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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical www <br /> 921-0100 <br /> sequequolalabs corn <br /> Gettler-Ryan-Dublin Project Unocal 01 87, Stockton CA <br /> 6747 Sterna Court Ste J Project Number C-Sparge Test <br /> Reported <br /> Dublin CA,94568 Project Manager Paul LeCheminant 03/26/01 it 30 <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(5103226-01)Water Sampled 03/13/0109 05 Received 03/13/01 11 40 <br /> Purgeable Hydrocarbons 3010 1000 ug/l 20 1030311 03/22/01 03/22/01 DHS LUFT P-02 <br /> Benzene 109 10 0 <br /> Toluene ND too <br /> Ethylbenzene 129 10 D " <br /> Xylenes(total) 284 10 0 <br /> Methyl tert-butyl ether 453 500 <br /> Surrogate a a a-Trifluorotoluene 997% 60-140 <br /> NP-1-65(S103226-02)Water Sampled 03/13/0108 55 Received 03/13/01 11 40 <br /> Purgeable Hvdrocarbons 606 500 ug/l 1 1030294 03/20/01 03/20/01 DHS LUFT P-02 <br /> Benzene 0 912 0 500 <br /> Toluene 4 73 0 5000 " <br /> ylbenzene 1 14 0 500 <br /> enes(total) 928 0 500 <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate a a a-Trifluorotoluene 812% 60-140 <br /> NP-1-111 (5103226-03)Water Sampled 03/13/0108 45 Received 03/13/01 11 40 <br /> Purgeable Hydrocarbons ND 500 ug/l 1 1030294 03/20/01 03/20/01 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-Trifluorotoluene 850% 60-140 <br /> equola 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 7 <br />