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SSS Jarvis Drive <br /> Sequoia Mo gan 08)7A-9600 <br /> (4oa>77v-9600 <br /> Analytical FAX(408)782-6308 <br /> wWw.sequota s.wrt <br /> ORS Corporation f 11 Project: ARCO#434 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#434 Reported: <br /> Sacramento CA,95833 Project Manager: Vern Elarth 10/29/02 11:33 <br /> BTEX by DHS LUFr-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 2100343-EPA 5030B(P/1) <br /> Blank(2100343-BLKI) Prepared: 10/23/02 Analyzed: 10/24/02 <br /> �.. Benzene ND 0.0050 mg/kg <br /> Toluene NO 0.0050 " <br /> Ethylbenzene ND 0.0050 " <br /> ... Xylenes(total) ND 0.0050 " <br /> Surrogate:a,a,a-Tris luorotoluene 0.0110 0.0100 105 60-140 <br /> LCS(2100343-BSI) Prepared&Analyzed: 10/23/02 <br /> r Benzene 0.0157 0.0050 mg/kg 70.130 <br /> Toluene 0.0178 0.0050 70-130 <br /> Ethylbenzene 0.0185 0.0050 70-130 <br /> Xylenes(total) 0.0580 0.0050 70-130 <br /> Surrogate:a,a,a-TrPuorotoluene 0.0181 0.0100 91 60-140 <br /> Matrix Spike(2100343-MSI) Source:NILJ0617-03 Prepared&Analyzed: 10/23/02 <br /> Benzene 0.0174 0.0050 mg/kg ND 60.140 <br /> Toluene 0.0842 0.0050 ND 60-140 <br /> Ethylbenzene 0.0227 0.0050 ND 60-140 <br /> ` Xylenes(total) 0.130 0.0050 ND 60-140 <br /> Surrogate:a,a,a-Tris luorotoluene 0.0212 0.0100 111 60-140 <br /> Matrix Spike Dap(2100343-MSD1) Source:NIU0617-03 Prepared&Analyzed: 10/23/02 <br /> �. Benzene 0.0171 0.0050 mg/kg ND 60-140 2 25 <br /> Toluene 0.0834 0.0050 ND 60-140 1 25 <br /> Ethylbenzene 0.0225 0.0050 ND 60-140 0.9 25 <br /> r, Xylenes(total) 0.129 0.0050 NO 60-140 0.8 25 <br /> Surrogate:a,a,a-Triiluorotoluene 0.0111 0.0200 111 60-140 <br /> r <br /> r_ <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> 8 of 11 <br />