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04 N. <br /> Lane <br /> Sequoia Walnut Creek, fA 94598 <br /> (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> �ttler Ryan,Inc.-Dublin Project: Unocal <br /> L)-/47 Sierra Court Suite J Project Number: Unocal 411195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna L.Harding 09-Dec-99 08:34 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-12-(W911580-11)Water Sampled: 19-Nov-99 11:27 Received: 22-Nov-99 16:00 <br /> Cert-Butyl alcohol ND 100 ugli 1 9L01009 03-Dec-99 03-Dec-99 EPA 8260A <br /> Methyl tent-butyl ether 5.8 2.0 " <br /> Di-isopropyl ether ND 2.0 " <br /> Ethyl tert-buty]ether ND 2.0 " <br /> tert-Amyl methyl ether ND 2.0 " <br /> Surrogate:Dibrornofluoromethane 118% 50-150 " <br /> Surrogate:1,2-Dichloroefhane-d4 110% 50-150 " <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed i n accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> A an B.Kemp,tlaboratdiy Director Page 9 of 12 <br />