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Sequoia <br /> • . 1455 McDowell Blvd,North Ste D <br /> e uoia <br /> Petaluma,CA 94954 <br /> S <br /> Y (,07),92-1866 <br /> Analytical .sequ,) labsxo2 <br /> www.sequoialabs.com <br /> ' MACTEC E&C-Petaluma Project:General Commercial P412379 <br /> 5341 Old Redwood Highway,Suite 300 Project Number:Sears/Cracy-UST/AST-3205040383.02 Reported: <br /> Petaluma CA,94954 Project Manager.Gary Lieberman 01/05/05 10:53 <br /> Total Metals by EPA 6000/7000 Series Methods-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 4120470-EPA 7471A/EPA 7471A <br /> Blank(4120470-BLKI) Prepared: 12/27/04 Analyzed: 12/28/04 <br /> Mercury No 0.019 mg/kg <br /> Laboratory Control Sam le(4120470-BSI) Prepared 12/27/04 Analyzed: 12/28/04 <br /> Mercury 0.125 0.016 mg/kg 0.107 117 80-120 <br /> ' Matrix Spike(4120470-MS1) Source:P412379-01 Prepared: 12/27/04 Analyzed: 12/28/04 <br /> Mercury 0.122 0.018 mg/kg 0.118 0.016 90 80-120 <br /> Matrix Spike Dup(4120470-MSDI) Source:P412379-01 Prepared: 12/27/04 Analyzed: 12/28/04 <br /> Mercury. 0.114 0.018 mg/kg 0.119 0.016 82 80-120 7 20 <br /> 1 <br /> 1 <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 entirety. <br /> Page 37 of 46 <br />