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Sequoia <br />Analytical <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916)921-9600 <br />FAX (916) 92 1 -0 100 <br />www.sequoialabs.com <br />Kleinfelder - Stockton Project: Trade Way <br />2825 East Myrtle Street Project Number: 20-3978-03.Chev Reported: <br />Stockton CA, 95205 Project Manager: Joe Zilles 06/12/02 16:26 <br />Industrial Solvents by EPA Method 8015B modified - Quality Control <br />Sequoia Analytical - Morgan Hill <br />Reporting Spike Source %REC RPD <br />knalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 2FO4010 - EPA 3810 Headspace <br />Blank (2F04010-BLK1) Prepared & Analyzed: 06/04/02 <br />Methanol ND 100 ug/l <br />Surrogate: 1 pentanol 2540 112500 101 55-157 <br />LCS (2F04010 -BSI) Prepared & Analyzed: 06/04/02 <br />Methanol 1140 100 ug/l 1000 114 50-150 <br />Surrogate: !-pentanol 2890 112500 116 55-157 <br />Matrix Spike_(2F04010-MS1) Source: S205350-01 Prepared: 06/04/02 Analyzed: 06/05/02 <br />Methanol 1190 100 ug/1 1000 110 108 50-150 <br />Surrogate: !-pentanol 2920 111500 117 55-157 <br />Matrix Spike Dup (2F04010-MSD1) Source: S205350-01 Prepared: 06/04/02 Analyzed: 06/05/02 _ <br />Methanol 1310 100 ug/1 1000 110 120 50-150 9.60 30 <br />Surrogate: 1-pentanol <br />Sequoia Analytical - Sacramento <br />3190 <br />11 2500 128 55-157 <br />The results in this report apply to the samples analyzed in accordance with tl:e chain of <br />custody document. This analytical report must be reproduced in its entirely. <br />Page 10 of 1 1 <br />