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Sequoia 819 Striker Avenue <br /> Sacramento CA 958 958344 <br /> (916)921-9600 <br /> FAX 00 <br /> VOWAnalytical www sequoialabs com <br /> Gettler-Ryan <br /> -Dublin Project Unocal 0187, Stockton, CA <br /> 6747 Sterna Court, Ste J Project Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager Paul LeCheminant 07/20/01 It 20 <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(S107029-04)Water Sampled 07/03/01 11 45 Received 07/03/01 16 20 <br /> Purgeable Hydrocarbons 100 100 ug/1 2 1070171 07/16/01 07/16/01 DHS LUFT <br /> Benzene 52 1 0 " <br /> Toluene ND 10 " <br /> Ethylbenzene ND 1 0 " <br /> Xylenes(total) ND 1 0 <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a a a-Trtfluorotoluene 120% 60-140 " <br /> NP-2-60(5107029-05)Water Sampled 07/03/01 11 40 Received 07/03/01 16 20 <br /> Purgeable Hydrocarbons ND 5000 ug/i 100 1070171 07/16/01 07/16/01 DHS LUFT <br /> Benzene 3700 50 " <br /> Toluene 260 50A&hylbcnzen " <br /> Wlenes(total) <br /> 150 50 I' <br /> lines(total) 250 50 <br /> ethyl tert-butyl ether ND 250 <br /> Surrogate a a a-Trifluorotoluene 128% 60-140 " <br /> NP-2-116(S107029-06)Water Sampled 07/03/01 11 30 Received 07/03/01 16 20 <br /> Purgeable Hydrocarbons 100 100 ug/I 2 1070171 07/16/01 07/16/01 DHS LUFT <br /> Benzene 38 1 0 " <br /> Toluene 18 10 " <br /> Ethylbenzene 11 10 " <br /> Xylenes(total) 2 3 1 0 " <br /> Methyl tent-butyl ether ND 5 0 " <br /> Surrogate a a a-Trifluorotoluene 115% 60-140 " <br /> equota 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 5 <br />