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• E Trust our People Trust our Data Billings,MT 406.252.6325•Casper.wy 307.235.0515 <br /> F• Gillette,wy 307.686.7175•Helena,Ml 406.442.0711 <br /> QA/QC Summary Report <br /> Prepared by Casper,WY Branch <br /> Client: Energy Fuels Resources(USA)Inc Work Order: C23070846 Report Date: 08/28/23 <br /> Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Method: RA-05 Batch RA228-7171 <br /> Lab ID: LCS-228-RA226-10978 3 Laboratory Control Sample Run:TENNELEC-4_230816A 08/22/23 13:30 <br /> Radium 228 6.1 pCi/L 90 70 130 <br /> Radium 228 precision(±) 1.4 pCi/L <br /> Radium 228 MDC 0.89 pCdL <br /> Lab ID: MB-RA226-10978 3 Method Blank Run:TENNELEC-4_230816A 08/22/23 13:30 <br /> Radium 228 0.5 pCi/L U <br /> Radium 228 precision(±) 0.6 pCi/L <br /> Radium 228 MDC 0.9 pCi/L <br /> Lab ID: C23070729-001GDUP 3 Sample Duplicate Run-TENNELEC-4_230816A 08/22/23 13:30 <br /> Radium 228 3.1 pCi/L 25 30 <br /> Radium 228 precision(±) 085 pCdL <br /> Radium 228 MDC 0.84 pCi/L <br /> The RER result is 0 60 <br /> Qualifiers: <br /> RL-Analyte Reporting Limit ND-Not detected at the Reporting Limit(RL) <br /> U-Not detected at Minimum Detectable Concentration(MDC) <br /> Page 34 of 36 <br />