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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-4100 <br /> Ryan-Dublin Project Former Unocal 0187,Stockton,CA S211332 <br /> 6 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/27/02 17 49 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT-Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> lAnslyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110262-EPA 5O3OB(P/T) <br /> Laboratory Control Sample(2110262-BS2) Prepared&Analyzed 11/19/02 <br /> Benzene 8 87 050 ug/l ld 0 89 70-130 <br /> Toluene 8 77 050 100 88 70-130 <br /> Ethylbenzene 8 71 050 100 87 70-130 <br /> Xylenes(total) 264 0 50 300 88 70-130 <br /> Methyl tert-butyl ether 9 41 2 5 100 94 70-130 <br /> Surrogate a a a-Tiifluorotoluene 936 100 94 60-140 <br /> Laboratory Control Sample(2110262-BS3) Prepared&Analyzed 11/20/02 <br /> Benzene 8 93 050 118/1 100 89 70-130 <br /> Toluene 8 85 0 50 10 0 88 70-130 <br /> Ethylbenzene 8 83 0 50 100 88 70-130 <br /> s(total) 27 1 050 300 90 70-130 <br /> I tert-butyl ether 9 50 2 5 100 95 70-130 <br /> Surrogate a,a,a-Tr fluorotoluene 838 100 84 60-140 <br /> Matrix Spike 2110262-MSl Source 5211332-15 Prepared 11/18/02 Analyzed 11/19/02 <br /> Benzene 874 0 50 ug/l 100 ND 87 60-140 <br /> Toluene 8 80 0 50 " 100 ND 85 60-140 <br /> Ethylbenzene 8 69 0 50 100 ND 87 60-140 <br /> Xylenes(total) 268 0 50 300 ND 89 60-140 <br /> Methyl ten-butyl ether 996 2 5 100 ND 92 60-140 <br /> Surrogate a a a-Trifluorotoluene 840 100 84 60-140 <br /> Matrix Spike Du (2110262-MSD1) Source 5211332-15 Prepared 11/18/02 Analyzed 11/19/02 <br /> Benzene 8 92 050 ug/l 100 ND 89 60-140 2 25 <br /> Toluene 9 04 050 100 ND 88 60-140 3 25 <br /> Ethylbenzene 8 87 0 50 100 ND 89 60-140 2 25 <br /> Xylenes(total) 27 3 0 50 300 ND 91 60-140 2 25 <br /> Methyl tert-butyl ether 103 2 5 100 ND 95 60-140 3 25 <br /> Surrogate a a a-Trtfluarotoluene 836 100 84 60-140 <br /> is Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 31 of 41 <br />