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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4 45)— <br /> (916)921-9600 <br /> Anal100 <br /> ytical FAX(916)gabs com <br /> FAX <br /> sequoialabs om <br /> Gettler-Ryan-Dublin Project Unocal 0187,Stockton,CA <br /> 6747 Sierra Court,Ste J Project Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager P LeCheminant 03/02/01 17 05 <br /> Total Purgeable Hydrocarbons (C6-02), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit [hits Dilution Batch Prepared Analyzed Method Notes <br /> NP-1-22(5102299-01)Water Sampled 02/21/01 14 10 Received 02/21/01 16 20 <br /> Purgeable Hydrocarbons 5900 5000 ug/l 100 1020263 02/23/01 02/23/01 DHS LUFT P-02 <br /> Benzene 177 Soo " <br /> Toluene ND 500 " <br /> Ethylbenzene 151 500 " <br /> Xylenes(total) 291 Soo " <br /> _Methyl tert-butyl ether ND 250 " <br /> Surrogate a a a-Trifluorotoluene 117% 60-140 " <br /> NP-1-65(5102299-02)Water Sampled 02/21/01 14 15 Received 02/21/01 16 20 <br /> Purgeable Hydrocarbons 1390 500 ug/i 10 1020283 02/26/01 02/26/01 DHS LUFT P-02 <br /> Benzene 53 4 500 " <br /> Toluene 264 5006 " <br /> ylbenzene 264 Soo <br /> enes(total) 175 500 " <br /> Methyl tert-butyl ether ND 25 0 <br /> Surrogate a a a-Trtfluorotoluene 114% 60-140 " <br /> NP-1-111 (5102299-03)Water Sampled 02/21/01 14 20 Received 02/21/01 16 20 <br /> Purgeable Hydrocarbons ND 500 ug/i 1 1020263 02/23/01 02/23/01 DHS LUFT <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate a a a-Trtfluorotoluene 115% 60-140'RW " <br /> Am <br /> quota Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chat',of <br /> custody document This analytical report must be reproduced to its entirety <br /> page 2 of 7 <br />