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ENERGY <br />Client: Cotter Corporation <br />Project: Schwartz SW 4/5/12 S26451- S26458 <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -5929 <br />Radium 228 <br />Sample ID: MB -RA226 -5929 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Sample ID: C12040315- 001AMS <br />Radium 228 <br />Sample ID: C12040315- 001AMSD <br />Radium 228 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />www.energy1ab.com <br />Aosiflical fxetheoc. Rau 1552 <br />Laboratory Control Sample <br />8.7 pCi /L <br />3 Method Blank <br />1.4 <br />0.68 <br />0.64 <br />pCi /L <br />pCi /L <br />pCi /L <br />Sample Matrix Spike <br />15 pCi /L <br />Sample Matrix Spike Duplicate <br />17 pCi /L <br />Helene, MT 877- 472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888 - 235 -0515 <br />Gillette, WY 866 -686 -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 />Analyte <br />Count Result Units <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Run: TENNELEC- 3_120410A <br />119 80 120 <br />Run: TENNELEC- 3_120410A <br />Run: TENNELEC- 3120410A <br />102 70 130 <br />Run: TENNELEC-3_120410A <br />113 70 130 9.8 <br />ND - Not detected at the reporting limit. <br />Report Date: 05/11/12 <br />Work Order: C12040313 <br />Page 32 of 42 <br />Batch: RA228 -4065 <br />04/17/12 09:06 <br />04/17/12 09:06 <br />04/17/12 09:06 <br />04/17/12 09:06 <br />34.1 <br />