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wwwinergylab com <br />w4aatFsaf..a7t?lt <br />11 • Billings, MIT 800-135-4489• Casper, WY 888-235-1515 <br />9 city, so sBOB472-1225 • College Station, TX 888-6!0-2218 <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: RA-05 <br />Sample ID: LCS-228-RA226-5063 Laboratory Control Sample <br />Radium 228 7.4 pCi/L <br />Sample ID: MB-RA226-5063 3 Method Blank <br />Radium 228 0.6 pCi/L <br />Radium 228 precision (±) 0.6 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: 010120395-001HMS Sample Matrix Spike <br />Radium 228 15 pCi/L <br />Sample ID: 010120395-001HMSD Sample Matrix Spike Duplicate <br />Radium 228 15 pCi/L <br />Report Date: 12/28/10 <br />Work Order: C10110835 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228-3530 <br />Run: TENNELEC-3_101216A 12/21/10 13:59 <br />95 70 130 <br />Run: TENNELEC-3_101216A 12/21/10 13:59 <br />U <br />Run: TENNELEC-3_101216A 12/21/10 13:59 <br />98 70 130 <br />Run: TENNELEC-3_101216A 12/21/10 13:59 <br />100 70 130 1.9 31.8 <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 19 of 23 <br />