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S e clu of 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> r (916)921-9600 <br /> Analytical w. egLtoal [-0100 <br /> Analytical wwwsequoialabs.corn <br /> oetta Environmental ConsuItants(Cameron Park) Project: ARCO 548,Stockton, CA <br /> 3330 Cameron Park Dr. Project Number: N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 02/16/01 13:50 <br /> Total Purgeable Hydrocarbons (C6-Cl2), BTEX and MTBE in Air by DHS LUFT - QuaIity Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level' Result %REC Limits RPD Limit Notes <br /> Batch 1020132-EPA 5030B(P/T) <br /> Blank(1020I32-BLKI) Prepared&Analyzed: 02/07/01 <br /> Purgeable Hydrocarbons ND 10.0 mg/m'Air <br /> Benzene ND 0.0500 " <br /> Toluene ND 0.0500 " <br /> Ethylbenzene ND 0.0500 " <br /> Xylenes(total) ND 0.0500 " <br /> Methyl tert-butyl ether ND 0.500 " <br /> Surrogate:a,a,a-TrVZuorotoluene 2.20 2.00 110 60-140 <br /> LCS(1020132-BSI) Prepared&Analyzed: 02/07/01 <br /> Benzene 2.01 0.0500 mg/m'Air 2.00 100 70-130 <br /> Toluene 2.14 0.0500 2.00 107 70-130 <br /> Ethylbenzene 2.20 0.0500 2.00 110 70-130 <br /> enes(total) 5.70 0.0500 6.00 95.0 70-I30 <br /> iyl tert-butyl ether 1.84 0.500 2.00 92.0 70-130 <br /> Surrogate:a,a,a-Trifluororoluene 2.26 2.00 113 60-140 <br /> LCS Dup (1020132-BSDI) Prepared&Analyzed: 02/07/01 <br /> Benzene 2.06 0.0500 rng/tn'Air 2.00 103 70-130 2.46 25 <br /> Toluene 2.18 0.0500 2.00 109 70-130 1.85 25 <br /> Etihylbernzene 2.24 0.0500 2.00 112 70-130 1.80 25 <br /> Xylenes(total) 5.82 0.0500 6.00 97.0 70-130 2.08 25 <br /> Methyl tert-butyl ether 1.90 0.500 2.00 95.0 70-130 3.21 25 <br /> Surrogate:n,a,a-TriJluorotoluene 2.16 2.00 108 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 /> 0 <br /> 4of6 <br />