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www.enerdab.com ( Helena, lilt 877 - 472 -0711 • Billings, MT 800- 735 -4486 • Casper, WY 888 - 235 -0515 <br />"�', r�1 J Gillette, WY 866 -606 -7175 • Rapid City, SD 888 - 672 -1225 • College Station, Tl(888- 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz -GW 9/4/14 S27662 <br />Analyte Count Result Units <br />Method: RA -05 <br />Lab ID: LCS- 228 -RA226 -7359 <br />Laboratory Control Sample <br />Radium 228 <br />8.1 pCi /L <br />Lab ID: MB -RA226 -7359 <br />3 Method Blank <br />Radium 228 <br />0.7 pCi /L <br />Radium 228 precision ( ±) <br />0.8 pCi /L <br />Radium 228 MDC <br />1 pCi /L <br />Lab ID: C14090228- 001EMS <br />Sample Matrix Spike <br />Radium 228 <br />21 pCi /L <br />Lab ID: C14090228- 001EMSD <br />Sample Matrix Spike Duplicate <br />Radium 228 <br />20 pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 09/24/14 <br />Work Order: C14090228 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228 -4760 <br />Run: TENNELEC- 3_140909B 09/16/14 12:04 <br />110 80 120 <br />Run: TENNELEC -3 140909B 09/16/14 12:04 <br />U <br />Run: TENNELEC- 3_140909B 09/16/14 12:04 <br />124 70 130 <br />Run: TENNELEC- 3_140909B 09/16/14 12:04 <br />120 70 130 2.8 31.9 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 11 of 14 <br />