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Trust our People Trust our Data Billings,MT 406.252.6325•Casper WY 307.235.0515 <br /> E Gillette,WY 307.686.7175•Helena,MT 406.442.0711 <br /> QA/QC Summary Report <br /> Prepared by Casper,WY Branch <br /> Client: Energy Fuels Resources(USA) Inc Work Order: C23081241 Report Date: 09/21/23 <br /> Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Method: RA-05 Batch.RA228-7187 <br /> Lab ID: LCS-228-RA226-11025 3 Laboratory Control Sample Run:TENNELEC-4_230901C 09/12/23 13.28 <br /> Radium 228 8.0 pCi/L 119 70 130 <br /> Radium 228 precision(±) 16 pCi/L <br /> Radium 228 MDC 0.84 pCi/L <br /> Lab ID: MB-RA226-11025 3 Method Blank Run-TENNELEC-4 230901C 09/12/23 13 28 <br /> Radium 228 0.7 pCi/L U <br /> Radium 228 precision(±) 05 pCi/L <br /> Radium 228 MDC 0.8 pCi/L <br /> Lab ID: C23081241-001FDUP 3 Sample Duplicate Run:TENNELEC-4_230901C 09/12/23 13 28 <br /> Radium 228 1.3 pCi/L 2.6 30 <br /> Radium 228 precision(±) 059 pCi/L <br /> Radium 228 MDC 0.81 pCi/L <br /> The RER result is 0 04 <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 18 of 20 <br />