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404 N Wiget Lane <br /> ` Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX <br /> Analytical alabs c <br /> www sequoilabs 73 <br /> qucam <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite 3 Project Number Chevron#9-9840 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 07-Aug-01 15 35 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> [Analyte Result Limit Units Dilution Hatch Prepared Analyzed Method Notes <br /> MW-1 (Ni'107416-02)Water Sampled 23-Jul-01 13 51 Received 24-Jul-01 09 45 <br /> Ethanol ND 500 ug/I 1 11103014 03-Aug-0I 03-Aug-01 CPA 82608 <br /> ten-Butyl alcohol ND 20 " <br /> Methyl tert-but)I ether 180 2 0 " <br /> Dl-isopropyl ether ND 2 0 " <br /> Ethyl tert-butyl ether ND 2 0 " <br /> Cert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoroniethane 936% 50-150 " �' " <br /> Surrogate 1,2-Dichloroethane-d4 102 % 50-150 " <br /> NIW-2(W107416-03)Water Sampled 23-Jul-01 13 18 Received 24-Jul-01 09 45 <br /> Ethanol ND 500 ug/I 1 1H03014 03-Aug-01 03-Aug-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether 37 20 " <br /> Di-isopropyl ether ND 2 0 " <br /> ert-butyl ether ND 20 <br /> t .nyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 920% 50-150 <br /> Surrogate 1,2-Dichlorcethane-d4 990% 50-150 " " <br /> MW-3(W107416-04)Water Sampled 23-Jul-01 12 40 Received 24-Jul-01 09 45 <br /> Ethanol ND 500 ug/I 1 1H03014 03-Aug-01 03-Aug-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 1. " <br /> Methyl ten-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 Dibromofluoromethane 105 % 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 108% 50-150 " <br /> S is Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> cuslody document This analytical report must be reproduced in its entirety <br /> Page 4 of 10 <br />