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404 N Wigei Lane <br /> 4D Sequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> 1W Analytical FAX(925)988-9673 <br /> www mquoialabs can <br /> ettler Ryan,Inc -Dublin Project Tosco W208192 <br /> 747 Sierra Court Suite J Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 18-Oct-02 12 52 <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-4 208192-04 Water Sampled 08-Aug-02 12 55 Received 09-Aug-02 16 15 <br /> Ethanol ND 500 ugA 1 2H 12008 16-Aug-02 16-Aug-02 EPA 82608 <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether(MTBE) 270 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 " <br /> Ethylene dibromide ND 20 ^ " <br /> Surrogate Dibromofluoromethane 110% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 104% 50-150 " <br /> i <br /> MW-5(W208192-05)Water Sampled 08-Aug-02 12 15 Received 09-Aug-0216 15 _ <br /> Ethanol ND 500 ugA 1 2H 12008 12-Aug-02 12-Aug-02 EPA 8260B <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether(MTBE) ND 20 " <br /> risopropyl ether ND 20 " <br /> W <br /> yl tert-butyl ether ND 20 " <br /> -Amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 <br /> Ethylene dibromide ND 20 <br /> Surrogate Dibromofluoromethane 992% 50-150 <br /> Surrogate 1,2-Dichloroethane-d4 994% 50-150 ^ <br /> MW-5 208192-06 Water Sampled 08-Aug-02 14 30 Received-09-Aug-02 16 15 <br /> Ethanol ND 500 ug/l 1 21412008 12-Aug-02 12-Aug-02 EPA 8260E <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether(MTBE) ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 <br /> Ethylene dibromide ND 20 " <br /> Surrogate Dibromofluoromethane 100% 50-150 <br /> Surrogate 1,2-Dichloroethane-d4 978% 50-150 " <br /> oia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> 4of17 <br />