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• 404 N.Wiget Lane <br /> Se.quola Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> Anal.ytical www.seguolalabs.com <br /> Gett7erRyan,Inc.-Dublin +Project: Chevron <br /> 6747 Sierra Court Suite J Project Number: Chevron 49-6258 Reported: <br /> Dublin CA,94568 <br /> Project Manager: Deanna L.Harding 1 l-Aug-00 07:27 <br /> Industrial Solvents,by EPA Method 8015 (modified)- Quality Control " <br /> Sequoia Analytical - Morgan Hill <br /> ;q ik <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch OG31004-EPA 3810,Headspace ? f! <br /> Blank(OG31004-BLKI) Prepared&Analyzed: 31-Jul-00 i <br /> Methanol ND 1.00 mg/1 <br /> Svrroga[e:1 pentanol 5.12 115.00 102 55-157 <br /> Surrogate:1 pentanol(dbwax) 4.42 .1 5.00 88.4 57-170 <br /> k <br /> LCS(OG31004-BSI) Prepared&Analyzed:31-Jul-00 <br />+� Methanol 8.59 I.00 mg/1 8.00 107 70-130 <br /> 1 Surrogate:l-pentanol 5.55 '`5.00 III 55-157 <br /> Surrogate:1 pentanol(dbwax) 4.64 ;5.00 92.8 57-170 <br /> Matrix Spike(OG31004-MSI) + Source: MJG0806-02 Prepared&Analyzed:31-Jul-00 <br /> i Methanol 9.47 1.00 mg/1 8.00 ND 118 50450 s <br /> Surrogate'1 pentanol 6.37 15.00 127 55-I S7 } <br /> S'` ante:I pentrnol(dbwax) 4.98 S.00 99.6 57-170 a <br /> i Spike-Dup(OG31004-MSD1) Source:MJG0805-02 Prepared&Analyzed:31-Jul-0O <br /> Methanol 9.32 1.00 mg/1 x`8.00 ND 116 50-150 1.60 50 <br /> Surrogate:1 pentanol 6.55 5.00 131 55-157 <br />[ Surrogate:1 pentanol(dbwmr) 5.66 5.00 113 57-170 <br /> I <br /> Lf <br /> a i <br /> a <br /> i <br /> 3 <br /> i <br /> Se-oia Analytical-Walnut Creek 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 8 of 9 <br />