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' Trust our People.Trust our Data. Billings,MT 800,735.4489•Casper,WY 888.235.0515 <br /> ® Gillette,WY 888.888.7175•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 /> ' MAJOR IONS <br /> Alkalinity,Total as CaCO3 310 mg/L 5 A2320 B 07/17/21 14:16/dmb <br /> Bicarbonate as HCO3 379 mg/L 5 A2320 B 07/17/21 14:16/dmb <br /> ' Chloride 20 mg/L 1 E300.0 07/20/21 23:28/dmb <br /> Fluoride 0.4 mg/L 0.1 A4500-F C 07/23/21 13:39/dmb <br /> Sulfate 103 mg/L 1 E300.0 07/20/21 23:28/dmb <br /> Calcium 31 mg/L 1 E200.7 07/19/21 16:47/meh <br /> ' Magnesium 14 mg/L 1 E200.7 07/19/21 16:47/meh <br /> Potassium 5 mg/L 1 E200.7 07/19/21 16:47/meh <br /> Sodium 136 mg/L 1 E200.7 07/19/21 16A7/meh <br /> INORGANICS <br /> Sulfide 1 mg/L 1 A4500-S F 07/16/21 14:42/hat <br /> Sulfide as Hydrogen Sulfide(1-12S) 1 mg/L 1 A4500-S F 07/16/21 14:42/hat <br /> ' PHYSICAL PROPERTIES <br /> pH 8.1 s.u. H 0.1 A4500-H B 07/16/21 16:50/pla <br /> pH Measurement Temp 18.3 °C A4500-H B 07/16/21 16:50/pla <br /> ' Solids,Total Dissolved TDS @ 180 C 517 mg/L 10 A2540 C 07/19/21 09:26/kjp <br /> Solids,Total Suspended TSS @ 105 C ND mg/L 1 A2540 D 07/16/21 15:04/kjp <br /> NUTRIENTS <br /> ' Nitrogen, Nitrate as N 0.25 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 0.25 mg/L 0.01 E353.2 07/19/21 15:10/dmb <br /> Phosphorus,Total as P 0.078 mg/L 0.005 E365.1 07/20/21 11:48/dmb <br /> ' -H-sample was analyzed beyond recommended hold time due to receiving it with insufficient hold time remaining. <br /> METALS, DISSOLVED <br /> Arsenic 0.322 mg/L 0.001 E200.8 07/20/21 16:51 /jcg <br /> ' Barium ND mg/L 0.05 E200.7 07/19/21 16:47/meh <br /> Beryllium ND mg/L 0.001 E200.7 07/19/21 16:47/meh <br /> Boron 0.10 mg/L 0.05 E200.7 07/19/21 16:47/meh <br /> ' Cadmium ND mg/L 0.001 E200.8 07/20/21 16:51 /jcg <br /> Chromium ND mg/L 0.005 E200.8 07/20/21 16:51 /jcg <br /> Lead ND mg/L 0.001 E200.8 07/20/21 16:51 /jcg <br /> Manganese ND mg/L 0.001 E200.8 07/20/21 16:51 /jcg <br /> ' Molybdenum 0.091 mg/L 0.001 E200.8 07/20/21 16:51 /jcg <br /> Nickel ND mg/L 0.005 E200.8 07/20/21 16:51 /jcg <br /> Selenium 0.131 mg/L 0.001 E200.8 07/20/21 16:51 /jcg <br /> Uranium 1.06 mg/L 0.0003 E200.8 07/20/21 16:51 /jcg <br /> ' Vanadium 0.24 mg/L 0.01 E200.8 07/20/21 16:51 /jcg <br /> Zinc ND mg/L 0.01 E200.8 07/20/21 16:51 /jcg <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 /> ' H-Analysis performed past the method holding time <br /> Page 9 of 31 <br />