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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 -0 100 <br />www.sequoialabs.com <br />Kleinfelder - Stockton Project: Trade Way <br />2825 East Myrtle Street Project Number: 20-3978-03.CH-V Reported: <br />Stockton CA, 95205 Project Manager: Joe Zilles 06/04/02 14:06 <br />Industrial Solvents by EPA Method 8015B modified - Quality Control <br />Sequoia Analytical - Morgan Hill <br />Reporting Spike Source %REC RPD <br />Lnalyte Result Limit Units Level Result %R -EC Limits RPD Limit Notes <br />Batch 2E28009 - EPA 3810 fleadspace <br />Blank (2E28009-BLKI) Prepared & Analyzed: 05/28/02 <br />Methanol ND 1.0 mg/kg <br />Surrogate: /pentanol 5.66 5.00 113 31-166 <br />LCS (2E28009 -BSI) Prepared & Analyzed: 05/28/02 <br />Methanol 9.13 1.0 mg/kg 8.00 114 50-150 <br />Surrogate: 1 pentanol 5.60 115.00 112 31-166 <br />Matrix Spike (2E28009 -MSI) Source: S205280-01 Prepared & Analyzed: 05/28/02 <br />Methanol 7.96 1.0 mg/kg 8.00 ND 99.5 50-150 <br />Surrogate: 1 pentanol 4.88 5.00 97.6 31-166 <br />Matrix Spike Dup (2E28009-MSD1) Source: S205280-01 Prepared & Analyzed: 05/28/02 <br />Methanol 8.31 1.0 mg/kg 8.00 ND 104 50-150 4.30 50 <br />Surrogate: 1 pentanol 4.95 5.00 99.0 31-166 <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 />Page 12 of 13 <br />