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ENERGY <br />/ O1 I VI-il <br />Client: Cotter Corporation <br />Project: Schwartz SW 7 -12 -12 S26517 <br />Analyte Count <br />Method: E903.0 <br />Sample ID: C12070481 -001 EMS <br />Radium 226 <br />Sample ID: MB -RA226 -6123 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Method: E903.0 <br />Sample ID: 012070273- 004AMS <br />Radium 226 <br />www.energylab.com <br />Aulffic l Ese1.ncs Since 1152 <br />Result Units <br />Sample Matrix Spike <br />14 pCi /L <br />Sample ID: C12070481- 001EMSD Sample Matrix Spike Duplicate <br />Radium 226 15 pCi /L <br />3 Method Blank <br />-0.06 <br />0.09 <br />0.2 <br />Sample ID: LCS -RA226 -6123 Laboratory Control Sample <br />Radium 226 6 6 pCi /L <br />Sample Matrix Spike <br />13 pCi /L <br />Sample ID: C12070273- 012ADUP 3 Sample Duplicate <br />Radium 226 0.15 <br />Radium 226 precision ( ±) 0.13 <br />Radium 226 MDC 0.19 <br />- The Sample and the Duplicate are both below the MDC, the RPD is acceptable. <br />Sample ID: MB -RA226 -6108 3 Method Blank <br />Radium 226 1 <br />Radium 226 precision ( ±) 0.2 <br />Radium 226 MDC 0.2 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />Helena, MT 817- 472 -0711 • Billings, MT 800 735 - 4489 • Casper, WY 888 235 - 0515 <br />Gillette, WY 866 - 686 - 7175 • Rapid City, SO 088 - 672 - 1225 • College Station, TX 888 690 - 2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />pCi/L <br />pCi /L <br />pCi /L <br />pCi /L <br />pCi /L <br />pCi /L <br />pCi /L <br />pCi /L <br />pCi /L <br />Report Date: 08/22/12 <br />Work Order: C12070481 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Run: BERTHOLD 770- 1_120723B <br />96 70 130 <br />Run: BERTHOLD 770- 1_120723B <br />107 70 130 9.9 <br />Run: BERTHOLD 770- 1_120723B <br />Run: BERTHOLD 770- 1_120723B <br />105 80 120 <br />Run: BERTHOLD 770- 2_120718B <br />106 70 130 <br />Run: BERTHOLD 770- 2_120718B <br />Run: BERTHOLD 770- 2_120718B <br />ND - Not detected at the reporting limit. <br />R - RPD exceeds advisory limit. <br />Batch: RA226 -6123 <br />07/30/12 10:46 <br />07/30/12 10:46 <br />24 9 <br />07/30/12 12:49 <br />U <br />07/30/12 12:49 <br />Batch: RA226 -6108 <br />07/30/12 09:25 <br />Page 21 of 25 <br />07/30/12 09:25 <br />610 204.1 UR <br />07/30/12 12:50 <br />- The MB is outside of the acceptance range for this analysis due to its proximity to a high activity sample. Any potential effects from this appear to be limited to the MB only. <br />This batch is approved <br />Sample ID: LCS -RA226 -6108 Laboratory Control Sample Run: BERTHOLD 770- 2_120718B <br />Radium 226 7.2 pCi /L 95 80 120 <br />07/30/12 12:50 <br />