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819 Striker Avenue Suite g <br /> Sacramento 9 9634 <br /> a— —N Sequoia (916) <br /> 9 <br /> FAX(916)921-0100 <br /> Analytical 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 06/14/02 11 28 <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-3-10'(S206079-06)Soil Sampled 06/05/021205 Received 06/06/021735 <br /> Ethanol ND 020 mg/kg 1 2060131 06/12/02 06/13/02 EPA 8260B <br /> I <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-C 10) ND 1 0 " <br /> Surrogate 1 2-DCA-d4 100% 60-140 " <br /> Surrogate Toluene-d8 104% 60-140 <br /> Surrogate 4-BFB 120% 60-140 <br /> GP-4-10' 5206079-08 Soil Sampled 06/05/02 13 15 Received 06/06/02 17 35 <br /> Ethanol ND 020 mg/kg 1 2060131 06/12/02 06/13/02 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-Ct0) ND 10 " <br /> Surrogate 12-DCA-d4 102% 60-140 " <br /> Surrogate Toluene-d8 101 % 60-140 " <br /> Surrogate 4-BFB 115% 60-140 " <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page Page 3 of 12 <br />