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404 N Wlget Lane <br /> eek.CA 94598 <br /> Sequoia Walnut C`925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequo1atabs corn <br /> er Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite 3 Project Number Unocal 4 0187 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 14-Mar-01 10 19 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015MI8020M <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Lunt Units Dilution Batch Prepared Analyzed Method Nates <br /> TB-LB(W102669-01)Water Sampled 26-Feb-01 00 00 Received 28-Feb-01 16 50 <br /> Gasoline ND 500 ug/1 1 1030227 09-Mar-01 09-Mar-01 EPA <br /> 8015M/8020M <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 " " " <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tent-butyl ether ND 250 " <br /> Surrogate a,a,a-Trrfluarotoluene 990% 65-135 " <br /> Surrogate 4 Bromofluorobenzene 983% 65-135 " <br /> U-1 (W102669-02)Water Sampled 26-Feb-01 12 05 Received 28-Feb-01 16 50 <br /> Gasoline 1890 250 ug/l 5 1030227 09-Mer-01 09-Mar-01 EPA <br /> 8015M/8020M <br /> Benzene 25 6 250 " <br /> Toluene 4 26 250 QR-04 <br /> Elftnzene ND 250 <br /> X s(total) 113 250 " <br /> Methyl tert butyl ether ND 12:5 <br /> Surrogate a,a,a-Tnfluorotoluene 100% 65-135 " <br /> Surrogate 4Bromofluorobenzene 983% 65-135 " <br /> U-2 (W102669-03)Water Sampled 26-Feb-01 13 21 Received 28-Feb-01 16 50 <br /> Gasoline 323 50 0 ug(l 1 1030227 09-Mer-01 09-Mar-01 EPA <br /> 8015MI8020M <br /> Benzene 510 0 500 " <br /> Toluene 19 0 0 500 P. 1p " <br /> Ethylbenzene 411 0 500 " <br /> Xylenes(total) ISO 0 500 " <br /> Methy)tert-butyl ether ND 2 50 " <br /> Surrogate a,a,a-Tnfluorotoluene 101 % 65-135 " <br /> Surrogate 4-Bromofluorobenzene 987% 65-135 " <br /> S a Analytical-Walnut Creek The resulls in taus report apply to the samples analysed in accordance with the chain of <br /> custody documem TMs analyucal repon must be reproduced in my entirely <br /> Page 14 of 32 <br />