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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> Geuler-Ryan-Dublin Project Tosco 0187, Stockton,CA <br /> 6747 Sierra Court, Ste J Project Number C-Sparge Test Reported <br /> Dublin CA 94568 Project Manager Paul LeChentinant 05/15/01 11 55 <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-1-22(S105117-01)Water Sampled 05108/0109 15 Received 05/08/01 13 30 <br /> Purgeable Hydrocarbons 8290 2000 ug/I 40 1050176 05/10/01 05/10/01 DHS LUFT <br /> Benzene 173 200 " <br /> Toluene ND 200 " <br /> Ethylbenzene 261 200 <br /> Xylenes(total) 793 200 <br /> Methyl tert-butyl ether 178 100 " <br /> Surrogate a a a-Trifluorotoluene 103 % 60-140 " <br /> NP-1-65(S105117-02)Water Sampled 05/08/0109 00 Received 05/08/01 13 30 <br /> Purgeable Hydrocarbons 298 500 ug/I 1 1050176 05/10/01 05/10/01 DHS LUFT <br /> Benzene 857 0 500 " <br /> Toluene 42 4 0 500 " <br /> *y[benzene 548 0 500 <br /> Ienes(total) 590 0 500 <br /> Methyl tert-butyl ether 857 2 50 " <br /> Surrogate a a a-Trifluarotoluene 610% 60-140 " <br /> NP-1-111 (5105117-03)Water Sampled 05/08/0108 45 Received 05/08/01 13 30 <br /> Purgeable Hydrocarbons ND 500 ug11 1 1050176 05/10/01 05/10/01 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-Triuorotoluene 989% 60-140 " <br /> quota 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 2 of 5 <br />