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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> Analyticalwww sequotalabs com <br /> Geltler Ryan Inc - Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco 4 1]192 Reported <br /> Dublin CA, 94568 Project Manager Doug Lee 24-Aug-01 09 09 <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-8-9(W108160-02)Soil Sampled 09-Aug-01 00 00 Received 09-Aug-01 17 50 <br /> Ethanol ND 25 mg/kg 100 1H16012 16-Aug-01 16-Aug-01 EPA 826013 <br /> tert-Butyl alcohol ND 2 5 <br /> Methyl tert-butyl ether(MTBE) ND 0 10 <br /> Di-isopropyl ether ND 0 10 " <br /> Ethyl tert-butyl ether ND 0 10 <br /> 1 2-Dichloroethane ND 010 <br /> tert-Amyl methyl ether ND 0 10 <br /> 12-Dibromoethane ND 010 <br /> Surrogate Dibromofluoromethane — 988% 50-150 <br /> Surrogate 12-Dichloroethane-d4 900% 50-150 <br /> MW-8-13 5(W108160-03)Soil Sampled 09-Aug-01 00 00 Received 09-Aug-01 17 50 <br /> Ethanol ND 25 mg/kg 100 1 H 16012 16-Aug-01 16-Aug-01 EPA 826013 <br /> tert-Butyl alcohol ND 2 5 <br /> Methyl tert-butyl ether(MTBE) ND 0 10 " <br /> Di-isopropyl ether ND 0 10 <br /> Ethyl tert-butyl ether ND 0 10 <br /> 12-Dichloroethane ND 010 " <br /> tert-Amyl methyl ether ND 0 10 <br /> 1,2-Dibromoethane ND 010 " <br /> Surrogate Drbroinofluoromethane 980 % 50-150 " <br /> Surrogate 12-Dichloroethane-d4 856% 50-150 <br /> MW-9-9 5(W108160-05)Soil Sampled 09-Aug-01 00 00 Received 09-Aug-01 17 50 <br /> --------------- <br /> Ethanol ND 25 mglkg t00 IH16012 16-Aug-01 16-Aug-01 EPA 8260E <br /> tert-Butyl alcohol ND 2 5 " <br /> Methyl tent-butyl ether(MTBE) ND 0 10 _ <br /> Di-isopropyl ether ND 010 " <br /> Ethyl tert-butyl ether ND 010 " <br /> 1,2-Dichloro ethane ND 010 " <br /> tert-Amyl methyl ether ND 0 10 " <br /> 12-Dibromoethane ND 010 " <br /> Surrogate Drbromofluorotnethane -99-6% 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 896% 50-150 " <br /> Am <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance ivrih the c <br /> custody doc¢mrew This analytical report must he reproduced in its entr ry <br /> Page 5 of 11 <br />