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wwwmArgylab.com <br />AireglWa &MWhaaSMn;IW <br />2-0711 • Billings, MT 8011-135-4419.0 Casper, WY 880-235-1515 <br />Rapid a y 5D 688472-1225 • College Station, TX 888410-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine Monitoring Program-Discharge <br />Analyte Count Result Units <br />Method: E903.0 <br />Sample ID: C10110835-001 FMS Sample Matrix Spike <br />Radium 226 12 pCi/L <br />Sample ID: 010110835-001FMSD Sample Matrix Spike Duplicate <br />Radium 226 15 pCi/L <br />Sample ID: MB-RA226-5063 3 Method Blank <br />Radium 226 0.03 pCi/L <br />Radium 226 precision (±? 0.07 pCi/L <br />Radium 226 MDC 0.1 pCi/L <br />Sample ID: LCS-RA226-5063 Laboratory Control Sample <br />Radium 226 6.0 pCi/L <br />Report Date: 12/28/10 <br />Work Order: C10110835 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226-5063 <br />Run: TENNELEC-3_101216D 12/27/10 10:15 <br />89 70 130 <br />Run: TENNELEC-3_101216D 12/27/10 10:15 <br />107 70 130 17 24.1 <br />Run: TENNELEC-3_101216D 12/27/10 10:15 <br />U <br />Run: TENNELEC-3_101216D 12/27/10 10:15 <br />96 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 17 of 23