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www.ene Ulab.com I Helena, MT 877- 472 -0711 • Billings, MT 800 -735 -4469 + gasper, WY 888- 235 -0515 <br />Aaayllc Gillette, W <br />ExeshmUwe IOU Y 866 -666 -7175 • Rapid City, SO 886 -672 -1225 • College Station, TX 808 - 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 05/01/13 <br />Project: Schwartz SW 4/03/13 S26860 Work Order: C13040198 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226 -6582 <br />Sample ID: C13040142- 001DMS Sample Matrix Spike Run: BERTHOLD 770- 1_130405A 04/15/13 09:01 <br />Radium 226 21 pCi /L 92 70 130 <br />Sample ID: C13040142- 001DMSD Sample Matrix Spike Duplicate <br />Radium 226 21 pCi /L <br />Sample ID: MB- RA226 -6582 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS -RA226 -6582 <br />Radium 226 <br />3 Method Blank <br />-0.06 pCi /L <br />0.09 pCi /L <br />0.2 pCi /L <br />Laboratory Control Sample <br />11 pCi /L <br />Run: BERTHOLD 770-1130405A 04/15/13 09:01 <br />94 70 130 1.3 21.6 <br />Run: BERTHOLD 770- 1_130405A 04/15/13 12:07 <br />U <br />Run: BERTHOLD 770-1130405A 04/15/13 12:07 <br />93 80 120 <br />Method: E903.0 Batch: RA226 -6581 <br />Sample ID: C13040085- 001AMS Sample Matrix Spike Run: BERTHOLD 770- 1_130405B 04/19/13 11:51 <br />Radium 226 39 pCi /L 103 70 130 <br />Sample ID: C13040085- 001AMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770- 1_130405B 04/19/13 11:51 <br />Radium 226 18 pCi /L 80 70 130 73 23.4 R <br />- The RPD for the MSD is high. The individual spike recoveries are within range, the MB is acceptable, and the LCS is acceptable therefore the batch is approved <br />Sample ID: MB -RA226 -6581 3 Method Blank Run: BERTHOLD 770- 1_130405B 04/19/13 15:48 <br />Radium 226 -0.2 pCi /L U <br />Radium 226 precision ( ±) 0.2 pCi /L <br />Radium 226 MDC 0.4 pCi /L <br />Sample ID: LCS -RA226 -6581 Laboratory Control Sample Run: BERTHOLD 770- 1_130405B 04/19/13 15.48 <br />Radium 226 9.4 pCi /L 84 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />R - RPD exceeds advisory limit. <br />Page 21 of 25 <br />