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�■ • ®' Trust our People.Trust our Data. Billings,MT 800.735 4489•CasDer,WY 888.235.0515 <br /> t° Gillette,WY 888.886.7175•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 09:50 <br /> Lab ID: C21070652-004 DateReceived: 07/16/21 <br /> Client Sample ID: PR Spring Matrix: Aqueous <br /> ——— — MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date/By <br /> RADIONUCLIDES,TOTAL <br /> Radium 226 4.0 pCi/L E903.0 08/02/21 09:23/trs <br /> Radium 226 precision(t) 0.8 pCi/L E903.0 08/02/21 09:23/trs <br /> ' Radium 226 MDC 0.2 pCi/L E903.0 08/02/21 09:23/trs <br /> Radium 228 -0.06 pCi/L U RA-05 07/27/21 13:15/trs <br /> Radium 228 precision(t) 0.6 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 3.9 pCi/L A7500-RA 08/02/21 13:44/dmf <br /> Radium 226+Radium 228 precision(t) 1.1 pCi/L A7500-RA 08/02/21 13:44/dmf <br /> Radium 226+Radium 228 MDC 1.1 pCi/L A7500-RA 08/02/21 13:44/dmf <br /> DATA QUALITY <br /> Solids,Total Dissolved-Calculated 508 mg/L 1.00 A1030 E 07/21/21 09:58/jlw <br /> A/C Balance -1.11 % A1030 E 07/21/21 09:58/jlw <br /> Anions 8.95 meq/L A1030 E 07/21/21 09:58/jlw <br /> Cations 8.75 meq/L A1030 E 07/21/21 09:58/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 10 of 31 <br />