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®w Trust our People.Trust our Data. Billings,MT 800.735.4489 a Casper,WY 888.235.0515 <br /> www.energylab.com Gillette,WY 866.686.7175•Helena,MT 877.472.0711 <br /> QA/QC Summary Report <br /> Prepared by Casper, WY Branch <br /> Client: Energy Fuels Resources (USA) Inc Work Order: C22080249 Report Date: 08/31/22 <br /> LAnalyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Method: RA-05 Batch:RA228-6881 <br /> Lab ID: LCS-228-RA226-10578 3 Laboratory Control Sample Run:TENNELEC-4 220805A 08/11/22 14.19 <br /> Radium 228 7.9 pCi/L 103 70 130 <br /> Radium 228 precision(t) 2.0 pCi/L <br /> Radium 228 MDC 1.9 pCi/L <br /> Lab ID: MB-RA226-10578 3 Method Blank Run:TENNELEC-4_220805A 08/11/22 14:19 <br /> Radium 228 -1 pCi/L U <br /> Radium 228 precision(t) 1 pCVL <br /> Radium 228 MDC 2 pCi/L <br /> Lab ID: C22080249-001FDUP 3 Sample Duplicate Run:TENNELEC-4 220805A 08/11/22 14:19 <br /> Radium 228 0.011 pCi/L 200 30 UR <br /> Radium 228 precision(t) 1.2 pCi/L <br /> Radium 228 MDC 2.0 pCi/L <br /> -Duplicate RPD is outside of the acceptance range for this analysis. However,the RER is less than the limit of 3,the RER result is 0.59. <br /> Qualifiers: <br /> RL-Analyte Reporting Limit ND-Not detected at the Reporting Limit(RL) <br /> R-Relative Percent Difference(RPD)exceeds advisory limit U-Not detected at Minimum Detectable Concentration(MDC) <br /> Page 30 of 32 <br />