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" 404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> 4 (925)988-9600 <br /> Analytical F/X`925)98&9673 <br /> tDubher Ryan,Inc -Dublin Project Unocal <br /> n <br /> 7 Sierra Court Suite J Project Number Unocal#5886 Reported <br /> CA,94568 Project Manager Deanna L Harding 17-Mar-00 09 54 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Licit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1(W003053-02)Water Sampled 28-Feb-00 15 51 Received 01-Mar-0018 15 <br /> Ethanol ND 2500 uga 5 OC10011 10-Mu-00 10-Mar-00 EPA 8260A <br /> tert-Butyl alcohol ND 500 <br /> Methyl tert butyl ether 760 10 <br /> D1-isopropyl ether ND 10 ^ <br /> Ethyl tert-butyl ether ND 10 " <br /> tert Amyl methyl ether ND 10 <br /> Surrogate Dibromofluoromethane 102% 50-150 " <br /> Surrogate 1,1-Dichloroethane-d4 108% 50-150 " <br /> MW-2(W003053-03)Water Sampled 28-Feb-0016 31 Received 01-Mar-0018 15 <br /> Ethanol ND 250000 ug/1 500 0010011 10-Mar-00 10-Mar-00 EPA 8260A <br /> tent-Butyl alcohol ND 50060 <br /> Methyl tent-butyl ether 20000 1000 <br /> Di-isopropyl ether ND 1000 " <br /> Ethyl tert-butyl ether ND 1000 " <br /> -AV-Ainyl methyl ether ND 1000 <br /> JJJVgate Dibromofluoromethane 108% 50-150 A <br /> Surrogate 1,1-Dichloroethane-d4 106% 50-150 <br /> MW-3(W003053-04)Water Sampled 28-Feb-0017 11 Received 01-Mar-00 18 15 <br /> Ethanol ND 250000 ug/1 50o 0010011 10-Mar-00 11-Mas-00 EPA 8260A <br /> tert-Butyl alcohol ND 50000 <br /> Methyl tertbutyl ether 42000 1000 <br /> Di-isopropyl ether ND 1000 " <br /> Ethyl tertbutyl ether ND 1000 " <br /> tert Amyl methyl ether ND 1000 <br /> Surrogate Dibromofluoromethane 100% 50-150 " <br /> Surrogate 1,2 Dichloroethane-d4 106% 50-150 <br /> Sequoia Analytical-Walnut Creek The results in tks report apply to the samples analyzed in accordance with the churn of <br /> custody document.Th►s analytical report roust be reproduced m Ju entirety <br /> • <br /> Page 14 of 27 <br />