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Sequoia 819 Straker Avenue 8 <br /> Sacramento CA 95834 <br /> (916)921-%W <br /> FAX Analytical alabsc <br /> www sequaiiabs 00 <br /> qucom <br /> Gettler-Ryan-Dublin Project Unocal 0187 Stockton,CA <br /> 6747 Sierra Court, Ste J Project Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager Paul LeChemmant 03/26/01 11 30 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limn Units Dilution Batch Prepared Analyzed Method Notes <br /> NP-2-20(5103226-04)Water Sampled 03/13/0109 45 Received 03/13/01 11 40 <br /> Purgeable Hydrocarbons 347 500 ug/l 1 1030294 03/20/01 03/20/01 DHS LUFT P-04 <br /> Benzene 145 0 500 " " <br /> Toluene 356 0 500 " " " " <br /> Ethylbenzene 282 0 500 11 " <br /> Xylenes(total) 4 10 0 500 " <br /> Methyl tert-butyl ether 13 4 2 50 " 1. " " <br /> Surrogate a a a-Trifluorotoluene 975% 60-140 1. " <br /> NP-2-60(5103226-05)Water Sampled 03/13/0109 35 Received 03/13/01 11 40 <br /> Purgeable Hydrocarbons 6830 5000 Ug/1 100 1030335 03/24/01 03/24/01 DHS LUFT P-02 <br /> Benzene 3040 500 " " " <br /> Toluene 217 500 11 " " <br /> 0lbenzene 170 500 1. <br /> nes(total) 277 500 11 11 <br /> Methyl tert-butyl ether 4050 250 " 11 <br /> " " <br /> Surrogate a a a-Trifluorotoluene 88 5% 60-140 " " <br /> NP-2-116(S103226-06)Water Sampled 0311310109 25 Received 03/13/01 11 40 <br /> Purgeable Hydrocarbons 582 500 ug/l 1 1030311 03/22/01 03/22/01 DHS LUFT P-02 <br /> Benzene 221 0 500 " " " <br /> Toluene 0 816 0 500 " <br /> Ethylbenzene 0 781 0 500 " <br /> Xylenes(total) 0 800 0 500 " <br /> Methyl tert-butyl ether ND 2 50 " <br /> Surrogate a a,a-Trifluorotoluene 102% 60-140 " " <br /> Qquota 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 7 <br />