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ENERGY <br />�r��ic7�n C,Ftl' �. <br />IV <br />Client: Cotter Corporation <br />Method: E903.0 <br />Sample ID: LCS -RA226 -5774 <br />Radium 226 <br />Sample ID: MB- RA226 -5774 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />www.enefulab.com <br />Asstittal EnigxrraSllra 1132 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Project: Schwartz GW 12/30/11 S26173 Work Order: C12010004 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />Laboratory Control Sample <br />6.0 pCi /L <br />3 Method Blank <br />0.1 pCi /L <br />0.2 pCi /L <br />0.3 pCi /L <br />Helena, Mr 877. 472 -0711 • Billings, MT 808- 735 -4488 • Casper, WY 888- 235 -0515 <br />Gillette, WY 866- 686 -7175 • Rapid City, SD 888- 612 -1225 • College Station, TX 888- 690 -2218 <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Report Date: 02/07/12 <br />Run: BERTHOLD 770- 1_120106A <br />93 80 120 <br />Run: BERTHOLD 770- 1_120106A <br />Sample ID: 012010004- 001FMS Sample Matrix Spike Run: BERTHOLD 770- 1_120106A 01/17/12 09:19 <br />Radium 226 350 pCi /L 164 70 130 S <br />- Sample activity for this radionuclide is much larger than the spike activity added Therefore the matrix spike recovery could not be calculated The LCS and the RPD of the <br />MS /MSD pair are acceptable; this batch is approved. <br />Sample ID: 012010004- 001FMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770- 1_120106A 01/17/12 09:19 <br />Radium 226 360 pCi /L 266 70 130 3.7 13.3 S <br />Page 18 of 21 <br />Batch: RA226 -5774 <br />01/17/12 09 19 <br />01/17/12 09'19 <br />U <br />