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wrw.enalylsb rn r Helask Ur 877472-0711 • Billings, W /11-735-44N • Casper, WV 11!-231-111115 <br />AadtlralEtttaraar am I!f ) 6illetb, Wt' 01.511-7175 • Rapid C ft 50111-172-1225 • Gap station, iX 1111-Bt11l I <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine <br />Report Date: 10/12/10 <br />Work Order: C10090382 <br />Anatyte Count Result Units RL %REC Low Limit High Limit RPD RPOLImit Qual <br />Method: E903.0 Dawn. roacco do i <br />Sample ID: C10o90382.001FMS Sample Matrix Spike Run: BERTHOLD 770-2_100920C 10/05/10 11:41 <br />Radium 226 17 pCi/L 110 70 130 <br />Sample ID: C1oo903e2-001FMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-2_100920C 10/05/10 14:13 <br />Radium 226 18 pCi/L 119 70 130 6.8 24.9 <br />Sample ID: MB-RA2264811 3 Method Blank Run: BERTHOLD 770-2100920C 10/05/1014:13 <br />Radium 226 0.1 pCi/L U <br />Radium 226 precision (t) 0.1 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA2264811 Laboratory Control Sample Run: BERTHOLD 770-2_100920C 10/05/10 14:13 <br />Radium 226 8.5 pCi/L 105 70 130 <br />Method: E903.0 <br />Sample ID: C70090386.005CMS Sample Matrix Spike <br />Radium 226 20.5 pCi/L <br />Sample ID: C10090386.005CMSO Sample Matrix Spike Duplicate <br />Radium 226 18.9 pCi/L <br />Sample ID: LCS-RA226.4794 Laboratory Control Sample <br />Radium 226 9.6 pCi/L <br />Sample ID: MB-RA226.4794 3 Method Blank <br />Radium 226 0.007 pCi/L <br />Radium 226 precision (±) 0.10 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Qualifiers: <br />RL - Anatyte reporting limit <br />MDC - Minimum detectable concentration <br /> Batch: RA226-4794 <br />Run: G542M_100914A 09/20/10 21:55 <br />87 70 130 <br />Run: G542M_100914A 09/20/10 21:55 <br />80 70 130 8.1 21.5 <br />Run: G542M_100914A 09/20/10 21:56 <br />93 70 130 <br />Run: G542M_100914A 09/20/10 21:56 <br /> U <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 27 of 36