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404 N WTet Lane <br /> 1—) Sequoia Walnut Creek,CA 94598 <br /> &M-0- i (925)988-9600 <br /> �I al iCa��- _ _ -� T�T _ _ ,- T__ _ - FAX(925) labs88 ca3 <br /> www se olalabs can- <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd,Ste #100 Project Number Arco 44932,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 /> DMW-2,40'(W206289-25)Soil Sampled 11-Jun-02 09 35 Received 14-Jun-02 08 55 <br /> tent-Butyl alcohol ND 25 mg/kg 100 2F25021 21-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-Diehloroethane ND 010 " <br /> 1,2-Dibromoethane ND 020 " <br /> Surrogate Dibromofluoromethane 106% 50-150 " <br /> Surrogate 12-Dichloroethane-d4 101% 50-150 " <br /> DMW-2,50 5'(W206289-26)Soil Sampled 11-Jun-020950 Received 14-Jun-020855 — <br /> tert-Butyl alcohol ND 25 mg/kg 100 2F25021 21-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 /> rt-Amyl methyl ether ND 010 " <br /> ,2-Dichloroedme ND 0 t " <br /> 1,2-Dibromoedme ND 020 " <br /> Surrogate Dibromofluoromethane 107% 50-150 " <br /> Surrogate 12-Dichloroethane-d4 112% 50-150 " <br /> EW-2,10'(W206289-27)Sod Sampled 13-Jun-02 09 00 Received 14-Jun-02 08 55 <br /> tert-Butyl alcohol ND 25 mg/kg 100 21725021 21-Jun-02 27-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-Dichloroethane ND 010 " <br /> 1,2-Dibromoethane ND 020 " <br /> .Surrogate Dibromofluoromethane 116% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 126% 50-150 " <br /> quota Analytical-Walnut Creek The results in this report apply to the samples analyzed In accordance with the chain of <br /> custody document Thu analytical report must be reproduced in its entirety <br /> Page 28 of 38 <br />