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• • 819 Striker Avenue,Suite 8 <br /> Sequoia <br /> Sacramento,CA 95834 <br /> Se UUIa (916)921-9600 <br /> Analytical FAXequoi labs.c92 1 00 <br /> www.sequoia]abs.com <br /> URS-Sac,Gateway Oaks Project: ARCO 760,Lodi,CA <br /> 2870 Gateway Oaks Dr.,Ste.300 Project Number: 760,Lodi,CA Reported: <br /> Sacramento CA,95833 Project Manager: Vernon Elarth 08/27/02 15:59 <br /> Total Purgeable Hydrocarbons and BTEX 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 2080205-EPA 5030B(P/T) <br /> LCS(2080205-BSI) Prepared&Analyzed:08/21/02 <br /> Benzene 0.0171 0.0050 mg/kg 0.0200 86 70-130 <br /> Toluene 0.0186 0.0050 0.0200 93 70-130 <br /> Ethylbenzene 0.0200 0.0050 0.0200 100 70-130 <br /> Xylenes(total) 0.0611 0.0050 0.0600 102 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 0.0169 0.0200 84 60-140 <br /> Matrix Spike(2080205-MSI) Source:S208245-01 Prepared&Analyzed:08/21/02 <br /> Benzene 0.0144 0.0050 mg/kg 0.0200 ND 72 60-140 <br /> Toluene 0.0148 0.0050 0.0200 ND 74 60-140 <br /> Ethylbenzene 0.0154 0.0050 0.0200 ND 77 60-140 <br /> Xylenes(total) 0.0518 0.0050 0.0600 ND 86 60-140 <br /> Surrogate:a,a,a-Trifluorotoluene 0.0152 0.0200 76 60-140 <br /> Matrix Spike Dup(2080205-MSD1) Source:S208245-01 Prepared&Analyzed:08/21/02 <br /> Benzene 0.0145 0.0050 mg/kg 0.0200 ND 72 60-140 0.7 25 <br /> Toluene 0.0151 0.0050 0.0200 ND 76 60-140 2 25 <br /> Ethylbenzene 0.0161 0.0050 0.0200 ND 81 60-140 4 25 <br /> Xylenes(total) 0.0544 0.0050 0.0600 ND 91 60-140 5 25 <br /> Surrogate:a,a,a-Trifluorotoluene 0.0158 0.0200 79 60-140 <br /> Batch 2080259-EPA 5030B(P/T) <br /> Blank(2080259-BLKI) Prepared&Analyzed:08/26/02 <br /> Purgeable Hydrocarbons ND 0.50 mg/kg <br /> Benzene ND 0.0050 " <br /> Toluene ND 0.0050 <br /> Ethylbenzene ND 0.0050 <br /> Xylenes(total) ND 0.0050 " <br /> Surrogate:a,a,a-Tris luorotoluene 0.0169 0.0200 84 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.This analytical report must be reproduced in its entirety. <br /> Page Page 10 of 14 <br />