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Sequoia: <br /> 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> www,sequoialabs.coin <br /> Delta Environmental Consultants(Cameron Park) Project: Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number-, N/A Reported: <br />{ Cameron Park CA,95682 Project Manager. Jay Johnson 09/20/01'11:31 <br /> i <br /> Total Pargeable Hydrocarbons and BTEX by DHS LUFT-Quality Control <br /> Sequoia Analytical-Sacramento <br /> 1. <br /> Reporting Spike Source %RF-C RPD 1 <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes'' <br /> Batch 1090I37-EPA 5030B(MeOH) <br /> Blank(1090137-BLKI) Prepared&Analyzed:09/12/01 <br /> Purgeable Hydrocarbons ND 5.0 mg/kg <br /> a <br /> Benzene ND 0.025 " <br /> Toluene ND 0.025 " <br /> Ethylbenzene ND 0.025 <br /> Xylenes(total) ND 0.025 " <br /> I <br /> Surrogate:a,a,a-Trifluorotoluene 1.08 1.00 108 60-140 j <br /> LCS 1090137-BS1 Prepared&Analyzed:09/12/01 <br /> Benzene 1.03 0.025 mg/kg 1.00 103 70-130 <br /> Toluene 1.03 0.025 1.00 103 70-130 <br /> Ethylbenzene 0.991 0.025 1.00 99.1 70-130 } <br /> jl Xylenes(total) 2.78 0.025 3.00 92.7 70-130 <br /> Surrogate:a,a,a-Tri luorotoluene 1.17 1,00 117 60-140 <br /> Matrix Spike(1090137-MSI) Source;5109122-01 Prepared&Analyzed:09/12/01 <br /> Benzene 0.895 0.025 mg/kg 1.00 ND 88.8 60-140 <br /> Toluene 0.925 . 0.025 1.00 ND 91.5 60-140 j <br /> Ethylbenzene 0.898 0.025 1.00 ND 89.3 60-140 <br /> Xylenes(total) 2.53 0.025 3.00 ND 83.6 60-140 '. <br /> Surrogate:a,a,a-Trifluorotoluene 1.14 1.00 114 60-140 <br /> Matrix Spike Dnp(1090137-MSDI) Source:S109122-01 Prepared&Analyzed:09/12/01 _ <br /> Benzene 0.880 --0.025 mg/kg 1.00 ND 87.3 60-140 1.69 25 t <br /> Toluene 0.915 0.025 1.00 ND 90.5 60-140 1.09 25 r <br /> i Ethylbenzene 0.891 0.025 1.00 ND 88.6 60-140 0.783 25 <br /> Xylenes(total) 2-49 0.025 3.00 ND 82.2 60-140 1.59 25 + <br /> Surrogate:a,a,a-Trifluorotoluene 1.19 1.00 119 60-140 ! <br /> I - <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must he reproduced in its entirety. <br /> r. <br /> Page Page 19 of,24 <br />