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Analvtical <br />s:,, <br />Sequoia <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />ECMS <br />Project: <br />QBR-DEH <br />Sampled: <br />10/1/99 <br />P.O. Box 622228 <br />Project Number: <br />N/A <br />Received: - <br />10/6/99 <br />Orangevale, CA 95662 <br />Project Manager: <br />Maureen Dogett <br />Reported: <br />10/14/99 <br />Total Metals by EPA 6000/7000 Series Methods/Quality Control <br />Sequoia Analytical - Sacramento <br />Date Spike Sample QC Reporting Limit Recov. RPD RPD <br />Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br />Matrix Spike (continued) <br />9100150 -MSI <br />S910156-05 <br />Chromium <br />10/13/99 0.500 <br />0.00645 <br />0.481 mg/l <br />80.0-120 <br />94.9 <br />Nickel <br />0.500 <br />ND <br />0.476 <br />80.0-120 <br />95.2 <br />Zinc <br />0.500 <br />0.0298 <br />0.513 <br />80.0-120 <br />96.6 <br />Matrix Spike Dup <br />9100150-MSDI <br />S910156-05 <br />Arsenic <br />10/13/99 0.500 <br />ND <br />0.486 mg/I <br />80.0-120 <br />97.2 <br />20.0 <br />1.24 <br />Cadmium <br />0.500 <br />ND <br />0.482 <br />80.0-120 <br />96.4 <br />20.0 <br />0.416 <br />Chromium <br />0.500 <br />0.00645 <br />0.488 <br />80.0-120 <br />96.3 <br />20.0 <br />1.46 <br />Nickel <br />0.500 <br />ND <br />0.483 <br />80.0-120 <br />96.6 <br />20.0 <br />1.46 <br />Zinc <br />0.500 <br />0.0298 <br />0.535 <br />80.0-120 <br />101 <br />20.0 <br />4.45 <br />r <br />Sequoia Analytical - Sacramento *Refer to end of report for text of notes and definitions. <br />Page 5 of 7 <br />