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a_ _� <br /> SAve Ste 8 <br /> Sequoia Saeracramentoeritn CA 95834 <br /> (916)921 9660 <br /> e nnIVti1-511 FAX(916)921 0100 <br /> J "`" www sequoialabs corn <br /> E <br /> er-Ryan-Petaluma Project Tosco 11192,Stockton,CA S212209 N McDowell Blvd Ste B2 Project Number N/A Reported <br /> uma CA,04954 Project Manager Dave Vossler 12/31/02 11 16 <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 Headspace <br /> Blank(2LI8006-BLKI) Prepared&Analyzed 12/18/02 <br /> Methanol ND 10 mg/kg <br /> Surrogate I-pentanol 263 250 105 76-172 <br /> Laboratory Control Sample(2L18006-BSI) Prepared&Analyzed 12/18/02 <br /> Methanol 102 10 mg/kg 100 102 86 153 <br /> Surrogate 1-pentanol 253 11 250 101 76-172 <br /> Matrix Spike(2L18006-MS1) Source MLL0344-02 Prepared&Analyzed 12/18/02 <br /> Methanol 902 1 0 mg/kg 100 ND 902 86-153 <br /> Surrogate I-pentanol 224 " 250 896 76 172 <br /> Matrix Spike Dup(2L18006-MSDI) Source MLL0344-02 Prepared&Analyzed 12/18/02 <br /> Methanol 947 10 mg/kg 100 ND 947 86 153 487 25 <br /> Surrogate I pentanal 229 1250 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 hasis <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 13 <br />