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.. <br />Helena, MT B77-472-0711 • Billings, MT 890-735-44B9 • Casper, wY 888-235-0515 <br />www.energylab.com <br />¦ ` i1,r,0cx/ExcaBeecesinew 1852 f Gillette, wy 866-686-7115 Rapid City, SD 888-672-1225 • College Station, TX 688-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine - <br />Annlvtra Count Result Units <br />Report Date: 01 /19/11 <br />Work Order: C10120711 <br />RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />I. oAnnc_Ar)An <br />Method: E903.0 <br />Sample ID: C10120711-001 FMS Sample Matrix Spike <br />Radium 226 12 pCi/L <br />Sample ID: C10120711-001FMSD Sample Matrix Spike Duplicate <br />Radium 226 11 pCi/L <br />Sample ID: MB-RA226-5080 3 Method Blank <br />Radium 226 -0.05 pCi/L <br />Radium 226 precision (±) 0.07 pCi/L <br />Radium 226 MDC 0.1 pCi/L <br />Sample ID: LCS-RA226-5080 Laboratory Control Sample <br />Radium 226 5.4 pCi/L <br />Run: BERTHOLD 770-1_101222A <br />91 70 130 <br />Run: BERTHOLD 770-1_101222A <br />78 70 130 14 <br />Run: BERTHOLD 770-1_101222A <br />Run: BERTHOLD 770-1_101222A <br />86 70 130 <br />01/03/11 10:40 <br />01/03/11 10:40 <br />25.8 <br />01/03/11 10:40 <br />U <br />01/03/11 10:40 <br />Qualifiers: <br />RL - Analyte reporting limit. ND -Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />MDC - Minimum detectable concentration <br />Page 17 of 23