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ENERGY <br />A=3ORATC - )R1 , S <br />Client: Cotter Corporation <br />Project: Schwartz SW 4/14/11 S25710- S25712 <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -5328 <br />Radium 228 <br />Sample ID: MB - RA226 - 5328 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Sample ID: C11040560- 001GMS Sample Matrix Spike <br />Radium 228 9.0 pCi /L <br />Sample ID: 011040560- 001GMSD Sample Matrix Spike Duplicate <br />Radium 228 7.8 pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />www.energ 1ab.com <br />Aaabilcs1EEiAlrsg Sklar 1162 <br />3 Method Blank <br />0.7 <br />1 <br />2 <br />Helena, MT 877 - 472 -0711 • Billings, MT 800. 735 -4488 • Casper, WY 888 -235 -0515 <br />Gillette, WY 868- 888 -7175 • Rapid City, S0 888 -672 -1225 • College Station, 11( 888 -680 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Laboratory Control Sample <br />7.7 pCi /L <br />pCi /L <br />pCi /L <br />pCi /L <br />Run: TENNELEC- 3_110502A <br />102 80 120 <br />Run: TENNELEC- 3_110502A <br />Run: TENNELEC- 3_110502A <br />108 70 130 <br />Run: TENNELEC-3_110502A <br />91 70 130 14 <br />Report Date: 05/18/11 <br />Work Order: C11040527 <br />Analyte <br />Count Result Units <br />RL %REC Low Limit High Limit <br />RPD RPDLimit Qual <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 24 of 30 <br />Batch: RA228 -3689 <br />05/10/11 14:20 <br />05/10/11 14:20 <br />U <br />05/10/11 14:20 <br />05/10/11 14:20 <br />34.6 <br />