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819 Striker Avenue Suite 8 <br /> ,X�_ FAX Sequoia Sacramento,)9 99600 <br /> Analytical (916)92] 9600 <br /> (916)921-0I00 <br /> wo www sequoialabs com <br /> SECOR International-Rancho Cordova Project Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/09/02 16 26 <br /> Gasoline\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' 206360-02 Soil Sampled 06/21102 0 00 Received 06/24/02 1500 <br /> Ethanol ND 020 mg/kg 1 2060375 06/27/02 06/27/02 EPA 8260B <br /> Tert-butyl alcohol ND 0 050 " " 11 " " <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-DCA-d4 98% 60-140 " <br /> Surrogate Toluene-d8 101 % 60-140 <br /> Surrogate 4-BFB 108% 60-140 <br /> GP-7-10'15206360-041 Soil Sampled 06/21/02 10 55 Received 06/24/02 15.00 <br /> Ethanol ND 020 mg/kg l 2060375 06/27/02 06/28/02 EPA 8260B <br /> Tert-butyl alcohol ND 0 050 <br /> Methyl tent-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-C 10) ND 10 " <br /> Surrojzate 12-DCA-d4 94% 60-140 <br /> Surrogate Toluene-d8 100% 60-140 " <br /> Surroizate 4-BFB 108% 60-140 " <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> ojcustody document This analytical report must be reproduced in its entirety <br /> Page Page 2 of 6 <br />