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• www.energylab.com Helena, MT 877- 472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />Analytical Excellence since 1952 Gillette, WY 866 - 686 -7175 • Rapid City, SD 888- 672 -1215 • College Station, TX 888- 690 -2118 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: O'Connor Design Inc Report Date: 06/18/12 <br />Project: CM -25 Work Order: C12050462 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 <br />Batch 33625 <br />Sample ID: LCS -33625 <br />Laboratory Control Sample <br />Run BERTHOLD 770 -1 <br />120516C <br />05/30/12 07 24 <br />Radium 226 <br />11 pCi /L <br />91 80 120 <br />Sample ID: C1 20 5046 2- 001AMS <br />Sample Matrix Spike <br />Run: BERTHOLD 770 -1 <br />120516C <br />05/30/12 0724 <br />Radium 226 <br />160 pCi /L <br />70 130 <br />S <br />- Sample activity for this radionuclide is much larger than the spike actfv ty added <br />Therefore the matrix spike recovery could not be calculated <br />The LCS and the RPD of the <br />MS/MSD pair are acceptable, this batch <br />is approved. <br />Sample ID: C12050462- 001AMSD <br />Sample Matrix Spike Duplicate <br />Run BERTHOLD 770 -1 <br />120516C <br />05/30/12 0724 <br />Radium 226 <br />150 pCi /L <br />70 130 <br />6.4 <br />179 S <br />Sample ID: MB -33625 <br />3 Method Blank <br />Run BERTHOLD 770-1120516C <br />05/30112 09 05 <br />Radium 226 <br />-010 pCi /L <br />U <br />Radium 226 precision (t) <br />0.1 pCi /L <br />Radium 226 MDC <br />0.2 pCi /L <br />Qualifiers: <br />L - Analyte reporting limit ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration S - Spike recovery outside of advisory limits <br />U - Not detected at minimum detectable concentration <br />