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www.eiwgylab.com Helena, MT 877 -472 -0711 * Billings, W 800 -735 -4489 - Casper, WY 888 -235 -0515 <br />- AadytlealEnallamSku Im � Gillette, WY 866 -686 -7175 - Rapid City, SD 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 5/4/13 S26868 S26869 <br />Analyte Count Result <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -6631 Laboratory C< <br />Radium 228 8.9 <br />Sample ID: MB -RA226 -6631 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Report Date: 05/29/13 <br />Work Order: C13050235 <br />Units RL ° /6REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228 -4414 <br />mtrol Sample Run: TENNELEC- 3_130509B 05/17/13 20:20 <br />pCi /L 98 80 120 <br />3 Method Blank <br />-0.5 pCi /L <br />0.6 pCi /L <br />1.0 pCi /L <br />Run: TENNELEC- 3_130509B 05/17/13 20:20 <br />U <br />Sample ID: C13050243- 002AMS Sample Matrix Spike Run: TENNELEC- 3_130509B 05/17/13 20:21 <br />Radium 228 21.0 pCi /L 105 70 130 <br />Sample ID: 013050243- 002AMSD Sample Matrix Spike Duplicate Run: TENNELEC- 3_130509B 05/17/13 20:21 <br />Radium 228 31.5 pCi /L 96 70 130 40 32.1 R <br />- The RPD for the MSD is high The individual spike recoveries are within range, the MB is acceptable, and the LCS is acceptable therefore the batch is approved. <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />R - RPD exceeds advisory limit. <br />Page 25 of 29 <br />