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• • 819 Striker Avenue,Suite 8 , <br /> Sequoia Sacramento,CA 95834 <br /> IWAnalytical (916)921-9600 <br /> .7 FAX(916)921-0100 ' <br /> www.sequoialabs.com <br /> Stratus Environmental Project: ARCO 760,Lodi,CA <br /> 3330 Cameron Park Drive,Ste.550 Project Number: 760,Lodi,CA Reported: ' <br /> Cameron Park CA,95682 Project Manager. Jay Johnson 08/22/02 14:11 <br /> Volatile Organic Compounds by EPA Method 8260B-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 2080146-EPA 5030B[P/T] <br /> Blank(2080146-BLKl) Prepared&Analyzed 08/16/02 <br /> Tert butyl alcohol ND 0.050 mg/kg <br /> Methyl tert-butyl ether ND 0.0050 " <br /> Di-isopropyl ether ND 0.0050 " <br /> Ethyl tert-butyl ether ND 0.0050 <br /> Tert-amyl methyl ether ND 0.0050 t <br /> Ethanol ND 0.20 " <br /> Surrogate:1,2-DCA-d4 0.0552 0.0500 110 60-140 <br /> LCS(2080146-BSI) Prepared&Analyzed:08/16/02 <br /> Methyl tert-butyl ether 0.0371 0.0050 mg/kg 0.0436 85 60-140 <br /> Surrogate:1,2-DCA-d4 0.0457 11 0.0500 91 60-140 <br /> Matrix Spike(2080146-MS1) Source:5208200-03 Prepared&Analyzed:08/16/02 <br /> Methyl tert-butyl ether 0.0410 0.0050 mg/kg 0.0436 ND 93 60-140 <br /> Surrogate:1,2-DCA-d4 0.0465 11 0.0500 93 60-140 <br /> Matrix Spike Dup(2080146-MSD1) Source:S208200-03 Prepared&Analyzed:08/16/02 <br /> Methyl tert-butyl ether 0.0440 0.0050 mg/kg 0.0436 ND 100 60-140 7 25 <br /> Surrogate:1,2-DCA-d4 0.0468 0.0500 94 60-140 <br /> Sequoia Analytical-Sacramento The results in this apply re ort to the samples analyzed ed in accordance with the chain i <br /> Pyz <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> Page Page 10 of l 1 <br />