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819 Striker Avenue,Suite 8 <br /> I k ; Sequoia Saeramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www.sequoialabs.com <br /> Stratus Environmental Proj«t: ARCO 434,Lodi,CA <br /> 3330 Cameron Park Drive,Ste.550 Project Number: 434,Lodi,CA Reported: <br /> 1. <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 08/19/02 14:41 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> too 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/TI <br /> Blank(2080146-BLK1) 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 /> tooEthyl tert-butyl ether ND 0.0050 " <br /> Tert-amyl methyl ether ND 0.0050 " <br /> Ethanol ND 0.20 " <br /> too Surrogate:1,2-DCA-d4 0.0552 " 0.0500 110 60-140 <br /> LCS(208014&BS1) Prepared&Analyzed:08/16/02 <br /> Methyl tert-butyl ether 0.0371 0.0050 mg/kg 0.0436 85 60.140 <br /> r Surrogate:1,2-DCA-d4 0.0457 0.0500 91 60-140 <br /> Matrix Spike(2080146-MSI) Source:S208200-03 Prepared&Analyzed:08/16/02 <br /> Methyl tert-butyl ether 0.0410 0.0050 mg/kg 0.0436 ND 93 60-140 <br /> Surrogate:1,1-DCA-d4 0.0465 0.0500 93 60-140 <br /> Matrix Spike Dup(2080146-MSDI) Source:5208200-03 Prepared&Analyzed:08/16/02 <br /> too 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 /> r <br /> L <br /> two <br /> r <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 /> r <br /> Page Page 7 of 8 <br />