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e Ste 8 <br /> Sequoia 81am Striker Av958 <br /> Sacramento CA 95834 <br /> a vtlr a <br /> (9 16)921 9600 <br /> �. FAX(916)921 0100 <br /> ✓ www sequoialahs cam. <br /> Gettler-Ryan-Petaluma Pro)ect Tosco 11192,Stockton,CA 8212192 <br /> 1364 N McDowell Blvd Ste B2 Project Number NIA Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 12/20/02 14 03 <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 2120200 -EPA 5030B(MeOH) <br /> Blank(2120200-BLKI) Prepared&Analyzed 12/16/02 <br /> Purgeable Hydrocarbons ND 050 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 0 0050 " <br /> Ethylbenzene ND 0 0050 " <br /> Xylenes(total) ND 00050 " <br /> Methyl Cert-butyl ether ND 00050 " <br /> Surrogate a a a-Triuoratoluene 00184 00200 91 60-140 <br /> Laboratory Control Sample(2120200-BSI) Prepared 12/16/02 Analyzed 12/19/02 <br /> Benzene 00163 00050 mg/kg 00200 82 70-130 <br /> Toluene 00167 00050 00200 84 70-130 <br /> Ethylbenzene 00174 00050 00200 87 70-130 • <br /> Xylenes(total) 00508 0 0050 00600 85 70 130 <br /> Methyl tert-butyl ether 00167 00050 00200 84 70 130 <br /> Surrogate a a a-Trifluorotoluene 00161 00200 81 60-140 <br /> Sequoia 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 report must he reproduced in its entirety <br /> Page 6 of 10 <br />