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1. <br />• <br />• <br />8195irlAve Ste8 <br />Mercury <br />Sequoia <br />mg/kg <br />cra <br />Samentoto , CA 95834 <br />/ ! R <br />(916)921-9600 <br />Mercury <br />,{, Ilalytical <br />`f i 1 <br />mgikg <br />0.417 80 80-120 <br />Matrix Spike (5010427 -MSI) <br />Source: S501572-01 <br />ww.seg6)921-0100 <br />www.sequoiala6s.com <br />Central Valley Waste Services Project:Wash Pad Sludge 5501572 <br />P.O. Box 241001 Project Numbern/a Reported; <br />Lodi CA, 95241 Project Manager:C. Kennedy 02/11/05 10:51 <br />Total Metals by EPA 6000/7000 Series Methods - Quality Control <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Unite Level Result %REC Limits RPD Limit Notes <br />Batch 5010427 - EPA 7471A / EPA 7471A <br />Blank (5010427-BLKI) <br />Prepared &Analyzed: 01/31/05 <br />Mercury <br />ND 0.020 <br />mg/kg <br />Labomtory Control Sample (5010427 -BSI) <br />Prepared & Analyzed: 01/31/05 <br />Mercury <br />0.335 0.020 <br />mgikg <br />0.417 80 80-120 <br />Matrix Spike (5010427 -MSI) <br />Source: S501572-01 <br />Prepared & Analyzed: 01/31/05 <br />Mercury <br />0.379 0.020 <br />mglkg <br />0.417 0.048 79 75-125 <br />Matrix Spike Dup (5010427-MSD1) <br />Source: S501572-01 <br />Prepared & Analyzed: 01/31/05 <br />Mercury <br />0.402 0.020 <br />mg/kg <br />0.417 0.049 85 75-125 6 20 <br />Sequoia Analytical - Sacramento yhe 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 repon must be reproduced in its entirety. <br />Page 7 of 9 <br />