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Trust our People.Trust our Data. � _ Billings,MT 800.735.4488•Casper,WY 888.235.0515 <br /> • Gillette,WY 866.686.7175•Helena,MT 877,472,0711 <br /> LABORATORY ANALYTICAL REPORT <br /> Prepared by Casper, WY Branch <br /> Client: Energy Fuels Resources (USA) Inc Report Date: 08/13/21 <br /> ' Project: Whirlwind Mine-Water Collection Date: 07/13/21 10:50 <br /> Lab ID: C21070652-001 Date Received: 07/16/21 <br /> Client Sample ID: DP Spring Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date/By <br /> RADIONUCLIDES, TOTAL <br /> Radium 226 0.3 pCi/L E903.0 08/02/21 07:40/trs <br /> Radium 226 precision (±) 0.2 pCi/L E903.0 08/02/21 07:40/trs <br /> Radium 226 MDC 0.2 pCi/L E903.0 08/02/21 07:40/trs <br /> Radium 228 0.1 pCi/L U RA-05 07/27/21 13:15/trs <br /> Radium 228 precision (±) 0.7 pCi/L RA-05 07/27/21 13:15/trs <br /> Radium 228 MDC 1.1 pCi/L RA-05 07/27/21 13:15/trs <br /> ' Radium 226+Radium 228 0.4 pCi/L U A7500-RA 08/02/21 13:44/dmf <br /> Radium 226+Radium 228 precision(±) 0.7 pCi/L A7500-RA 08/02/21 13:44/dmf <br /> Radium 226+Radium 228 MDC 1.2 pCi/L A7500-RA 08/02/21 13:44/dmf <br /> DATA QUALITY <br /> Solids,Total Dissolved-Calculated 330 mg/L 1.00 Al030 E 07/21/21 09:57/jlw <br /> A/C Balance -1.21 % A1030 E 07/21/21 09:57/jlw <br /> Anions 6.07 meq/L A1030 E 07/21/21 09:57/jlw <br /> Cations 5.93 meq/L A1030 E 07/21/21 09:57/jlw <br /> Report RL-Analyte Reporting Limit MCL-Maximum Contaminant Level <br /> Definitions: QCL-Quality Control Limit ND-Not detected at the Reporting Limit(RL) <br /> ' U-Not detected at Minimum Detectable Concentration <br /> (MDC) <br /> ' Page 4 of 31 <br />