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404 N Wiget Lane <br /> Walnut Creek,CA 94598 <br /> Sequoia (925)988-96W <br /> FAX(925)988-%7.3 <br /> Analytical www sequoialabs Corn <br /> 60 <br /> Gettler 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 13-Jun-01 09 07 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Lunn Units Dilution Batch Prepared Analyzed :Me;tho�dNots <br /> MW-1 (W105535-02)Water Sampled 23-May-01 16 44 Received 24-May-01 15 45 <br /> Ethanol ND 500 ug/1 1 1E30011 30-May-01 30-May-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether ND 20 <br /> Dt-isopropyl ether ND 20 " <br /> Ethyl Cert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 520% 50-150 <br /> Surrogate 1,2-Dichloroethane-l4 540% 50-150 " <br /> MW-2(W105535-03)Water Sampled 23-May-01 16 30 Received 24-May-01 15 45 <br /> Ethanol ND 500 uo 1 1E30011 30-May-01 30-May-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert butyl ether ND 20 <br /> opropyl ether ND 20 <br /> tert-butyl ether ND 20 " <br /> to -Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 106% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 900% 50-150 " <br /> MW-3(W105535-04)Water Sampled 23-May-01 15 42 Received 24-May-01 15 45 <br /> Ethanol ND 500 ugA 1 l E30011 06-Jun-01 06-Jun-0 L EPA 82608 <br /> tent-Butyl alcohol 58 20 " <br /> Methyl tent-butyl ether 59 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 940% 50-150 <br /> Surrogate 1 2-Diehloroethane-d4 102% 50-150 " <br /> oia Analytical-Walnut Creels 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 />