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Ave Ste 8 <br /> Sequoia Sacramento rCA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> ettler-lZyan-Petaluma Protect Tosco 1 1 192,Stockton,CA 5212192 <br /> 1364 N McDowell Bkvd Ste B2 Protect Number NIA Reported <br /> Petaluma CA,94454 Project Manager Dave Vossler 12/20/02 14 03 <br /> Industrial Solvents by EPA Method 8015B modified - Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2L18006-EPA 3810 Heads ace <br /> Blank(2L18006-BLKI) Prepared&Analyzed 12/18/02 <br /> Methanol ND 10 mg/kg <br /> Suirogaie 1 pentanol 263 250 105 76-172 <br /> Laboratory Control Sample(2L18006-BSI) Prepared&Analyzed 12/18/02 <br /> Methanol 102 1 0 mg/kg 100 102 86-153 <br /> i <br /> Surrogate 1 pentanol 253 250 101 76-172 <br /> Matrix Spike(2L18006-MSI) Source S212192-02 Prepared&Analyzed 12/18/02 <br /> Methanol 902 1 0 mg/kg 100 ND 902 86-153 <br /> ogate 1 pentanol 22 4 25 0 89 6 76-172 <br /> Matrix Spike Dup(2L18006-MSD1) Source 5212192-02 Prepared&Analyzed 12/18/02 _ <br /> Methanol 947 — 1 0 mg/kg 100 ND 947 86-153 487 25 <br /> Surrogate 1 pentanol 229 250 916 76-172 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 9 of 10 <br />