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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX (916)921-0100 <br /> -Ryan-Dublin Project Former Unocal 0187,Stockton,CA S211332 <br /> 674 Sierra Court,Ste 7 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 /> lAnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110237-EPA 5030E(P/T) <br /> Laboratory Control Sample(2110237-BS2) Pre ared&Analyzed 11/18/02 <br /> Surrogate a,a,a-Trifluorotoluene 895 ug/1 100 90 60-140 <br /> Laboratory Control Sample 2110237-BS3 Prepared&Analyzed 11/19/02 <br /> Benzene 8 87 050 ugh 100 89 70-130 <br /> Toluene 8 77 050 100 88 70-130 <br /> Ethylbenzene 871 050 100 87 70-130 <br /> Xylenes(total) 264 050 300 88 70-130 <br /> Methyl tent-butyl ether 9 41 2 5 100 94 70-130 <br /> Surrogate a,a a-Trifluorotoltiene 936 100 94 60-140 <br /> x Spike(2110237-MSI) Source S211247-03 Prepared&Analyzed 11/15/02 <br /> e 933 0 50 ugh 100 ND 93 60-140 <br /> Toluene 927 050 100 ND 93 60-140 <br /> Ethylbenzene 9 22 0 50 10 0 ND 92 60-140 <br /> Xylenes(total) 28 2 0 50 300 ND 94 60-140 <br /> Methyl tert-butyl ether 101 2 5 100 ND 101 60-140 <br /> Surrogate a a a-Trtfluorotoluene 9 63 J00 96 60-140 <br /> Matrix Spike Du (2110237-MSD1) Source S211247-03 Prepared&Analyzed 11/15/02 <br /> Benzene 940 0 50 ugll 100 ND 94 60-140 07 25 <br /> Toluene 9 33 0 50 10 0 ND 93 60-140 0 6 25 <br /> Ethylbenzene 9 30 0 50 " 100 ND 93 60-140 09 25 <br /> Xylenes(total) 28 3 0 50 300 ND 94 60-140 0 4 25 <br /> Methyl tert-buiyl ether 102 2 5 100 ND 102 60-140 1 25 <br /> Surrogate a,a,a-Trifluorotoluene 9 63 100 96 60-140 <br /> Batch 2110262-EPA 5030B PIT <br /> Blank(2310262-BLK1) Prepared&Anal zed 11/18/02 <br /> Purgeable Hydrocarbons ND 50 u&4 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> oia Analytical-Sacramenw 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 /> 29 of 41 <br />