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ENERGY <br />4 <br />www.dlcrg 1a6.com <br />Aed/Ileal Excaterca Slaw 1152 <br />Client: Cotter Corporation <br />Project: Schwartz SW 08/17/11 S25909- S25916 <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -5571 <br />Radium 228 <br />Sample ID: MB -RA226 -5571 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />3 Method Blank <br />-0.2 pCi /L <br />0.6 pCi /L <br />1 pCi /L <br />Sample ID: 011080597- 003DMS Sample Matrix Spike <br />Helena, MT 877472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />Gillette, WY 868 -688 -7175 • Rapid City, SD 888- 672 -1225 • College Station, TX 888 -690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Laboratory Control Sample <br />6.16 pCi /L <br />Run: TENNELEC -3 110822A <br />97 80 120 <br />Run: TENNELEC -3 110822A <br />Radium 228 13.8 pCi /L 101 70 130 <br />Report Date: 09/29/11 <br />Work Order: C11080832 <br />Analyte <br />Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228 -3856 <br />08/26/11 16:00 <br />08/26/11 16:00 <br />U <br />Run: TENNELEC -3 110822A 08/26/11 16:00 <br />Sample ID: C11080597- 003DMSD Sample Matrix Spike Duplicate Run: TENNELEC- 3_110822A 08/26/11 16:00 <br />Radium 228 13.4 pCi /L 98 70 130 3.1 35.7 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 28 of 39 <br />