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Ddve <br /> (DFAX�� 885 Jarvis 9500 <br /> Sequoia Morgan HIII,CA 95037 <br /> (408)7769600(408)782-6308 <br /> 44W Analytical www.sequolalabs.com <br /> URS Corporation I1) Project: ARCO#434 MLJ0617 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#434 Reported: <br /> Sacramento CA,95833 Project Manager: Vent Elarth 11/19/02 05:43 <br /> Total Purgeable Hydrocarbons 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 2100343-EPA 50308(P/1') <br /> Blank(2100343-BLKI) Prepared&Analyzed: 10/23/02 <br /> Purgeable Hydrocarbons ND 0.50 mg/kg <br /> Surrogate:a,a,a-Triuorotoluene 0.0165 0.0100 82 60-140 <br /> Laboratory Control Sample(2100343-BSI) Prepared&Analyzed: 10/23/02 <br /> Purgeable Hydrocarbons 0.898 0.50 mg/kg 1.00 90 70-130 <br /> Surrogate:a,a,a-Trruorotoluene 0.0234 0.0200 117 60-140 <br /> Matrix Spike(2100343-MSI) _ Source:MLJ0617-03 Prepared&Analyzed: 10/23/02 <br /> Purgeable Hydrocarbons 0.942 0.50 mg/kg 1.00 ND 94 60-140 <br /> Surrogate:a,a,a-Trinuorotoluene 0.0222 0.0200 111 60-140 <br /> Matrix Spike Dup(2100343-MSD1) Source:MLJ0617-03 Prepared&Analyzed: 10/23_/02 <br /> Purgeable Hydrocarbons 0929 0.50 mg/kg 1.00 ND 93 60-140 1 25 <br /> Surrogate:.a,a,a-Triuorotoluene 0.0222 0.0200 111 60-140 <br /> Sequoia Analytical-Morgan Hill 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 /> 8of12 <br />