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819 Stnker Avenue Suite 8 <br /> Sequoia Sacre95834 <br /> a' (916)9 <br /> FAX(916)921-0100 <br /> *IWO Analytical wwwsequotalan5 cOm <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 Paul LeCheminant 05/30/0I 16 33 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> NP-2-20(SI05327-04)Water Sampled 05/2210100 00 Received 05/22/01 15 55 <br /> Purgeable Hydrocarbons 294 500 ug/i 1 1050346 05/29/01 05/29/01 DHS LUFT zP-02 <br /> Benzene l 1 0 0 500 " <br /> Toluene 0 551 0 500 " <br /> Ethylbenzene 1 75 0 500 " <br /> Xylenes(total) 447 0 500 " <br /> Methyl tort-butyl ether 574 250 " <br /> Surrogate a a a-Trifltiorotoluene 91 7% 60-140 " <br /> NP-2-60(5105327-05)Water Sampled 05/22/0100 00 Received 05/22/01 15 55 <br /> Purgeable Hydrocarbons 9120 5000 ug/l 100 1050346 05/29/01 05/29/01 DHS LUFT zP-02 <br /> Benzene 3320 500 " <br /> Toluene 253 500 " <br /> 0y[benzene 175 500 <br /> enes(total) 327 500 <br /> Methyl tert-butyl ether ND 250 <br /> Surrogate a a a-Trifluorotoluene 832% 60-140 " <br /> NP-2-116(S105327-06)Water Sampled 05/2210100 00 Received 05/22/01 15 55 <br /> Purgeable Hydrocarbons 145 500 ug/l 1 1050346 05/29/01 05/29/01 DHS LUFT zP-02 <br /> Benzene 388 0 500 " <br /> Toluene 241 0 500 " <br /> Ethylbenzene 249 0 500 " <br /> Xylenes(total) 293 0 500 " <br /> Methyl tert-butyl ether ND 250 <br /> Surrogate a a a-Trifluorotoluene 944% 60-140 " <br /> —Sequoia Analytical- Sacramento 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 /> Page 3 of 6 <br />