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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 />Total Purgeable Hydrocarbons and BTEX by DHS LUFT - 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 2060073 - EPA 5030B (P/T) <br />Matrix Spike (2060073-MS1) <br />Source: S205368-08 <br />Prepared & Analyzed: 06/06/02 <br />Benzene <br />9.61 0.50 ug/I <br />ND 60-140 <br />Toluene <br />10.3 0.50 <br />ND 60-140 <br />Ethylbenzene <br />10.6 0.50 <br />ND 60-140 <br />Xylenes (total) <br />33.2 0.50 <br />ND 60-140 <br />Surrogate: a,a,a-Tris luorotoluene <br />10.5 <br />10.0 105 60-140 <br />_Matrix Spike Dup (2060073-MSDl) <br />Source: S205368-08 <br />Prepared & Analyzed: 06/06/02 <br />Benzene <br />10.6 0.50 ug/I <br />ND 60-140 <br />10 <br />25 <br />Toluene <br />11.3 0.50 <br />ND 60-140 <br />9 <br />25 <br />Ethylbenzene <br />11.6 0.50 <br />ND 60-140 <br />9 <br />25 <br />Xylenes (total) <br />36.2 0.50 <br />ND 60-140 <br />9 <br />25 <br />Surrogate. a,a,a-Tris luorotoluene <br />Sequoia Analytical - Sacramento <br />10.9 <br />10.0 109 60-140 <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 />0 <br />Page 8 of 11 <br />