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819 Striker Avenue,Suite 8 <br /> ' <br /> Sequoia Sacramento,CA 95834 <br /> r 4-D.. ,'1. (916)921-9600 <br /> Analytical FAX(916)921.0100 <br /> www.sequoialabs.com <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 09/24/41 17:12 <br /> Total Pur eable Hydrocarbons and BTEX b DHS LUFT- <br /> � Y y Quality Control <br /> Sequoia Analytical-Sacramento <br /> t Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %R-FC Limits RPD Limit Notes <br /> +} Batch 1090196-EPA 5030E(MeOFI <br /> + Blank(1090196-BLK1) 1 - .- Prepared&Analyzed:09/18_/01 <br /> Purgeable Hydrocarbons ND 5.0 mg/kg' <br /> Benzene i ND 0.025 " <br /> Toluene ND 0.025 " <br /> Ethylbenzene t ND 0.025 " <br /> Xylenes(total) ND 0.025 " <br /> Surrogate:a,a,a-Trifluorotoluene 1.15 " 1.00 115 60-140 <br /> LCS(1090296-BS1) Prepared&Analyzed:09/18/01 <br /> ' Benzene 1.13 0.025 mg/kg 1.00 113 70-130 <br /> f <br /> Toluene ( 1.08 0.025 " 1.00 108 70-130 <br /> Eth ]benzene <br /> i Y 5 1.10 0.025 1.00 110 70-130 <br /> ' Xylenes(total) 3.17 0.025 3.00 106 70-130 <br /> Surrogate;a,a,a-Trifluorotoluene 1.14 1.00 114 60-140 <br /> Matrix Spike(10.90196-MSI) Source:5109229-21 Prepared&_Analyzed:09/18/01 _ <br /> Benzene 0.969 0.025 mglkg 1.00 ND 96.9 60-140 <br /> Toluene 0.890 0.025 1.00 ND 89.0 60-140 <br /> Ethylbenzene 0.901 0.025 1.00 ND 90.1 60-140 <br /> Xylenes(total) 2.62 0,025 3.00 ND 87.3 60-140 <br /> Surrogate:a,a,a-Trifluorotoluene 0.974 1,00 97.4 60-140 <br /> Matrix Spike Dup(1090106-MSD2) Source:S109229-21 Prepared&Analyzed:09/18/01 _ <br /> Benzene „- 1.14 0.025 mg/kg 1.00 ND 114 60-140 16.2 25 <br /> Toluene l 1.05 0.025 111.00 ND 105 60-140 16.5 25 <br /> Ethylbenzene 1.08 0.025 1.00 ND 108 60-140 18.1 25 <br /> Xylenes(total) # 3.12 0.025 " 3.00 ND 104 60-140 17.4 25 <br /> Surrogate;a,a,a-Trifluorotoluene 1.17 1.00 117 60-140 <br /> :I <br /> I� <br /> I . <br /> 1f <br /> i <br /> Y <br /> t <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 be reproduced in its entirety. <br /> i <br /> 1 <br /> Page Page 7 of 9 <br /> 4 <br />