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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical _ www sequolalabs corn <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-9840 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06-Jun-01 08 21 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-I(W105418-02)Water Sampled 17-May-01 18 37 Received 18-May-01 19 20 <br /> Ethanol ND 500 ugll I 1E23005 23-May-01 23-May-01 EPA 8260$ <br /> tert-Butyl alcohol 57 20 <br /> Methyl tent-butyl ether 180 20 ^ <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether 76 20 <br /> Surrogate Dtbromofluoromethane 842% 50-150 <br /> Surrogate 1,2-Dichloroethane-d4 936% 50-150 11 " " <br /> MW-2(W105418-03)Water Sampled 17-May-01 18 03 Received 18-May-01 19 20 <br /> Ethanol ND 500 ug/I 1 1E23005 23-May-01 25-May-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 ^ <br /> Methyl tert-butyl ether 23 20,JW <br /> propyl ether ND 20 ^ „ <br /> qW tert-butyl ether ND 20 <br /> tett-Amyl methyl ether ND 20 <br /> Surrogate Dtbromofluoromethane 866% 50-150 <br /> Surrogate 1,2 Dtchloroethane-d4 944% 50-150 <br /> MW-3(W105418-04)Water Sampled 17-May-01 17 26 Received 18-May-01 19 20 <br /> Ethanol ND 500 ug/1 1 1E23005 23-May-01 23-May-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether ND 20 " ^ <br /> Dr-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Drbromofluoromethane 912% 50-150 <br /> Surrogate 1,2-Dtchloroethane-d4 994% 50-150 <br /> ora Analytical-Walnut Creek <br /> y The results to tins report apply to the samples analyzed in accordance with the chats of <br /> r i <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 4 of 12 <br />