohol 35 20 ug/l 1 2080017 08/16/02 08/17/02 EPA 8260B <br /> Methyl tert-butyl ether ND 1 0 It " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Tert-amyl methyl ether ND 10 " <br /> Surrogate 1,2-Dichloroethane-d4 117% 70-130 " <br /> 1a Analytical -San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <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 10 of 36 <br />