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404 N Wiget Lane <br /> Sequoia walnut Creek.CA 94596 <br /> Analytical <br /> ver (925)988-9600 <br /> FAX(916)988-9673 <br /> www sz uotalabs can <br /> er Ryan,Inc -Dublin Project Unocal <br /> Sierra Court Suite 3 Project Number Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 29-Apr-02 11 18 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> TB-LB a204216-01)Water Sampled 11-Apr-020000 Received-12-Apr-02 15 00 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ugA 1 21316002 16-Apr-02 16-Apr-02 EPA <br /> 8015M/8021 <br /> Benzene ND 050 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether(MTBE) ND 25 Q-28 <br /> Surrogate a,a,a-Trifluorotoluene 115 % 70-130 " <br /> U_-26(W204216-02)Water Sampled 11-Apr-021245 Received 12-Apr-02 15 00 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/1 1 2D16002 16-Apr-02 16-Apr-02 EPA <br /> 8015M/8021 <br /> Benzene ND 050 " <br /> Toluene 22 0 50 QR-04 <br /> Ethylbenzene ND 050 " <br /> nes(total) 2 4 0 50 " QR-04 <br /> yl tert-butyl ether(MTBE) 14 25 Q_28a,QR-04 <br /> Surrogate a,a,a-Trifluorotoluene 104% 70-130 " <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 /> 2 of 6 <br />