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404N WigetLme <br /> Sequoia Walnut Creek,CA 94598 <br /> (925)988 96DO <br /> { <br /> 4—D— <br /> Analytical FAX(925)988-9673 <br /> www se -otala6s can`T"�� <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd,Ste #100 Protect 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 /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> EW-2,43'(W206289-31)Soil Sampled 13-Jun-02 09 45 Received 14-Jun-02 08 55 <br /> tert-Butyl alcohol ND 25 mg/kg 100 2F25021 21-Jun-02 26-Jun-02 EPA 8260B <br /> Methyl tert-butyl ether(MTBE) 23 020 <br /> Di-isopropyl ether ND 010 " <br /> Ethyl tert-butyl ether ND 010 " <br /> tert-Amyl methyl ether ND 010 <br /> 1,2-Dichloroethane ND 010 " <br /> 1,2-Dibromoethane ND 020 ^ " <br /> Surrogate DibromoJluoromethane 120% 50-150 " <br /> Surrogate 12-Dichloroethane-d4 796% 50-150 <br /> quota Analytical-Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document.Thls analytical report must be reproduced in its entirety <br /> Page 30 of 38 <br />