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404 N Wqet Lane <br /> Sequoia Walnut Crock,CA 94598 <br /> 4D (925)988-960o <br /> iW Analytical �9255`9888s9613 <br /> Secor-Rancho Cordova Project Arco www <br /> 3017 Kilgore Rd,Ste #100 Project Number Arco#4932,Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Busty Benkosky 24-Jul-02 12 03 <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-10,30'(W206289=16)Soil Sampled 10-Jun-02 10 50 Received 14-Jun-02 08 55 <br /> tert-Butyl alcohol ND 25 mg/kg 100 2F25021 20-Jun-02 24-Jun-02 EPA 8260B <br /> Methyl tert-butyl ether(MTBE) ND 020 <br /> Di-isopropyl ether ND 010 " <br /> Ethyl tert-butyl ether ND 0 10 " <br /> tert-Amyl methyl ether ND 010 <br /> 1,2-Dichloroedme ND 010 " <br /> 1,2-Dibromoethane ND 020 <br /> Surrogate Dibromofluoromethane 992% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 944% 50-150 " <br /> MW-10,40'(W206289-17)Soil Sampled 10-Jun-0211 00 Received 14-Jun-02 08 55 <br /> tent-Butyl alcohol ND 25 mg/kg 100 2F25021 20-Jun-02 24-Jun-02 EPA 8260B <br /> Methyl tert-butyl ether(MTBE) ND 020 " " <br /> Di-Isopropyl ether ND 010 " <br /> Ethyl tert-butyl ether ND 010 <br /> tert-Amyl methyl ether ND 0 10 <br /> 1,2-Dtchloroethane ND 010 " <br /> 1,2-Dibromoethane ND 020 " <br /> Surrogate Dibromofluoromethane 976% 50-150 " <br /> Surrogate 12-Dtchloroethaned4 996% 50-150 " <br /> MW-11 20' 206289-18 Sod Sam led 10-Jun-02 15 30 Received 14-Jun-02 08 55 <br /> tert-Butyl alcohol ND 2 5 mg/kg 100 2F25021 20-Jun-02 24-Jun-02 EPA 8260B <br /> Methyl tert-butyl ether(MTBE) ND 020 1. " <br /> Di-isopropyl ether ND 0 10 " " " It " <br /> Ethyl tert-butyl ether ND 010 <br /> tert-Amyl methyl ether ND 010 <br /> 1,2-Dtchloroethane ND 010 " <br /> 1,2-Dibromoedme ND 020 " <br /> Surrogate Dibromofluoromethane 103% 50-150 " <br /> Surrogate I,2 Dichloroethaned4 106% 50-150 " <br /> Sequoia Analytical-Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> custodydocument This analytical report must be reproduced in its entirety <br /> Page 25 of 38 <br />