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: Sequoia <br />AI1alvtical <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />ECMS Project: QBR-DEH Sampled: 10/1/99 <br />P.O. Box 622228 Project Number: N/A Received: 10/6/99 <br />Orangevale, CA 95662 Project Manager: Maureen Dogett Reported: 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 />Batch: 9100140 <br />Date Prepared: 10/13/99 <br />Extraction Method: EPA 7470A <br />Blank <br />9100140-BLKI <br />Mercury <br />10/13/99 <br />ND <br />mg/l 0.000200 <br />LCS <br />9100140 -BSI <br />Mercury <br />10/13/99 0.00500 <br />0.00458 <br />mg/l 80.0-120 91.6 <br />Matrix Spike <br />9100140 -MSI S910148-01 <br />Mercury <br />10/13/99 0.00500 ND <br />0.00471 <br />mg/l 75.0-125 94.2 <br />Matrix Spike Dup <br />9100140-MSDI S910148-01 <br />Mercury <br />10/13/99 0.00500 ND <br />0.00476 <br />mg/l 75.0-125 95.2 20.0 1.06 <br />Batch: 9100141 <br />Date Prepared: 10/13/99 <br />Extraction Method: EPA 7471A <br />Blank <br />9100141-BLKI <br />Mercury <br />10/13/99 <br />ND <br />mg/kg 0.0200 <br />LCS <br />9100141-BS1 <br />Mercury <br />10/13/99 0.417 <br />0.433 <br />mg/kg 80.0-120 104 <br />Matrix Spike <br />9100141 -MSI S910073-01 <br />Mercury <br />10/13/99 0.417 0.0475 <br />0.383 <br />mg/kg 75.0-125 80.5 <br />Matrix Spike Dup <br />9100141-MSDI S910073-01 <br />Mercury <br />10/13/99 0.417 0.0475 <br />0.394 <br />mg/kg 75.0-125 83.1 20.0 3.18 <br />Batch: 9100150 <br />Date Prepared: 10/13/99 <br />Extraction Method: EPA 3010A <br />Blank <br />9100150-BLKI <br />Antimony <br />10/13/99 <br />ND <br />mg/1 0.0500 <br />Arsenic <br />ND <br />0.0500 <br />Barium <br />ND <br />0.0500 <br />Beryllium <br />ND <br />0.00500 <br />Cadmium <br />ND <br />0.00500 <br />Chromium <br />ND <br />0.00500 <br />Cobalt <br />ND <br />0.0200 <br />Copper <br />ND <br />0.00500 <br />Lead <br />ND <br />0.0500 <br />Molybdenum <br />ND <br />0.0200 <br />Nickel <br />, <br />ND <br />0.0200 <br />Selenium <br />ND <br />0.0500 <br />Silver <br />ND <br />0.00500 <br />Thallium <br />ND <br />0.0500 <br />Sequoia Analytical - Sacramento <br />*Refer to end of report for text of notes and definitions. <br />Page 6 of 9 <br />