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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento95834 <br /> (gib))921 900 9600 <br /> Analytical FAX(916) 00 <br /> www sequoialabs labs 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 1128 <br /> Gasoline\BTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Linut Units Dilution Batch Prepared Analyzed Method Notes <br /> GP-1-10'(S206079-02)Sod Sampled 06/05/021010 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-C10) ND 10 " <br /> Surrogate 1 2-DCA-d4 96% 60-140 <br /> Surrogate Toluene-& 101 % 60-140 " <br /> Orrogate 4-BFB 116% 60-140 " <br /> GP-2-10'(5206079-04)Soil Sampled 06/05/02 11 20 Received 06/06/02 17 35 _ <br /> Ethanol ND 020 mg/kg 1 2060131 06/12/02 06/13/02 EPA 8260E <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 10 <br /> Surrogate 1,2-DCA-d4 140% 60-140 " <br /> Surrogate Toluene-d8 90% 60-140 " <br /> Surrogate 4-BFB 112% 60-140 " <br /> 46 quota Analytical-Sacramento The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its enttrety <br /> Page Page 2 of 12 <br />