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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> i:D (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Project Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project 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 /> 206351-01)WagSr Sarngled. 6/ c 06/24102 15.00 <br /> Ethanol ND 40 ug/1 1 21730002 06/30/02 07/01/02 EPA 8260B <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 050 <br /> Do-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 dibromide 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 /> IWrrogate 12-Dichloroethane-d4 110% 60-140 <br /> R7(S206351-02)Water Sampled 06/21/02 11 05 Received 06/24/02 15 00 <br /> Ethanol ND 40 ug/I 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 050 <br /> Total Xylenes ND 050 " <br /> Gasoline Range Organics(C6-C10) ND 50 " <br /> Surrozate 12-Dichloroethane-d4 109% 60-140 " <br /> quota 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 be reproduced in its entirety <br /> Page Page 2 of 6 <br />