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www.energylab.mm Helena, W 677-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />;. ? AW"WExeela mSim# 1832 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine <br />Report Date: 09/27/10 <br />Work Order: C10080962 <br />Analyte Count Result Units <br />i RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-4784 <br />Sample ID: C10090202-001DMS Sample Matrix Spike Run: BERTHOLD 770-1 _100909B 09/20/10 12:11 <br />Radium 226 23 pCi/L 110 70 130 <br />Sample ID: C10090202-001DMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-1 _1009096 09/20/10 12:11 <br />Radium 226 22 pCi/L 106 70 130 3.9 21.6 <br />Sample ID: MB-RA226-4784 3 Method Blank Run: BERTHOLD 770-1 _100909B 09/20/10 12:11 <br />Radium 226 -0.10 pCi/L U <br />Radium 226 precision (±) 0.06 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA226-4784 Laboratory Control Sample Run: BERTHOLD 770-1_ 100909B 09/20/10 12:11 <br />Radium 226 10 pCi/L 102 70 130 <br />Method: E903.0 <br />Sample ID: C10080899-002CMS <br />Radium 226 <br />Sample ID: C10080899-002CMSD <br />Radium 226 <br />Sample ID: MB-RA226-4777 <br />Radium 226 <br />Radium 226 precision (±) <br />Radium 226 MDC <br />Sample ID: LCS-RA226-4777 <br />Radium 226 <br />Sample Matrix Spike <br />17 pCi/L <br />Sample Matrix Spike Duplicate <br />16 pCi/L <br />3 Method Blank <br />-0.1 pCi/L <br />0.09 pCi/L <br />0.2 pCi/L <br />Laboratory Control Sample <br />9.9 pCi/L <br />Batch: RA226-4777 <br />Run: BERTHOLD 770-2_100907B 09/20/10 12:11 <br />84 70 130 <br />Run: BERTHOLD 770-2_1009076 09/20/10 12:11 <br />78 70 130 8.2 25.1 <br />Run: BERTHOLD 770-2_1009076 09/20/10 13:45 <br />U <br />Run: BERTHOLD 770-2_1009076 09/20/10 13:45 <br />98 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration U - Not detected at minimum detectable concentration <br />Page 32 of 44