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Sequoia �s <br />� Analytical <br />} , <br />819 Striker Avenue, Suite <br />Sacramento, CA 9583 <br />(916)921-9600 <br />FAX (916) 921-010^ <br />www.sequolalabs. cor� <br />Total Metals by EPA 6000/7000 Series Methods - Quality Control <br />J <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source %REC RPD <br />Analyte <br />Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 3080254 - General Preparation <br />Blank (3080254-BLKI) <br />Prepared & Analyzed: 08/18/03 <br />Hexavalent Chromium <br />ND 0.25 mg/kg <br />Laboratory Control Sample (3080254 -BSI) <br />Prepared & Analyzed: 08/18/03 <br />Hexavalent Chromium <br />2.52 0.25 mg/kg 2.50 101 85-115 <br />Laboratory Control Sample Dup (3080254-BSDI) Prepared & Analyzed: 08/18/03 <br />Hexavalent Chromium <br />2.52 0.25 mg/kg 2.50 101 85-115 0 200 <br />J <br />�3 <br />J <br />3J <br />Sequoia Analytical - Sacramento <br />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 ort a wet weight basis. <br />This analytical report must be reproduced in its entirety. <br />Page 24 of 29 <br />� <br />J <br />