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0. <br />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 />Volatile Organic Compounds by EPA Method 8260B - 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 2060034 - EPA 5030B 1P/T1 <br />Blank (2060034-BLKI) <br />Prepared & Analyzed: 06/05/02 <br />Tert-butyl alcohol <br />ND <br />5.0 ug/1 <br />vlethyl cert -butyl ether <br />ND <br />0.50 " <br />:)i -isopropyl ether <br />ND <br />0.50 " <br />Ethyl tert-butyl ether <br />ND <br />0.50 " <br />Cert -amyl methyl ether <br />ND <br />0.50 " <br />:thanol <br />ND <br />50 " <br />Surrogate: 1,2 -DCA -d4 27.4 25.0 110 60-140 <br />SCS (2060034-BS1) Prepared & Analyzed: 06/05/02 <br />.vlethyl tert-butyl ether 10.8 0.50 ug/1 10.9 99 60-140 <br />Surrogate: 1,2 -DCA -d4 17.7 15.0 111 60-140 <br />.CS Dup (2060034-BSD1) Prepared & Analyzed: 06/05/02 _ <br />Methyl tert-butyl ether 11.1 0.50 ug/l 10.9 102 60-140 3 25 <br />3urrogate:1,2-DCA-d4 27.5 " 25.0 110 60-140 <br />_Matrix Spike (2060034 -MSI) Source: S205337-01 Prepared & Analyzed: 06/05/02 _ <br />Methyl tert-butyl ether 61.3 0.50 ug/1 25.0 32 117 60-140 <br />>urrogate:l,2-DCA-d4 17.9 " 25.0 111 60-140 <br />Matrix Spike Dup (2060034-MSD1) Source: S205337-01 Prepared & Analyzed: 06/05/02 <br />Methyl tert-butyl ether 60.5 0.50 ug/l 25.0 32 114 60-140 1 25 <br />Surrogate: 1,2 -DCA -d4 18.4 15.0 114 60-140 <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 entirely. <br />Page 9 of 1 1 <br />