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t Lane <br /> Sequoia 4o4N WA 94598 <br /> Walnut meek,CA 94596 <br /> (925)988-9600 <br /> IW Analytical <br /> FAX(925)9$$9673 <br /> www segunialahs c <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd,Ste #100 Project Number Arco#4932,Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 24-Jul-02 12 03 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Walnut Creek <br /> Reporting <br /> cyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> DMW-2,82'(W206289-04)Soil Sampled 11-Jun-0211 10 Received 14-Tun-02 08 55 <br /> tert-Butyl alcohol ND 25 mg/kg 100 21725021 20-Jun-02 25-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 010 " <br /> 1,2-Dtchloroethane ND 010 " <br /> 1,2-Dibromoethane ND 020 " <br /> Surrogate Dibromofluoromethane 109% 50-150 " <br /> Surrogate 1,2 Dtchloroethane-d4 980% 50-150 " <br /> DMW-3,10'(W206289-05)Soil Sampled 12-Jun-02 08 40 Received 14-Tun-02 08 55 _ <br /> tert-Butyl alcohol ND 25 mg/kg 100 2F25021 20-Jun-02 26-Jun-02 EPA 8260B <br /> Methyl tert-butyl ether(MTBE) ND 020 " <br /> Di-isopropyl ether ND 010 " <br /> Ethyl tent-butyl ether ND 010 " <br /> tert-Amyl methyl ether ND 010 <br /> 1,2-Dichlorocthane ND 010 " <br /> 1,2-Dibromoethane ND 020 " <br /> Surrogate Dibromofluoromethane 113% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 964% 50-150 <br /> DMW-3,20'(W206289-06)Soil Sampled 12-.Tun-02 08 50 Received 14-.Tun-02 08 55 <br /> tert-Butyl alcohol ND 25 mg/kg 100 2F25021 20-Jun-02 26-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 010 " <br /> 1,2-Dichloroedme ND 010 " <br /> 1,2-Dibromoethane ND 020 " <br /> Surrogate Dibromofluoromethane 118% 50-150 " <br /> Surrogate 12 Dichloroethane-d4 988% 50450 " <br /> Sequoia Analytical-Walnut Creek 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 21 of 38 <br />