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wwwtwgytsb.com � Helena, MT 871472 -0711 - Billings, W 800 - 7354489 - Casper, WY 888- 235 -8515 <br />AaWMEW26M Ska 102 Gillette, WY 866- 606 -7175 - Rapid City, SO 886- 672 -1225 - College Station, TX 888 - 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper WY Branch <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 />Revised Date: 06/18/13 <br />Client: Cotter Corporation <br />Report Date: <br />06/13/13 <br />Project: Schwartz 5/16/13 S26979 <br />Work Order: <br />C13050681 <br />Analyte Count Result Units RL <br />%REC <br />Low Limit High Limit RPD <br />RPDLimit Quay <br />Method: RA -05 <br />Batch: RA228 -4421 <br />Sample ID: LCS- 228 -RA226 -6647 <br />Laboratory Control Sample <br />Run: G542M_130522B <br />05/30/13 18:36 <br />Radium 228 <br />9.3 pCi /L <br />115 <br />80 120 <br />Sample ID: MB -RA226 -6647 3 <br />Method Blank <br />Run: G542M_130522B <br />05/30/13 18:36 <br />Radium 228 <br />0.2 pCi /L <br />U <br />Radium 228 precision ( ±) <br />1 pCi /L <br />Radium 228 MDC <br />2 pCi /L <br />Sample ID: C13050657- 006FMS <br />Sample Matrix Spike <br />Run: G542M_130522B <br />05/30/13 18:36 <br />Radium 228 <br />15 pCi /L <br />93 <br />70 130 <br />Sample ID: C13050657- 006FMSD <br />Sample Matrix Spike Duplicate <br />Run: G5421VI_130522B <br />05/30/13 18:36 <br />Radium 228 <br />19 pCi /L <br />119 <br />70 130 23 <br />38.3 <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 />