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• www.ertrdab.com Helena, MT 877- 472 -0711 • Billings, MT 600 -735 -4489 • Casper, WY 888 - 235 -0515 <br />A~6an11ssc.Avi 1951 Gillette, WY 866 -686 -1175 • Rapid City, So 888 -672 -1225 • College Station, T%888- 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz SW 5/21/13 S26991 - S26995 <br />Analyte Count Result <br />Units <br />Method: E903.0 <br />Sample ID: C13050834- 001EDUP <br />3 Sample Duplicate <br />Sample ID: 013050841 -001 DMS <br />Sample Matrix Spike <br />Radium 226 <br />29 <br />pCi /L <br />Sample ID: 013050841- 001DMSD <br />Sample Matrix Spike Duplicate <br />Radium 226 <br />32 <br />pCi /L <br />Sample ID: MB -RA226 -6660 <br />3 Method Blank <br />94 <br />Radium 226 <br />-0.06 <br />pCi /L <br />Radium 226 precision ( ±) <br />0.1 <br />pCi /L <br />Radium 226 MDC <br />0.2 <br />pCi /L <br />Sample ID: LCS -RA226 -6660 <br />Laboratory Control Sample <br />Radium 226 <br />12 <br />pCi /L <br />Method: E903.0 <br />Sample ID: C13050834- 001EDUP <br />3 Sample Duplicate <br />Radium 226 <br />22 <br />pCi /L <br />Radium 226 precision ( ±) <br />0.66 <br />pCi /L <br />Radium 226 MDC <br />0.11 <br />pCi /L <br />Sample ID: C13050908- 001CMS <br />Sample Matrix Spike <br />Radium 226 <br />94 <br />pCi /L <br />Sample ID: MB -RA226 -6661 <br />3 Method Blank <br />Radium 226 <br />-0.02 <br />pCi /L <br />Radium 226 precision ( ±) <br />0.07 <br />pCi /L <br />Radium 226 MDC <br />0.1 <br />pCi /L <br />Sample ID: LCS - RA226 -6661 <br />Laboratory Control Sample <br />Radium 226 <br />11 <br />pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 06/27/13 <br />Work Order: C13050860 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226 -6660 <br />Run: BERTHOLD 770- 2_130528C 06/10/13 12:07 <br />115 70 130 <br />Run: BERTHOLD 770- 2_130528C 06/10/13 12.07 <br />128 70 130 9.0 21.1 <br />Run: BERTHOLD 770- 2_130528C 06/10/13 14:03 <br />U <br />Run: BERTHOLD 770- 2_130528C 06/10/13 14:03 <br />105 80 120 <br />Batch: RA226 -6661 <br />Run: BERTHOLD 770- 2_130530A 06/06/13 12:04 <br />3.9 15.9 <br />Run: BERTHOLD 770- 2_130530A 06/06/13 15:59 <br />116 70 130 <br />Run: BERTHOLD 770- 2_130530A 06/06/13 19:08 <br />U <br />Run: BERTHOLD 770- 2_130530A 06/06/13 19:08 <br />98 80 120 <br />ND - Not detected at the reporting limit <br />U - Not detected at minimum detectable concentration <br />Page 24 of 31 <br />