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819 Striker Ave Ste 8 <br /> Sequoia Sacramento, 95834 <br /> (916)92 92 1-9600 <br /> FAX(916)921-0100 <br /> iw Analytical www sequoialabscom <br /> Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5211346 <br /> Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/04/02 14 47 <br /> Total Purgeable Hydrocarbon, 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 2110317- EPA 5030B(Pn' <br /> Laboratory Control Sample(2110317-BS2) Prepared& Analyzed 11/21/02 ^ <br /> Benzene 999 050 118/1 100 100 70-130 <br /> Toluene 102 050 100 102 70-130 <br /> Ethylbenzene 102 050 100 102 70-130 , <br /> Xylenes(total) 299 050 300 100 70-130 <br /> Methyl tert-butyl ether 1 1 0 25 100 110 70-130 <br /> Surrogate a,a a-TriJluorotoluene 931 100 93 60-140 <br /> Laboratory Control Sample(2110317-BS3) Prepared& Analyzed 11/22/02 _ <br /> Benzene 10 1 050 ugA 100 101 70-130 <br /> Toluene 104 050 100 104 70-130 <br /> Ethylbenzene 102 050 100 102 70-130 <br /> (total) 304 050 300 101 70-130 <br /> tort-butyl ether 1 1 6 2 5 100 116 70-130 <br /> Surrogate a a a Tiifluorotoluene 110 100 110 60 140 <br /> _Matrix Spike(2110317-MSI) Source S211366-08 Prepared& Analyzed 11/20/02 <br /> Benzene 940 050 ugA 100 ND 94 60-140 <br /> Toluene 9 16 050 100 ND 92 60-140 <br /> Ethylbenzene 9 48 050 100 ND 95 60-140 <br /> Xylenes(total) 277 050 300 ND 92 60-140 <br /> Methyl tert-butyl ether 102 25 100 ND 102 60-140 <br /> Surrogate a a a-Tripuorotoluene 101 100 101 60 140 <br /> Matrix Spoke Dup(2110317-MSDI) Source S211366-08 Prepared&Analyzed 11/20/02 <br /> Benzene 101 050 ugA 100 ND 101 60-140 7 25 <br /> Toluene 979 050 100 ND 98 60-140 7 25 <br /> Ethylbenzene 101 050 100 ND 101 60-140 6 25 <br /> Xylenes(total) 300 0 50 300 ND 100 60-140 8 25 <br /> Methyl tert-butyl ether 11 1 25 100 ND 1 1 1 60-140 8 25 <br /> Surrogate a a a-TriJluororoluene 9 53 100 95 60-140 <br /> ra Anaiytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 18 of 22 <br />