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www eW#ab.com Helena, W 877.472 -0711 • Billings, W 800- 735 -4489 a Casper, WY 888- 235 -0515 <br />AaWcWhesism Sk 1 ie3! Gillette, WY 866 -686 -7175 • Rapid City, SD 888- 672 -1225 a College Station, TX 888- 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Report Date: 05/01/13 <br />Project: Schwartz SW 4/03/13 S26860 <br />Work <br />Order: C13040198 <br />Analyte Count Result Units <br />RL %REC Low Limit High Limit <br />RPD RPDLimit Qual <br />Method: RA -05 <br />Batch: RA228 -4379 <br />Sample ID: LCS- 228 -RA226 -6581 <br />Laboratory Control Sample <br />Run: G5000W_130405A <br />04/14/13 12:17 <br />Radium 228 <br />7.0 pCi /L <br />86 80 120 <br />Sample ID: MB -RA226 -6581 <br />3 Method Blank <br />Run: G5000W_130405A <br />04/14/13 12:17 <br />Radium 228 <br />0.1 pCi /L <br />U <br />Radium 228 precision ( ±) <br />3 pCi /L <br />Radium 228 MDC <br />4 pCi /L <br />Sample ID: C13040198 -001 HMS <br />Sample Matrix Spike <br />Run: G5000W_130405A <br />04/14/13 12:17 <br />Radium 228 <br />20 pCi /L <br />117 70 130 <br />Sample ID: C13040198 -001 HMSD <br />Sample Matrix Spike Duplicate <br />Run: G5000W_130405A <br />04/14/13 12:17 <br />Radium 228 <br />20 pCi /L <br />112 70 130 <br />3.8 38.8 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 22 of 25 <br />