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" ]455 McDowell Blvd,North Ste <br /> a— <br /> Sequoia Petaluma,CA 949544 <br /> Analytical FAX(707)792-1865 <br /> (707)792-0342 <br /> • wwwsequoialabs.com <br /> URS Corp-Sacramento Project: Arco Site 5469,Stockton,CA P312283 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 01/12/04 18:12 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC APD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3120374-EPA 301 OA <br /> Blank(3120374-BLK1 Pre ared&Analyzed: 12/23/03 <br /> Iron ND 300 ugll <br /> Laboratory Control Sample 3120374-BSI Prepared&Analyzed: 12/23/03 <br /> Iron 5250 300 ug/l 5000 105 SO-120 <br /> Laboratory Control Sample Du 3120374-BSD1 Prepared&Anal zed: 12/23/03 <br /> Iron 5230 300 uo 5000 105 80-120 0.4 20 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. Unless otherwise slated, results are reported on a wet weight <br /> basis. This analytical report must he reproduced in its entirety. <br /> Page 28 of 40 <br />