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• MNnM.?erg)11811.COrn <br />?- Aaai)fiealFara?wpSiioe? iASt <br />Helena, MT 677472-0711 • Billings, MT 600-7354469 • Casper, WY 888-235-6515 <br />Gillette, WY 866-666-7175 • Rapid City, SD 686-672-1225 • Cdlage Station, TX 866-696-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program (S25247) <br />Analyte <br />Method: E903.0 <br />Sample ID: C10100981-001CMS <br />Radium 226 <br />Sample ID: C10100981-001CMSO <br />Radium 226 <br />Sample ID: LCS-RA226-4958 <br />Radium 226 <br />Sample ID: MB-RA226-4958 <br />Radium 226 <br />Radium 226 precision (±) <br />Radium 226 MDC <br />Count Result Units <br />Sample Matrix Spike <br />18 pCi/L <br />Sample Matrix Spike Duplicate <br />15 pCi/L <br />Laboratory Control Sample <br />8.2 pCi/L <br />3 Method Blank <br />-0.10 pCi/L <br />0.070 pCi/L <br />0.17 pCi/L <br />Report Date: 11 /17/10 <br />Work Order: C10101008 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226-4958 <br />Run: BERTHOLD 770-1 101103A 11/12/10 01:21 <br />112 70 130 <br />Run: BERTHOLD 770-1_101103A 11/12/10 01:21 <br />96 70 130 16 24.4 <br />Run: BERTHOLD 770-1 101103A 11/12/10 03:01 <br />105 70 130 <br />Run: BERTHOLD 770-1101103A 11/12/10 03:01 <br />U <br />Method: E903.0 <br />Sample ID: C10101008-001 FMS <br />Radium 226 <br />Sample ID: C10101008-001 FMSD <br />Radium 226 <br />Sample ID: MB-RA226-4970 <br />Radium 226 <br />Radium 226 precision (±) <br />Radium 226 MDC <br />Sample ID: LCS-RA226-4970 <br />Radium 226 <br />Sample Matrix Spike <br />20 pCi/L <br />Sample Matrix Spike Duplicate <br />20 pCi/L <br />3 Method Blank <br />-0.14 pCi/L <br />0.091 pCi/L <br />0.22 pCi/L <br />Laboratory Control Sample <br />9.0 pCi/L <br />Batch: RA226-4970 <br />Run: BERTHOLD 770-2 101108B 11/16/10 13:47 <br />119 70 130 <br />Run: BERTHOLD 770-2_101108B 11/16/10 13:47 <br />121 70 130 0.9 23.8 <br />Run: BERTHOLD 770-2101108B 11/16/10 15:32 <br />U <br />Run: BERTHOLD 770-2_101108B 11/16/10 15:32 <br />115 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 16 of 23