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Sequoia an Carlos <br /> A Road <br /> �"Y"^' San Cazios CA 94070 <br /> i1W Analytical o600 <br /> FAX(650)232-9612 <br /> www sequoiialabala6s com <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court, Suite 3 Prosect Number Former Unocal#15098,Stockton Reported <br /> Dublin CA,94568 _ Project Manager Deanna Harding 07/01102 07 46 ' <br /> Volatile Organic 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 /> MW-7(L206021-08)Water Sampled 06/10/02 15 31Received06/11/02 18 05 - <br /> 1,2-Dibromoethane ND 10 ug/I , 1 2060021 06/13/02 06/13/02 EPA 8260E <br /> 1,2-Dichloroethane ND 10 <br /> Di-isopropyl ether ND 10 <br /> Ethyl tert-butyl ether ND 10 n " 1. " " <br /> Methyl tert-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 10 <br /> Tert-butyl alcohol ND 20 " <br /> Surrogate 1 2-Dichloroethane-d4 103% 70-130 " <br /> Surrogate Toluene-d8 101 % 70-130 <br /> MW-8D(L206021-09)Water Sampled 06/10/021725 Received 06/11/02 18 05 <br /> 1,2-Dibromoethane ND 10 ugA 1 2060021 06/13/02 06/13/02 EPA 8260E <br /> 1,2-Dichloroethane ND 10 <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tart-butyl ether ND 10 <br /> Methyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether ND 10 " <br /> Ten-butyl alcohol ND 20 " <br /> Surrogate 1,2-Dichloroethane-d4 956% 70-130 <br /> Surrogate Toluene-d8 950% 70-130 " <br /> MW-9-(L206021:10)Water Sampled-06110/02 09-56-Received-06111102 18-05 <br /> 1,2-Dibromoethane _ ND 10 ug/l 1 2060021 06/13/02 06/13/02 EPA 8260E <br /> 1,2-Dichloroethane ND 1 0 - <br /> Di-isopropyl ether -- _ ND- T _1 0 <br /> Ethyl tent-butyl ether ND 1 0 11 " <br /> Methyl tert-butyl ether ND 1 0 <br /> Tert-amyl methyl ether ND 1 0 " <br /> Tert-butyl alcohol <br /> Surrogate 1,2-Dichloroethane-d4 109% 70-130 <br /> Surrogate Toluene-d8 - - - - 102% 70-130 " - - " - - - - - <br /> Sequoia 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 66 of 103 <br />