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" wwwene oab.COM Helena, MT 877471 -0711 • Billings, MT 800- 735 -4489 a Casper, WY 888 -235 -0515 <br />} A" "EW8* ' "W Gillette, WY 866 -886 -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 />Client: Cotter Corporation <br />Project: Schwartz SW 9/10/13 S27157 <br />Analyte <br />Count Result Units <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -6843 <br />Laboratory Control Sample <br />Radium 228 <br />8.5 pCi /L <br />Sample ID: MB -RA226 -6843 <br />3 Method Blank <br />Radium 228 <br />0.1 pCi /L <br />Radium 228 precision ( ±) <br />0.7 pCi /L <br />Radium 228 MDC <br />1 pCi /L <br />Sample ID: C13090078- 002EMS <br />Sample Matrix Spike <br />Radium 228 <br />15 pCi /L <br />Sample ID: C13090078- 002EMSD <br />Sample Matrix Spike Duplicate <br />Radium 228 <br />18 pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 10/15/13 <br />Work Order: C13090392 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228 -4508 <br />Run: TENNELEC- 3_130916B 09/19/13 08:16 <br />110 80 120 <br />Run: TENNELEC- 3_130916B 09/19/13 08:16 <br />U <br />Run: TENNELEC- 3_130916B 09/19/13 08:16 <br />94 70 130 <br />Run: TENNELEC- 3_130916B 09/19/13 08-16 <br />114 70 130 20 33.7 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 23 of 26 <br />