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819 Stnker Avenuc Suite 8 <br /> 4" Sequoia Sacramento,CA 95834 <br /> � (916)921-9600 <br /> %�^ Analytical FAX(916)92 1-0 100 <br /> www sequoialabs com <br /> OSECOR International-Rancho Cordova Project Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 P%lect Manager Rusty Benkosky 07/02/02 16 44 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> GP-6(S206351-01)Water Sampled 06/21/02 10 15 Received 06/24/02 15 00 <br /> Ethanol ND 40 ug/1 1 2F30002 06/30/02 07/01/02 EPA 8260B <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 050 <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 <br /> 1,2-Dichloroethane ND 050 " <br /> Ethylene dibromtde ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Total Xylenes ND 0 50 " <br /> Gasoline Range Organics(C6-C 10) ND 50 " <br /> Surroeate 12-Dichloroethane-d4 110% 60-140 IF <br /> -0P-7(S206351-02)Water Sampled 06/21/02 11 05 Received 06/24/02 15 00 <br /> Ethanol ND 40 ug/1 1 2F30002 06/30/02 07/01/02 EPA 8260B <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 <br /> tert-Amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 0 50 " <br /> Ethylene dibromtde ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Total Xylenes ND 050 <br /> Gasoline Range Organics(C6-C10) ND 50 " <br /> Surro rate 12-Dichloroethane-d4 109% 60-140 11 FF IF " <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must he reproduced in its entirety <br /> Page Page 2 of 6 <br />