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Sequoia <br />Analytical <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />www.sequoialabs.com <br />Kleinfelder - Stockton <br />Project: Trade Way <br />2825 East Myrtle Street <br />Project Number: 20-3978-03.CH-V <br />Reported: <br />Stockton CA, 95205 <br />Project Manager: Joe Zilles <br />06/04/02 14:06 <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC <br />RPD <br />Anakic <br />Result Limit Units Level Result %REC Limits RPD <br />Limit Notes <br />Batch 2050266 - EPA 5030B IP/TI <br />Blank (2050266-BLKi) <br />Prepared & Analyzed: 05/28/02 <br />Tert-butyl alcohol <br />ND 0.050 mg/kg <br />Methyl tert-butyl ether <br />ND 0.0050 " <br />Di -isopropyl ether <br />ND 0.0050 " <br />Ethyl tert-butyl ether <br />ND 0.0050 " <br />Tert-amyl methyl ether <br />ND 0.0050 " <br />Ethanol <br />ND 0.20 " <br />Surrogate: 1,2 -DCA -d4 <br />0.0466 0.0500 93 60-140 <br />LCS (2050266-BS1) <br />Prepared & Analyzed: 05/28/02 <br />Methyl tert-butyl ether v <br />0.0371 0.0050 mg/kg 0.0436 85 60-140 <br />Surrogate: 1,2 -DCA -d4 <br />0.0460 110.0500 91 60-140 <br />Matrix Spike (2050266 -MSI) <br />Source: S205235-03 Prepared & Analyzed: 05/28/02 <br />Methyl tert-butyl ether <br />0.0363 0.0050 mg/kg 0.0436 ND 83 60-140 <br />Surrogate: 1,2 -DCA -d4 <br />0.0464 110.0500 93 60-140 <br />Matrix Spike Dup (2050266-MSD1) <br />Source: S205235-03 Prepared & Analyzed: 05/28/02 <br />Methyl cert -butyl ether <br />0.0376 0.0050 mg/kg 0.0436 ND 86 60-140 4 <br />25 <br />Surrogate: 1,2 -DCA -d4 <br />0.0467 0.0500 93 60-140 <br />Sequoia Analytical - Sacramento <br />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 />p� Page I 1 of 13 <br />`IS6 <br />