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1 <br /> Sequoia 819 Sento Ave Ste <br /> 834 <br /> Sacramento CA 95834 <br /> Analytical (9)6)921 9600 <br /> FAX(916)921-0190 <br /> www sequoialabs com <br /> Geological Technics,Inc Project Cardoza S412155 <br /> 1101 7th Street Project Number 662 2 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 12/21/04 12 02 <br /> Industrial Solvents by EPA Method 8015B modified-Quality Control <br /> ' Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyto Result Limit Units Level Result %RFC Limits RPD Ltmtt Notes <br /> ' Batch 4L14016-EPA 3810 Heads ace I EPA 8015Bm <br /> Blank(4L14016-BLKI) Prepared&Analyzed 12/14/04 <br /> Methanol ND 100 ug/l <br /> Surrogate I pentanol 2490 2500 100 62-129 <br /> Laboratory Control Sample(4L14016-BSI) Prepared&Analyzed 12/14/04 <br /> ' Methanol 972 100 ug/1 1000 97 68-130 <br /> Surrogate 1 pentanol 2550 112500 101 62-119 <br /> Matrix Spike(41,14016-MS1) Source MNL0324-04 Prepared&Analyzed 12/14/04 <br /> ' Methanol 925 100 ug/l 1000 ND 92 68-130 <br /> Surrogate 1 pentanol 1640 112500 66 62-119 <br /> Matnx Spike Dup(4L14016-MSD1) Source MNLO324-04 Prepared&Analyzed 12/14/04 <br /> ethanol 1010 100 ug/1 1000 ND 101 68-130 9 19 <br /> urrogate 1 pentanol 2390 2500 96 62-129 <br /> 1 <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 7 of 12 <br />