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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> *IWO Analytical www (916)921-0100 <br /> ww sequoialabs cam <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 P LeCheminant 02/13/01 11 52 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1020072 -EPA 5030B(PIT) <br /> Blank(1020072-BLKI) Prepared&Analyzed 02/08/01 <br /> Purgeable Hydrocarbons ND 500 ug/i <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-Trac luorotoluene 908 100 908 60-140 <br /> LCS(1020072-US1) Prepared&Analyzed 02/08/01 <br /> Benzene 800 0 500 ug/l l0 0 80 0 70-130 <br /> uene 830 0 500 100 83 0 70-130 <br /> ylbenzene 833 0 500 10 0 83 3 70-130 <br /> Xylenes(total) 25 2 0 500 300 84 0 70-130 <br /> Methyl tert-butyl ether 7 99 2 50 10 0 799 70-130 <br /> Surrogate a a a Trifhrorotoluene 880 100 88 0 60-140 <br /> Matrix Spike(1020072-MS1) Source S102111-05 Prepared&Analyzed 02/08/01 <br /> Benzene 840 0 500 ug/l 100 ND 840 60-140 <br /> Toluene 859 0 500 100 ND 859 60-140 <br /> Ethylbenzene S72 0 500 100 ND 872 60-140 <br /> Xylenes(total) 264 0 500 300 ND 88 0 60-140 <br /> Methyl tert-butyl ether 13 3 2 50 100 5 95 735 60-140 <br /> Surrogate a a a-Trifluorotoluene 8 81 100 881 60-140 <br /> Matrix Spike Dup(1020072-MSDI) Source S102111-05 Prepared&Analyzed 02/08/01 <br /> Benzene 822 0 500 ug/l 100 ND 82 2 60-140 2 17 25 <br /> Toluene 840 0 500 100 ND 84 0 60-140 224 25 <br /> Ethylbenzene 853 0 500 100 ND 85 3 60-140 220 25 <br /> Xylenes(total) 259 0 500 300 ND 963 60-140 l 91 25 <br /> Methyl tert-butyl ether 13 2 2 50 loo 595 725 60-140 0 755 25 <br /> Surrogate a a a-Trifluorotoluene 868 100 868 60-140 <br /> equoia 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 4 of 6 <br />