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�- <br /> a— ) (707) <br /> 1A55 McDowell Blvd North SteSequoia Petaluma,CA94954791-1865 <br /> Analytical FAX(707)792 0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2186,Stockton,CA P406360 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36593 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarih 07/29/04 07 39 <br /> Industrial Solvents by EPA Method 8015B modified - Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spice Source '/oREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4)1''29007-EPA 3810 Headspace <br /> Matrix Spike Dup(4F29007-MSD]) Source P406360-04 Prepared&Analyzed 06/29/04 <br /> Methanol 1510 100 ug/l 1000 590 � 92 --' 66-130 1 19 r <br /> Surrogate I pentanol 2420 2500 97 62-119 <br /> • <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed to 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 entirely <br /> Page 14 of 21 <br />