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.� <br /> Sequoia 1455 McDowell Blvd,North Ste D <br /> iz_ Petaluma,CA 94954 <br /> IW Analytical (707)792-1865 <br /> FAX(707)792-0342 <br /> www sequoialabs com <br /> r• <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P312285 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/07/04 16 58 <br /> Industnal Solvents by EPA Method 8015B modified- Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3L22003-EPA 3810 Headspace <br /> Matrix Spike Du 3L22003-MSD1 Source P312285-23 P ared&Analyzed 12/22/03 <br /> Methanol 963 100 ugtl 1000 ND 963 68-130 1 99 19 <br /> Surrogate 1pentanol 2580 2500 103 62_129 <br /> i <br /> Sequoia Analytical-Petaluma <br /> 9 Yt The results in this report apply to the samples analyzed in accordance with the churn <br /> isof cuslody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 24 of35 <br />