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wwiwmeW&b.com <br />AUWdEmllra2W1W <br />Client: Cotter Corporation <br />Project: Schwartz SW 01 -11 -11 S25440-S25447 <br />Analyte Count Result <br />Method: RA-05 <br />Sample ID: LCS-228-RA226-5137 Laboratory Con <br />Radium 228 7.82 <br />Sample ID: MB-RA226-5137 <br />Radium 228 <br />Radium 228 precision (±) <br />Radium 228 MDC <br />Sample ID: C11010482-002GMS <br />Radium 228 <br />0711 Is, 81llings, MT 900-115-4489'-s Casper, NY 888-235-1515 <br />apid Orly, SD 888-172-1225 • College Station, A 88/-610-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Report Date: 02/11 /11 <br />Work Order: C11010459 <br />Units RL %REC Low Limit High Limit RPD RPDLImit Qual <br />Batch: RA228-3571 <br />trol Sample Run: TENNELEC-3_110124D 01/31/11 11:58 <br />pCi/L 109 70 130 <br />3 Method Blank <br />0.08 pCi/L <br />0.7 pCi/L <br />1 pCi/L <br />Sample Matrix Spike <br />16.4 pCi/L <br />Sample ID: C11010482-002GMSD Sample Matrix Spike Duplicate <br />Radium 228 16.7 pCi/L <br />Run: TENNELEC-3_110124D 01/31/11 11:58 <br />U <br />Run: TENNELEC-3 110124D 01/31/11 11:58 <br />96 70 130 <br />Run: TENNELEC-3_110124D 01/31/11 11:58 <br />97 70 130 2.0 35.4 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration U - Not detected at minimum detectable concentration <br />Page 27 of 38 <br />