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404 N.Wiget Lane <br /> 4FAX1 Sequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> qw Analytical <br /> 988-9673 <br /> ww.sequequoialabs.com <br /> rGettler Ryan,Inc.-Dublin Project: Chevron <br /> 6747 Sierra Court Suite J Project Number: Chevron#9-3232 Reported: <br /> Dublin CA,94568 Project Manager: Deanna L.Harding 03-Aug-01 07:33 <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-1 (W107328-02)Water Sampled: 18-Jul-01 12:50 Received: 19-Jul-01 10:00 <br /> Ethanol ND 500 ug/i 1 1G30017 31-Jai-01 01-Aug-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 2.0 " <br /> Di-isopropyl ether ND 2.0 " <br /> Ethyl tert-butyl ether ND 2.0 " <br /> tert-Amyl methyl ether ND 2.0 <br /> Surrogate:Dibromofluoromethane 87.4% 50-150 " <br /> Surrogate: 1,2-Dichloroethane-d4 94.0% 50-150 " <br /> MW-2(W107328-03)Water Sampled: 18-Jul-01 13:53 Received: 19-Jul-01 10:00 <br /> Ethanol ND 500 ugll 1 IG30017 31-Jul-01 01-Aug-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 " " <br /> Methyl tert-butyl ether ND 2.0 " <br /> Di-isopropyl ether ND 2.0 " <br /> r --1 tert-butyl ether ND 2.0 " <br /> %*.r.-imyl methyl ether ND 2.0 " <br /> Surrogate:Dibromofluoromethane 95.2% 50-150 " <br /> Surrogate:1,2-Dichloroethane-d4 100% 50-150 " <br /> MW-3(W107328-04)Water Sampled: 18-Jul-01 13:20 Received: 19-Jul-01 10:00 <br /> Ethanol ND 500 ug1l 1 1G30017 31-Jul-01 01-Aug-01 EPA 8260E <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether 7.9 2.0 <br /> Di-isopropyl ether ND 2.0 " <br /> Ethyl tert-butyl ether ND 2.0 <br /> tent-Amyl methyl ether ND 2.0 <br /> Surrogate. Dibromofluoromethane 862% 50-150 " <br /> Surrogate: 1,2-Dichloroethane-d4 93.4% 50-150 " <br /> Se�auoia Analytical-Walnut Creek 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 4 of 10 <br />