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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www.sequuialabs.com <br /> ilRS-Sac,Gateway Oaks Project: ARCO 5450,Stockton,CA <br /> 2870 Gateway Oaks Dr.,Ste.300 Project Number: 5450,Stockton,CA Reported: <br /> Sacramento CA,95833 Project Manager: Vernon Elarth 09/04/02 11:19 <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 /> 5450-MW4-11 S208391-03 Soil Sampled:08/28/02 15:00 Received:08/29/02 09:54 <br /> Ethanol ND 0.20 mglkg 1 2080300 08/30/02 08/30/02 EPA 8260B <br /> Tert-butyl alcohol ND 0.050 " <br /> Methyl tert-butyl ether ND 0.0050 <br /> Di-isopropyl ether ND 0.0050 " <br /> Ethyl tert-butyl ether ND 0.0050 " <br /> Tert-amyl methyl ether ND 0.0050 <br /> 1,2-Dichloroethane ND 0.0050 " <br /> 1,2-Dibromoethane(EDB) ND 0.0050 <br /> Benzene ND 0.0050 " <br /> Etbylbenzene ND 0.0050 " <br /> Toluene ND 0.0050 <br /> Xylenes(total) ND 0.0050 " <br /> Surrogate:1,2-DCA-d4 94% 60-140 " <br /> Surrogate: Toluene-d8 114% 60-140 <br /> Surrogate:4-BFB 108% 60-140 " <br /> 0 rum Com S208391-04 Sail Sam led:08/28/02 16:35 Received:08/29/02 09:54 <br /> Ethanol ND 0.20 mglkg 1 2080300 08/29/02 08/29/02 EPA 8260E <br /> Tert-butyl alcohol ND 0.050 " <br /> Methyl tent-butyl ether ND 0.0050 " <br /> Di-isopropyl ether ND 0.0050 <br /> Ethyl tert-butyl ether ND 0.0050 <br /> Tert-amyl methyl ether ND 0.0050 <br /> 1,2-Dichloroethane ND 0.0050 " <br /> 1,2-Dibromoethane(EDB) ND 0.0050 <br /> Benzene ND 0.0050 " <br /> Ethylbenzene ND 0.0050 " <br /> Toluene ND 0.0050 <br /> Xylenes(total) ND 0.0050 <br /> Surrogate:1,2-DCA-d4 97% 60-140 " <br /> Surrogate:Toluene-d8 122% 60-140 " <br /> Surrogate:4-BFB 116% 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 4 of <br />