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iz' 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> _ (707)792-1865 <br /> .Analytical FAX(707)792-0342 <br /> J www.sequoialahs.com <br /> URS Corp-Sacramento Project: Arco Site 5469, Stockton,CA P305380 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 06/18/03 21:10 <br /> Anions by EPA Method 300.0 -Quality Control <br /> Sequoia Analytical -Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC limits RPD Limit Notes <br /> Batch 3050513-General Preparation <br /> Matrix Spike Dup(3050513-MSD1) Source:P305163-04 Prepared&Analyzed:05/20/03 <br /> Sulfate as SO4 48400 5000 ugll 25000 23000 102 80-120 0 20 <br /> Nitrate as N 28800 1000 25000 9700 76 80-120 1 20 QM-07 <br /> Sequoia Analytical-Petaluma 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 enttrery. <br /> Page 35 of 36 <br />