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N. <br /> t Lane <br /> ' <br /> Sequoia 404 <br /> Cr ek,CA 94598 <br /> Walnut Creek,CA 94598 <br /> Analytical FAX <br /> �D (925)988-96i"� J` (9116)988-967373 <br /> www.sequoialabs.com <br /> r-:%1ler Ryan,Inc.-Dublin Project:-Tosco <br /> a7 Sierra Court Suite J Project Number: Tosco# 11195 Reported: <br /> Dublin CA,94568 Project Manager: Doug Lee 14-Jun-02 09:37 <br /> GasolinelBTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-17-S7.5(W206020-05)Soil Sampled:28-May-02 00:00 Received: 29-Mal-02 16.05 <br /> Ethanol ND 0.20 mg/kg 1 2060079 07-Jun-02 07-dun-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 /> Ethylbenzene ND 0.0050 " <br /> Toluene ND 0.0050 " '+ <br /> Xylenes(total) - ND 0.0050 <br /> Gasoline(C6-C10) ND 1.0 " <br /> Surrogate: 1,2-DC.444 122% 60-140 " <br /> Surrogate: Toluene-d8 93% 60-140 " <br /> S ::-agate:4-BFB 110% 60-140 <br /> oia Analytical-Walnut Creek 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 4 of 7 <br />