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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> a_ )-Analyfical <br /> (916)921-9600 <br /> FAX(916) 00 <br /> www sequoiallaabs om <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 Protect Manager Rusty Benkosky 07/09/02 16 26 <br /> Gasohne\BTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical-Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> GP-6-10'(5206360-02)Soil Sampled 06/21/02 10.00 ,Received,06/24/02 15.00 <br /> Ethanol ND 020 mg/kg 1 2060375 06/27/02 06/27/02 EPA 8260B <br /> Tert-butyl alcohol ND 0 050 <br /> Methyl tert-butyl ether ND 00050 <br /> Di-isopropyl ether ND 00050 " <br /> Ethyl tert-butyl ether ND 00050 <br /> Tert-amyl methyl ether ND 00050 <br /> 1,2-Dichloroethane ND 00050 <br /> 1,2-Dibrorrioethane(EDB) ND 00050 <br /> Benzene ND 00050 <br /> Ethylbenzene ND 00050 <br /> Toluene ND 00050 <br /> Xylenes(total) ND 00050 <br /> Gasoline(C6-Cl0) ND 1 0 <br /> Surrogate 12-DCA-d4 98% 60-140 <br /> Surrogate Toluene-d8 101 % 60-140 <br /> Surrogate 4-BFB 108% 60-140 " <br /> GP-7-10'(S206360-04)Soil Sampled 06/21/02 10.55 Recety_td,,06/24/02 15,00, <br /> Ethanol ND 020 mg/kg 1 2060375 06127102 06/28/02 EPA 8260B <br /> Tert-butyl alcohol ND 0 050 <br /> Methyl tert-butyl ether ND 00050 <br /> Di-isopropyl ether ND 00050 <br /> Ethyl tert-butyl ether ND 00050 <br /> Tert-amyl methyl ether ND 00050 " ^ <br /> 1,2-Dichloroethane ND 00050 <br /> 1,2-Dibromoethane(EDB) ND 00050 <br /> Benzene ND 00050 ^ ^ <br /> Ethylbenzene ND 00050 <br /> Toluene ND 00050 <br /> Xylenes(total) ND 00050 <br /> Gasoline(C6-C10) ND 10 <br /> Surrogate 12-DCA44 94% 60-140 " <br /> Surrogate Toluene-d8 100% 60-140 <br /> Surrozate 4-BFB 108% 60-140 FF " <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 be reproduced to its entirety <br /> Page Page 2 of 6 <br />