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404 N Wiget Lane <br /> _ _ Sequoia Walnut Creek CA 94598 <br /> (925)988-%W <br /> 14WAnalytical FAX eau alabsc988-%73 <br /> www sequotalabs con <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite 7 Project Number UnocaVCircle K#1205 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 15-Nov-00 07 38 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> – — ---Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Lirnit Units Dilution Batch Prepared Analyzed 'Method Notes <br /> MW-1 (WO10566-02)Water Sampled 20-Oct-0012 10 Received 23-Oct-0017 30 <br /> tert-Butyl alcohol ND 50 ug/1 1 OK01027 31-Oct-00 31-Oct-00 EPA 8260B <br /> Methyl tert-butyl ether 30 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 956% 50-150 " <br /> Surrogate 1,2-Dzchloroethaned4 131 % 50-150 " <br /> MW-2(WO10566-03)Water Sampled 20-Oct-0011 38 Received 23-Oct-00 17 30 <br /> tert-Butyl alcohol ND 50 ug/l. I OK01027 31-Oct-00 31-Oct-00 EPA 8260B <br /> Methyl tert-butyl ether 44 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 936% 50-150 <br /> Surrogate 1,2 Dichloroethaned4 127% 50-150 <br /> MW-3(WO10566-04)Water Sampled 20-Oct-00 11 10 Received 23-Oct-0017 30 <br /> tert-Butyl alcohol ND 50 ug/1 1 OK01027 31-Oct-00 31-Oct-00 EPA 8260B <br /> Methyl tent butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromedme 906% 50-150 " <br /> Surrogate 1,2Dichloroethaned4 125 % 50-150 " <br /> Sequoia Analytical-Walnut Creek The results zn tlas report apply to the samples analyzed in accordance with the chain of� <br /> custody document Thls analytical report must be reproduced in its entirety <br /> Page 2 of 11 <br />