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• 404 N Wlset Lane <br /> Walnut Creek CA 94598 <br /> Sequoia (925)988-96W <br /> ,5)4 FAX(925)988-%73 <br /> Analytical www ' 5com <br /> #-60- <br /> Gettler Ryan,Inc -Dubin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-9840 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 13-Mar-01 16 55 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Batch Prepared Analyzed Method Notes <br /> Analyte Result Limit Units Dilution <br /> MW-1(W102610-02)Water Sampled 23-Feb-01 08 55 Received 26-Feb-01 16 05 <br /> Ethanol ND 500 ug4 1 1002013 02-Mar-01 05-Mar-01 EPA 8260B <br /> tent-Butyl alcohol ND 50 " <br /> Methyl tent-butyl ether 230 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether 11 20 " <br /> Surrogate Dibromofluoromethane 102% 50-150 " <br /> Surrogate 1,2-Diehloroethane-d4 946% 50-150 <br /> MW-2(W102610-03)Water Sampled 23-Feb-0109 36 Received 26-Feb-01 16 05 <br /> Ethanol ND 500 ugfl 1 1CO2013 02-Mar-01 05-Mar-01 EPA 8260B <br /> tern-Butyl alcohol ND 50 " <br /> Metbyl tertbutyl ether 14 20 " <br /> Di-isopropyl ether ND 20 " <br /> tent-butyl ether ND 20 <br /> hinny]methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 107% 50-150 <br /> Surrogate 1,2-Dichloroethane-d4 952% 50-150 <br /> MW-3(W 102610-04)Water Sampled 23-Feb-01 10 16 Received 26-Feb-01 16 05 <br /> Ethanol ND 500 ugll 1 1CO2013 02-Mar-01 05-Mar-01 EPA 8260B <br /> tett-Butyl alcohol ND 50 <br /> Methyl tart-butyl ether ND 20 „ <br /> Di-Lsopropyl ether ND 20 „ <br /> Ethyl tert-butyl ether ND 20 " ,n <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 111 % 50-150 " n <br /> Surrogate 1,2 Dichloroethane-l4 944% 50-150 " <br /> Q--noia Analytical-Walnut Creek The results on tins report apply to the samples analyzed in accordance with the churn of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 4 of 10 <br />