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AOL <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 92 1 -0 100 <br />www.sequoiaiabs.com <br />Kleinfelder - Stockton Project: Granite Bumpile <br />2825 East Mvrtle 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 />Repotting Spike Source %REC RPD <br />Analvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 1080056 - EPA 3050B <br />Blank (1080056-BLK1) <br />Prepared: 08/06/01 Analyzed: 08/08/01 <br />Antimony <br />ND <br />2.5 mg/kg <br />Arsenic <br />ND <br />2.5 " <br />Barium <br />ND <br />2.5 " <br />Beryllium <br />ND <br />0.25 - <br />Cadmium <br />ND <br />0.25 " <br />Chromium <br />ND <br />0.25 " <br />Cobalt <br />ND <br />1.0 " <br />Copper <br />ND <br />0.25 " <br />Lead <br />ND <br />2.5 " <br />Molybdenum <br />ND <br />1.0 " <br />Nickel <br />ND <br />1.0 " <br />Selenium <br />ND <br />2.5 " <br />Silver <br />ND <br />0.25 " <br />Thallium <br />ND <br />2.5 " <br />Vanadium <br />ND <br />1.0 " <br />Zinc <br />ND <br />0.25 " <br />LCS (1080056 -BSI) <br />Prepared: 08/06/01 Analyzed: 08/08/01 _ <br />Arsenic <br />48.0 <br />2.5 mg/kg <br />50.0 96.0 80-120 <br />Cadmium <br />48.8 <br />0.25 <br />50.0 97.6 80-120 <br />Chromium <br />49.9 <br />0.25 <br />50.0 99.8 80-120 <br />Nickel <br />53.0 <br />1.0 <br />50.0 106 80-120 <br />Zinc <br />48.1 <br />0.25 <br />50.0 96.2 80-120 <br />Matrix Spike (1080056 -MSI) <br />Source: S107384-10 <br />Prepared: 08/06/01 Analyzed: 08/08/01 <br />Arsenic <br />50.2 <br />10 mg/kg <br />50.0 ND 100 80-120 <br />Cadmium <br />47.8 <br />1.0 " <br />50.0 ND 95.6 80-120 <br />Chromium <br />54.1 <br />1.0 <br />50.0 6.2 95.8 80-120 <br />Nickel <br />58.5 <br />4.0 <br />50.0 8.1 101 80-120 <br />Zinc <br />78.0 <br />1.0 <br />50.0 31 94.0 80-120 <br />Sequoia Analytical - Sacramento The results in this report apply to the samples analy_ed in accordance with thq chain of <br />custody document. This analvtical report must he reproduced in its entirety <br />4 Paye 12 of 20 <br />=G' <br />