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Sequ®1a 8]9 rarAvenue.Suite8 <br /> 1 [.� Sacacramento,CA 95834 <br /> ® (916)921-9600 <br /> Analytical wFAX(916)921-0100 <br /> ww.sequoialabs.com <br /> I <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: NIA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 06/18/01 17:48 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creek j <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Limit Notes <br /> Batch IF04008-BPA 5030E P/T <br /> Blank(IF04008-BLK1) Prepared&Analyzed:06/02/01 <br /> Purgeable Hydrocarbons -ND 10 mg/m'Air <br /> Benzene ND 0.10 " <br /> Toluene ND 0.10 " <br /> Ethylbenzene ND 0.10 " <br /> Xylenes(total) ND 0.10 <br /> Methyl tert-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-TrIJ7uorotoluene 5.28 6.00 88.0 70-130 <br /> Blank(1F04008-BLK2) Prepared&Analyzed:06/06/01 <br /> Purgeable Hydrocarbons ND 10 mg/m'Air <br /> Benzene ND 0.10 " <br /> fitn,elzene <br /> ND .0.10 ND 0.10 <br /> Xylenes(total) ND 0.10 " <br /> Methyl tert-butyl ether ND 0,50 <br /> Surrogate:a,a,a-Trifluorotoluene 5.50 6.00 91.7 70-130 <br /> LCS(IF04008-BSI) _ Prepared&Analyzed:06/06/01 <br /> Benzene 1.43 0.10 mg/m'Air 2.00 71.5 70-130 <br /> Toluene 2.08 0.10 2.00 104 70-130 <br /> Ethylbenzene 2.08 0.10 2.00 104 70-130 <br /> Xylenes(total) 6.60 0.10 6.00 110 70-130 <br /> Surrogate:a,a,a-Trrfluorotoluene 5.24 6.00 87.3 70-130 <br /> LCS(1F04008-BS2) _ Prepared&Analyzed:06/02/01 <br /> Benzene 4.50 0.10 mg/m'Air 4.00 112 70-130 <br /> Toluene 3.72 0.10 4.00 93.0 70-130 <br /> Ethylberizene 3.60 0.10 4.00 90.0 70-130 <br /> Xy€eves(total) 11.6 0.10 12.0 96.7 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 5.74 6.00 95.7 70.130 <br /> �uoia 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 he reproduced in its entirety. <br /> Page 4 of 5 <br />