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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-96W � <br /> FAX 00 <br /> VQFAnalytical www sequoialabs coin <br /> Gettler-Ryan-Dublin Project Unocal 0187, Stockton,CA <br /> 6747 Sierra Court Ste 1 Project Number C-Sparge Test Reported <br /> Dublin CA,94568 Protect Manager Paul LeCheminant 04/16/01 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(S104132-01)Water Sampled 04/10/01 10 15 Received 04/10/01 15 00 <br /> Purgeable Hydrocarbons 6230 2000 ug/I 40 1040153 04/11!01 04/11/01 DHS LUFT P-02 <br /> Benzene 914 200 " <br /> Toluene ND 20 0 " <br /> Ethylbenzene 288 200 " <br /> Xylenes(total) 579 200 " <br /> Methyl tent-butyl ether ND 100 " <br /> Surrogate a a a-Trrfluorotoluene 104% 60-140 " <br /> NP-1-65(5104132-02)Water Sampled 04/10/01 10 05 Received 04/10/01 15 00 <br /> Purgeable Hydrocarbons 396 250 ug/l 5 1040173 04/12/01 04/12/01 DHS LUFT P-02 <br /> Benzene 953 250 " <br /> Toluene 597 2 50 " <br /> ylbenzene 947 250 <br /> ffenes(total) 931 250 " <br /> Methyl tert-butyl ether ND 125 " <br /> Surrogate a a a-Trifluorotoluene 858% 60-140 " <br /> NP-1-1I1 (5104132-03)Water Sampled 04/10/0109 55 Received 04/10/01 15 00 <br /> Purgeable Hydrocarbons ND 50 0 ug/l 1 1040153 04/11/01 04/11/01 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-Trtfluorotoluene 100% 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 6 <br />