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819 Striker Avenue Sulte 8 <br /> Sequoia Sacramento CA <br /> 95834 <br /> (9!6)921-9600-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequotalabscom <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 06/15/01 I6 56 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> NP-2-20(5106064-04)Water Sampled 06/05/0100 00 Received 06/05/01 14 40 <br /> Purgeable Hydrocarbons 180 50 ug/l I 1F12003 06/12/01 06/13/01 EPA P-01 <br /> 8015M/8020 <br /> Benzene 7 1 050 " <br /> Toluene 14 050 " <br /> Ethylbenzene 12 050 " <br /> Xylenes(total) 14 050 " <br /> Methyl tert-butyl ether 3 1 2 5 CC-3 <br /> Surrogate a a a-Trifluorotoluene 930% 70-130 " <br /> NP-2-60(5106064-05)Water Sampled 06/05/0100 00 Received 06/05/01 14 40 <br /> Purgeable Hydrocarbons 4300 1000 ug/l 20 IF12003 06/12/01 06/12/01 EPA P-01 <br /> 8015M/8020 <br /> "lbenzeneynene 2200 10 CC-3 <br /> ene 160 10 <br /> 130 10 " <br /> Xylenes(total) 190 10 " <br /> Methyl tert-butyl ether ND 50 " <br /> Surrogate a a a-Trifluorotoluene 95 7% 70-1.30 <br /> NP-2-116(5106064-06)Water Sampled 06/05/01 10 10 Received 06/05/01 14 40 <br /> Purgeable Hydrocarbons 79 50 ug/l 1 1F12003 06/12/01 06/13/01 EPA P-01 <br /> 8015M/8020 <br /> Benzene 33 050 " <br /> Toluene 12 050 " <br /> Ethylbenzene 1 1 050 <br /> Xylenes(total) l 1 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 101 % 70-130 " <br /> The results in this report apply to the samples analyzed in accordance with the chain of <br /> Sequoia Analytical- Sacramento <br /> custody document This analytical report must he reproduced in its enarety <br /> page 3 of 6 <br />