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404 N Wiget lane <br /> Sequoia Walnut Geek,CA 94598 <br /> (925)98$-9600 <br /> 4DFAX(925)988-9673 <br /> q,0 Analytical www sequoiaiabscom <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#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 80151%V8020M <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Lint Units Dilution Batch Prepared Analyzed Method Notes <br /> U-21 (W102669-22)Water Sampled 27-Feb-01 14 59 Received 28-Feb-01 16 50 - <br /> Gasohne 470 500 ug/1 1 1030229 09-Mar-OI 09-Mar-01 EPA <br /> 8015M/8020M <br /> Benzene 131 0 500 " <br /> Toluene 0 940 0 500 " QR-04 <br /> Ethylbenzene 0 871 0 500 " <br /> Xylenes(total) 224 0 500 " <br /> Methyl tert butyl ether ND 2 50 " <br /> Surrogate a,a,a-Tnfluorotoluene 930% 65-135 " <br /> Surrogate 4-Bromofluoroberrzene 105% 65-135 " <br /> U-22(W102669-23)Water Sampled 26-Feb-01 15 58 Received 28-Feb-01 16 50 <br /> Gasoline ND 500 ug/1 1 1030229 09-Mar-01 09-Mar-01 EPA <br /> 8015MI8020M <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene - _ __ __ __ __ _ ND -0500 <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate a,a,a-Trffluorotoluene 980% 65-135 <br /> Surrogate 4Bromofluorobenzene_ _— ___—_ __103_% - _ 65-135_ <br /> U-23(W102669-24)Water Sampled 26-Feb-01 16 20 Received 28-Feb-01 16 50 <br /> Gasoline ND 50 0 ug/I 1 1030229 09-Mar-Ol 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-Tnfluorotoluene 973% 65-135 <br /> Surrogate 4Bromofluorobenzene 102% 65-135 " <br /> Sequoia Analytical-Walnut Creek The results in tins report apply to the samples analysed in accordance with the chain <br /> custody document This analytical report must be mproduced in its entire <br /> Page 21 of 32 <br />