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.819 Striker Avenue. Suite 8 <br />SekiuoiaSacramento, CA 95834 <br />(916)921-9600 <br />FAX (916) 921-0100 <br />Analytical <br />® wwv .sequoialabs.com <br />Kleinfelder - Stockton Project: Granite Bumpile <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 />Analvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 1080056 - EPA 3050B <br />Matrix Spike Dup (1080056-MSDI) <br />Source: S107384-10 <br />Prepared: 08/06/01 Analyzed: 08/08/01 <br />Arsenic <br />50.3 <br />10 mg/kg <br />50.0 <br />ND <br />101 <br />80-120 <br />0.199 <br />20 <br />Cadmium <br />47.8 <br />1.0 <br />50.0 <br />ND <br />95.6 <br />,80-120 <br />0.00 <br />20 <br />Chromium <br />54.2 <br />1.0 <br />50.0 <br />6.2 <br />96.0 <br />80-120 <br />0.185 <br />20 <br />Nickel <br />59.3 <br />4.0 <br />- 50.0 <br />8.1 <br />102 <br />80-120 <br />1.36 <br />20 <br />Zinc <br />79.4 <br />1.0 <br />50.0 <br />31 <br />96.8 <br />80-120 <br />1.78 <br />20 <br />Batch 1080142 - EPA 7471A <br />Blank (1080142-BLKI) Prepared: 08/13/01 Analyzed: 08/14/01 <br />Mercury ND 0.020 mg/kg <br />LCS (1080142 -BSI) Prepared: 08/13/01 Analyzed: 08/14/01 <br />Mercury 0.383 0.020 mg/kg 0.417 91.8 80-120 <br />Matrix Spike (1080142 -MSI) Source: S108095-02 Prepared: 08/13/01 Analyzed: 08/14/01 <br />Mercury 0.548 0.020 mg/kg 0.417 0.15 95.4 75-125 <br />Matrix Spike Dup (1080142-MSD1) Source: S108095-02 Prepared: 08/13/01 Analyzed: 08/14/01 <br />Mercury 0.526 0.020 mg/kg 0.417 0.15 90.2 75-125 4.10 20 <br />Sequoia Analytical - Sacramento The results in this report appiy, to the smnples anah_ed in accordance with the chain of <br />custody document. This analytical report must be reproduced in its entirety. <br />T. <br />Pa(e 13 of 20 <br />