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Sequoia <br /> 819 Striker Ave Ste 8 <br /> Se uoia <br /> Sacramento,CAA 95834 <br /> -9600 <br /> 9 (916)921-9600 <br />. 6 <br /> 00 <br /> Iwo Analytical wwwsequosalabs com <br /> Ryan-Dubli4 Project Former Unocal 2859,Stockton,CA S211346 <br /> 6 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 2110288-EPA 5030B (P/T) <br /> Laboratory Control Sample(2110288-BS2) Prepared& Analyzed 11/20/02 <br /> Surrogate a a a-Tnfluoratoluene 883 ug/1 100 88 60-140 <br /> Laboratory Control Sample(2110288-BS3) Prepared& Analyzed 11/21/02 <br /> Benzene 999 050 ug/l 100 too 70-130 <br /> Toluene 102 050 too 102 70-130 <br /> Ethylbenzene 102 050 too 102 70-130 <br /> Xylenes(total) 299 050 300 too 70-130 <br /> Methyl ten-butyl ether 11 0 2 5 loo 110 70-130 <br /> Surrogate a a,a-Trifluorotoluene 931 100 93 60-140 <br /> M Spike(2110288-MSI) Source S211346-02 Prepared&Analyzed 11/21/02 <br /> BW 101 050 ug/1 ]Go ND 101 60-140 <br /> Toluene 105 050 100 ND 105 60-140 <br /> Ethylbenzene 9 82 050 too ND 98 60-140 <br /> Xyienes(total) 295 050 300 ND 98 60-140 <br /> Methyl teri-butyl ether 1 1 6 2 5 100 ND 116 60-140 <br /> Surrogate a a a-Tnfluororoluene 101 100 101 60-140 <br /> Matrix Spike Du (2110288-MSDI) Source S211346-02 Prepared&Analyzed 11/21/02 <br /> Benzene 109 0 50 ug/l too ND 109 60-140 8 25 <br /> Toluene 11 2 050 100 ND 112 60-140 6 25 <br /> Ethylbenzene 106 050 too ND 106 60-140 8 25 <br /> kylenes(total) 306 050 300 ND 102 60-140 4 25 <br /> Methyl Cert-butyl ether 1 1 9 2 5 too ND 119 60-140 3 25 <br /> Surrogate a a a-Trifluorotoluene 105 100 105 60-140 <br /> Batch 2110317- EPA 5030B(P/T) <br /> _Blank(2110317-BLKI) Prepared&Analyzed 11/20/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Soa Analytical - 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 i eport must be reproduced in its entirety <br /> Page 16 of 22 <br />