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ENERGY 0 Trust our People Trust our Data. Billings,MT 406.252.6325•Casper WY 307.235.0515 <br /> LAEORATORIES Gillette,WY 307.686.7175•Helena,MT 406.442.0711 <br /> LABORATORY ANALYTICAL REPORT <br /> Prepared by Casper,WY Branch <br /> Client: Energy Fuels Resources(USA) Inc Report Date: 10/01/24 <br /> Project: Whirlwind Annual Collection Date: 09/11/24 09 20 <br /> Lab ID: C24090489-001 DateReceived: 09/12/24 <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 243 mg/L 5 A2320 B 09/16/24 12 45/dmb <br /> Bicarbonate as HCO3 297 mg/L 6 A2320 B 09/16/24 12 45/dmb <br /> Chloride 14 mg/L 1 E300 0 09/16/24 22 29/dmb <br /> Fluoride 0 3 mg/L 0 1 A4500-F C 09/18/24 11 59/dmb <br /> Sulfate 36 mg/L 1 E300 0 09/16/24 22•29/dmb <br /> Calcium 91 mg/L 1 E200 7 09/19/24 15 00/eli-b <br /> Magnesium 10 mg/L 1 E200 7 09/19/24 15 00/eli-b <br /> Potassium 1 mg/L 1 E200 7 09/19/24 15 00/eli-b <br /> Sodium 21 mg/L 1 E200 7 09/19/24 15 00/eli-b <br /> INORGANICS <br /> Sulfide ND mg/L 1 A4500-S F 09/13/24 13 07/jlsl <br /> Sulfide as Hydrogen Sulfide(H2S) ND mg/L 1 A4500-S F 09/13/24 13 07/lls1 <br /> PHYSICAL PROPERTIES <br /> pH 7 6 s u H 0 1 A4500-H B 09/13/24 11 14/tlsl <br /> pH Measurement Temp 10 5 °C A4500-H B 09/13/24 11 14/1ls1 <br /> Solids,Total Dissolved TDS @ 180 C 342 mg/L 20 A2540 C 09/13/24 15 16/slf <br /> Solids,Total Suspended TSS @ 105 C 4 mg/L 2 A2540 D 09/13/24 11 10/slf <br /> NUTRIENTS <br /> Nitrogen, Nitrate as N 0 16 mg/L 0 05 10 E353.2 09/20/24 19 10/dmb <br /> Nitrogen, Nitrite as N ND mg/L 0 01 A4500-NO2 B 09/12/24 15 05/llsl <br /> Nitrogen,Nitrate+Nitrite as N 0 16 mg/L 0 05 E353 2 09/17/24 11'43/dmb <br /> Phosphorus,Total as P ND mg/L 0 01 E365 1 09/24/24 10 48/dmb <br /> METALS, DISSOLVED <br /> Arsenic 0 005 mg/L 0 001 E200 8 09/17/24 11 28/eli-b <br /> Barium 0 11 mg/L 0 05 E200 8 09/17/24 11 28/eli-b <br /> Beryllium ND mg/L 0 001 E200 8 09/17/24 11 28/eli-b <br /> Boron ND mg/L 0 05 E200 7 09/19/24 15 00/eli-b <br /> Cadmium ND mg/L 0 001 E200 8 09/17/24 11-28/eli-b <br /> Chromium ND mg/L 0 005 E200 8 09/17/24 11 28/eli-b <br /> Lead ND mg/L 0 001 E200 8 09/17/24 11 28/eli-b <br /> Manganese 0 002 mg/L 0 001 E200 8 09/17/24 11 28/eli-b <br /> Molybdenum ND mg/L 0 001 E200 8 09/17/24 11 28/eli-b <br /> Nickel ND mg/L 0 005 E200 7 09/19/24 15 00/eli-b <br /> Selenium 0 002 mg/L 0 001 E200 8 09/17/24 11 28/eli-b <br /> Uranium 0 0014 mg/L 0 0003 E200 8 09/17/24 11 28/eli-b <br /> Vanadium ND mg/L 0 01 E200 8 09/17/24 11 28/eli-b <br /> Zinc ND mg/L 0 01 E200 8 09/17/24 11 28/eli-b <br /> DATA QUALITY <br /> Solids,Total Dissolved-Calculated 338 mg/L 1 00 A1030 E 09/30/24 12 04/dmb <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 4 of 34 <br />