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Trust our People.Trust our Date. Billings,MT 800.735,4489•Casper,WY 888.235.0515 <br /> w.C®�y wwenergylab con, f 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 /> ' MAJOR IONS <br /> Alkalinity,Total as CaCO3 245 mg/L 5 A2320 B 07/17/21 13:54/dmb <br /> Bicarbonate as HCO3 298 mg/L 5 A2320 B 07/17/21 13:54/dmb <br /> ' Chloride 14 mg/L 1 E300.0 07/20/21 22:30/dmb <br /> Fluoride 0.3 mg/L 0.1 A4500-F C 07/23/21 13:15/dmb <br /> Sulfate 37 mg/L 1 E300.0 07/20/21 22:30!dmb <br /> Calcium 87 mg/L 1 E200.7 07/19/21 16:28/meh <br /> Magnesium 9 mg/L 1 E200.7 07/19/21 16:28/meh <br /> Potassium 1 mg/L 1 E200.7 07/19/21 16:28/meh <br /> Sodium 19 mg/L 1 E200.7 07/19/21 16:28/meh <br /> ' INORGANICS <br /> Sulfide 1 mg/L 1 A4500-S F 07/16/21 14:42/hat <br /> Sulfide as Hydrogen Sulfide(H2S) 1 mg/L 1 A4500-S F 07/16/21 14:42/hat <br /> PHYSICAL PROPERTIES <br /> pH 7.6 s.u. H 0.1 A4500-H B 07/16/21 16:41 /pla <br /> pH Measurement Temp 17.8 °C A4500-H B 07/16/21 16:41 /pla <br /> ' Solids,Total Dissolved TDS @ 180 C 336 mg/L 10 A2540 C 07/19/21 09:25/kjp <br /> Solids,Total Suspended TSS @ 105 C 4 mg/L 1 A2540 D 07/16/21 15:04/kjp <br /> NUTRIENTS <br /> Nitrogen, Nitrate as N 0.19 mg/L 0.01 E353.2 07/23/21 15:31 /tlf <br /> Nitrogen, Nitrite as N ND mg/L H 0.01 A4500-NO2 B 07/16/21 18:45/dmb <br /> Nitrogen, Nitrate+Nitrite as N 0.19 mg/L 0.01 E353.2 07/19/21 15:07/dmb <br /> Phosphorus,Total as P 0.074 mg/L 0.005 E365.1 07/20/21 11:45/dmb <br /> ' -H-sample was analyzed beyond recommended hold time due to receiving it with insufficient hold time remaining. <br /> METALS, DISSOLVED <br /> Arsenic 0.005 mg/L 0.001 E200.8 07/20/21 16:38/jcg <br /> Barium 0.10 mg/L 0.05 E200.7 07/19/21 16:28/meh <br /> Beryllium ND mg/L 0.001 E200.7 07/19/21 16:28/meh <br /> Boron ND mg/L 0.05 E200.7 07/19/21 16:28/meh <br /> ' Cadmium ND mg/L 0.001 E200.8 07/20/21 16:38/jcg <br /> Chromium ND mg/L 0.005 E200.8 07/20/21 16:38/jcg <br /> Lead ND mg/L 0.001 E200.8 07/20/21 16:38/jcg <br /> Manganese ND mg/L 0.001 E200.8 07/20/21 16:38/jcg <br /> ' Molybdenum ND mg/L 0.001 E200.8 07/20/21 16:38/jcg <br /> Nickel ND mg/L 0.005 E200.8 07/20/21 16:38/jcg <br /> Selenium 0.002 mg/L 0.001 E200.8 07/21/21 16:57/meh <br /> ' Uranium 0.0011 mg/L D 0.0005 E200.8 07/26/21 12:51 /srm <br /> Vanadium ND mg/L 0.01 E200.8 07/20/21 16:38/jcg <br /> Zinc ND mg/L 0.01 E200.8 07/20/21 16:38/jcg <br /> 1 <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 /> D-Reporting Limit(RL)increased due to sample matrix H-Analysis performed past the method holding time <br /> Page 3 of 31 <br />