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4—D— (404N WtgetLane <br /> Sequoia walnut Creek,CA 94598 <br /> A <br /> 925)988-9600 <br /> �A-MytiCal _ T _ _ T� _ FAX(925)988-9673 <br /> www se otalahs can <br /> 5ecor-Rancho Cordova Project Arca <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 /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> DMW-2 60' 206289-01 Soil Sampled 11-Jun-0210 00 Received 14-.tun-02 08 55 <br /> tert-Butyl alcohol ND 2 5 mg/kg 100 21725021 20-Jun-02 25-Jun-02 EPA 8260E <br /> Methyl tert-butyl ether(MTBE) ND 020 " <br /> Di-isopropyl ether ND 010 " <br /> Ethyl tert-butyl ether ND oto " <br /> tert-Amyl methyl ether ND 010 " <br /> 1,2-Dichloroethane ND Oto " <br /> 1,2-Dibromoethane ND 020 " <br /> Surrogate Dtbromofluoromethane 104% 50-150 " <br /> Surrogate 1,2-Dtchloroethane-d4 100% 50-150 " <br /> DMW-2,70'(W206289-02)Soil Sampled 11-Jun-021020 Received 14-Jun-02 08 55 <br /> tert-Butyl alcohol ND 2 5 mg/kg 100 2F25021 20-Jun-02 25-Jun 02 EPA 8260B <br /> Methyl tert-butyl ether(MTBE) ND 020 " <br /> Di-isopropyl ether ND 010 " <br /> thyl tert-butyl ether ND 010 " <br /> -Amyl methyl ether ND 010 <br /> 1,2-Dtchloroethane ND 010 " <br /> 1,2-Dtbromoethane ND 020 " <br /> Surrogate Dtbromofluoromethane 104% 50-150 " <br /> Surrogate 1,2-Dtchloroethane-d4 984% 50-150 " <br /> DMW-2 75' 206289-03 Sail Sampled 11-Jun-02 10 40 Received 14-Jun-02 08 55 <br /> tert-Butyl alcohol ND 2 5 mg/kg 100 21125021 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 /> tent-Amyl methyl ether ND 010 " <br /> 1,2-Dtchloroethane ND 010 " <br /> 1,2-Dibromoethane ND 020 " <br /> Surrogate Dtbromofluoromethane 106% 50-150 " <br /> Surrogate 1,2-Dtchloroethane-d4 100% 50-150 " <br /> equoia Analytical-Walnut Creek The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Thls analytical report must be reproduced to its entirety <br /> Page 20 of 38 <br />