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819 Sinker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921 9600 <br /> FAX irAW Analytical wwseq 6) labsco0 <br /> www sequoialabs oom <br /> Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5211346 <br /> 6 Sierra Court,Ste ] Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/04/02 14 47 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-9 (S211346-10)Water Sampled 11/09/0214 15 Received 11/12/02 09 45 <br /> Purgeable Hydrocarbons ND 50 ug/1 1 2110288 11/21/02 11/21/02 DHS LUFT <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a,a-Trifluoiotoluene 119% 60-140 " <br /> MW-10(S211346-11)Water Sampled 11/09/02 17 20 Received 11/12/02 09 45 <br /> Purgeable Hydrocarbons 70000 5000 ug/l 100 2110317 11/21/02 11/21/02 DHS LUFr <br /> Benzene 5100 50 " <br /> Toluene 19000 50 " <br /> Ethylbenzene 2000 50 <br /> Xylenes(total) 14000 50 " <br /> Methyl tert-butyl ether ND 250 " <br /> Sure a,a,a-Trifluorololuene 99% 60-140 " <br /> MW-11'(S21 1 346-1 2)Water Sampled 11/09/02 16 20 Received 11/12/02 09 45 <br /> Purgeable Hydrocarbons 17000 2500 ug/l 50 2110317 11/21/02 11/21/02 DHS LUFT <br /> Benzene 440 25 " <br /> Toluene 50 25 " <br /> Ethylbenzene 1000 25 " <br /> Xylenes(total) 5300 25 " <br /> Methyl Cert-butyl ether ND 120 " <br /> Suit ogate'a,a,a-Ti ifluoi otoluene 79% 60-140 " <br /> is Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 22 <br />