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819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916)921-9600 <br />FAX (916) 921-0100 <br />www.sequoialabs.com <br />Kleinfelder - Stockton Project: Granite Burnpile <br />2825 East Myrtle Street Project Number: 20-1108-33 Reported: <br />Stockton CA, 95205 Project Manager: Doug Heard 08/15/01 17:24 <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 Units Level Result %REC Limits RPD Limit Notes <br />Batch 1080056 - EPA 3050B <br />Blank (1080056 _BLK1) <br />Prepared: 08/06/01 <br />Analyzed: 08/08/01 <br />Antimony <br />ND <br />2.5 <br />mg/kg <br />Arsenic <br />ND <br />2.5 <br />" <br />Barium <br />ND <br />2.5 <br />" <br />Beryllium <br />ND <br />0.25 <br />" <br />Cadmium <br />ND <br />0.25 <br />" <br />Chromium <br />ND <br />0.25 <br />" <br />Cobalt <br />ND <br />1.0 <br />" <br />Copper <br />ND <br />0.25 <br />" <br />Lead <br />ND <br />2.5 <br />" <br />Molybdenum <br />ND <br />1.0 <br />" <br />Nickel <br />ND <br />1.0 <br />" <br />Selenium <br />ND <br />2.5 <br />" <br />Silver <br />ND <br />0.25 <br />" <br />Thallium <br />ND <br />2.5 <br />" <br />Vanadium <br />ND <br />1.0 <br />" <br />Zinc <br />ND <br />0.25 <br />" <br />LCS (108005. 6 -BSI) <br />Prepared: 08/06/01 <br />.Analyzed: 08/08/01 <br />_ _ _ <br />Arsenic <br />48.0 <br />2.5 <br />mg/kg <br />50.0 <br />96.0 80-120 <br />Cadmium <br />48.8 <br />0.25 <br />50.0 <br />97.6 80-120 <br />Chromium <br />49.9 <br />0.25 <br />50.0 <br />99.8 80-120 <br />Nickel <br />53.0 <br />1.0 <br />50.0 <br />106 80-120 <br />Zinc <br />48.1 <br />0.25 <br />50.0 <br />96.2 80-120 <br />Matrix Spike (108005.6 -MSI) <br />Source: 5107384-10 <br />Prepared: 08/06/01 <br />Analyzed: 08/08/01 <br />_ <br />Arsenic <br />50.2 <br />10 <br />mg/kg <br />50.0 ND <br />100 80-120 <br />Cadmium <br />47.8 <br />1.0 <br />50.0 ND <br />95.6 80-120 <br />Chromium <br />54.1 <br />1.0 <br />50.0 6.2 <br />95.8 80-120 <br />Nickel <br />58.5 <br />4.0 <br />50.0 8.1 <br />101 80-120 <br />Zinc <br />78.0 <br />1.0 <br />50.0 31 <br />94.0 80-120 <br />Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document. This analytical report must be reproduced in its entirety. <br />Page 12 of 20 <br />