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404 N Wiget Lane <br /> Sequoia Walnut(}eek,CA 94598 <br /> (925)988-9600 <br /> Analytical FAX(916)988-%73 <br /> www se4uoialabs can <br /> ler Ryan,Inc -Dublin Project Unocal <br /> 7 Sierra Court Suite J Project Number Unocal#2859 Reported <br /> Dublm CA,94568 Project Manager Deanna L Harding 29-Apr-02 11 22 <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 Preparcd Analyzed Method Notes <br /> TB-LB 204218-01 Water Sampled 11-Apr-020000 Received 12-Apr-021500 <br /> Purgeable Hydrocarbons(C6-C 12) ND 50 ugA 1 2D16002 16-Apr-02 16-Apr-02 EPA <br /> 8015M/8021 <br /> Bcnzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether(MTBE) ND 2 5 Q-28 <br /> Surrogate a,a,a-Tri�Iuorotoluene 104% 70-1.30 " <br /> MW-20(W204218-02)Water Sampled 11-Apr-02 14 30 Received 12-Apr-02 15 00 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/1 I 2D16002 16-Apr-02 16-Apr-02 EPA <br /> 8015M/8021 <br /> Benzene ND 050 " <br /> Toluene 0 73 050 QR-04 <br /> Ethylbenzene 058 0 50 " <br /> nes(total) 3 7 0 50 " <br /> iyl tert-butyl ether(MTBE) 9 0 2 5 _ Q-28 <br /> Surrogate a,a,a-Trifluorotoluene 99% 70-130 " <br /> MW-21 (W204218-03)Water Sampled 11-Apr-02 15 20 Received 12-Apr-02 15 00 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/l 1 2D16002 16-Apr-02 16-Apr-02 EPA <br /> 8015M/8021 <br /> Benzene ND 050 " <br /> Toluene 0 91 0 50 QR-04 <br /> Ethylbenzene 0 55 0 50 QR-04 <br /> Xylenes(total) 2 1 050 QR-04 <br /> Methyl tent-butyl ether(MTBE) 35 2 5 Q-28a,QR-04 <br /> Surrogate a,a,a-Trifluorotoluene 102% 70-1.30 " <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 />