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404 N Wigct Lane <br /> a_ _� Sequoia Walnut Creek,CA 94598 <br /> Analytical FAX(925)988-9604 <br /> (9 16)988-9673 <br /> www se uoialabs cam <br /> tier Ryan,Inc -Dublin Project Unocal <br /> 47 Sierra Court Suite J Project Number Unocal#0187 Reported: <br /> Dublin CA,94568 Project Manager Deanna L Harding 29-Apr-02 11 18 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-26 204216-02 Water Sampled 11-Apr-021245 Received 12-Apr-02 15 00 <br /> Ethanol ND 500 uSA 1 2D16009 16-Apr-02 16-Apr-02 EPA 8260B <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tent-butyl ether(MTBE) 2 0 2 0 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 2 0 " <br /> tert-Amyl methyl ether ND 2 0 <br /> Surrogate Dibromofluoromethane 95% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 90% 50-150 <br /> • <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 /> 3 of 6 <br />