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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> AFAX 921-4100 <br /> Analytical <br /> www seclucquoialahs coni <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 03/14/01 15 29 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Diluuon Batch Prepared Analyzed Method Notes <br /> NP-2-20(S1o3110-04)Water Sampled 03/0710100 00 Received 03/07/01 11 20 <br /> Purgeable Hydrocarbons 329 500 ug/I l 1030041 03/09/01 03/09/Oi DHS LUFT P-03 <br /> Benzene 134 0 500 <br /> Toluene 269 0 500 " <br /> Ethylbenzene 305 0 500 " <br /> Xylenes(total) 823 0 500 " <br /> Methyl tert-butyl ether ND 250 " f <br /> Surrogate a a a-Triuorotoluene 983% 60-140 " <br /> NP-2-60(5103110-05)Water Sampled 03/07/01 10 00 Received 03/07/01 11 20 <br /> Purgeable Hydrocarbons 7210 5000 ugll 100 1030124 03/12/01 03/12/01 DHS LUFT P-02 <br /> Benzene 3620 50 0 " <br /> Toluene 263 50 0 " <br /> ylbenzene 238 500 " <br /> lenes(total) 357 500 " <br /> Methyl tert-butyl ether ND 250 _ <br /> Surrogate a a a-Trifluorotoluene 726% 60-140 " <br /> NP-2-116(S103110-06)Water Sampled 03/07/0109 50 Received 03/07/01 11 20 <br /> Purgeable Hydrocarbons ND 500 ug/l 1 1030124 03/12/01 03/12/01 DHS LUFT <br /> Benzene 220 0 500 " <br /> Toluene 0 806 0 500 " <br /> Ethylbenzene 0 630 0 500 " <br /> Xylenes(total) 0 679 0 500 " <br /> Methyl tert-butyl ether 3 12 2 50 <br /> Surrogate a a a-Trifluorotoluene 713 % 60-140 " <br /> equota Analytical- Sacramento The results in this report apply to the samples analyzed in accordance+vuh the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> page 3 of 6 <br />