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Sequoia 819 Striker Ave Ste8 <br /> Sacmmrnm,CA 95534 <br /> Analytical (916)921-9600 <br /> FAX(916)921.0100 <br /> www.sequaialabs.com <br /> ' RNC Environmental LLC Project:SchmidtUST INVEST1GATlON <br /> 9746 Parktree Way S504150 <br /> y Project Ntanber:- Reported: <br /> Elk Grove CA,95624 Project Manager.Robert A.Nicholson <br /> 04/20/05 18:50 <br /> Total Metals by EPA 6000/7000 Series Methods- Quality Control <br /> North Creek Analytical-Bothell <br /> Reporting Spike Source %REC RPD <br /> Result Limit Units Level Result %REC Limits RPD Limit Vons <br /> Batch 5D13017-EPA 3050B/EPA 6020 <br /> Blank(51)13017-BLKI) Prepared:04/13/05 Analyzed:04/14/05 <br /> Lead ND 0.500 mg/kg _- <br /> Laboratory Control Sample(5D13017-BSI) Prepared:04/13/05 Analyzed:04/14/05 <br /> Lead 38.4 0.500 mg/kg 40.0 96.0 80420 <br /> Laboratory Control Sample Dap(5D13017-BSDI) Prepared:04/13/05 Analyzed:04/14/05 <br /> Lead 38.4 0.500 mg/kg 40.0 96.0 80-120 000 20 <br /> Matrix Spike(5D13017-MSI) Source:5504150-01 Prepared:04/13/05 Analyzed:04/14/05 <br /> Lead 44.4 0.500 mgtkg 41.2 3.51 99.2 62-137 -- <br /> ' Matrix Spike Dup(5D13017-MSDI) Source:S504150-01 Prepared:04/13/05 Analyzed:04/14/05 _ <br /> Lead 46.0 0.500 mg/kg 42.6 3.51 99.7 62-137 3.54 30 <br /> Post Spike(5D13017-PS1) Source:S50415041 Prepared:04/13/05 Analyzed:04/14/05 <br /> Lead 53.8 0.500 mg/kg 51.8 3.51 97.1 75-125 <br /> 1 <br /> Sequoia Analytical-Sacramento 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 analyrsbal report must be reproduced in its entirety. <br /> Page 5 of 8 <br />