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1!zAn3&6caf• Pace Analytical 1673 Terra Avenue Sheridan,WY 82801 ph:(307)672-8945 ANALYTICAL QC SUMMARY REPORT CLIENT: Energy Fuels Resources(USA) Inc. Date: 3/22/2023 Work Order: S2302101 Report ID: S2302101001 Project: Whirlwind Dissolved Metals by ICPMS EPA 200.8-Water Sample Type: MS Units: mg/L S2302101-002BS(02/09/23 23:02) RunNo:207902 Analyte Result RL Spike Ref Samp %REC %Rec Limits Qual Copper 0.60 0.01 0.6 ND 99.6 70-130 Lead 0.568 0.001 0.6 ND 94.6 70-130 Molybdenum 0.60 0.02 0.6 ND 99.5 70-130 Selenium 0.579 0.005 0.6 ND 96.6 70-130 Silver 0.550 0.003 0.6 ND 91.7 70-130 Thallium 0.591 0.001 0.6 ND 98.5 70-130 Uranium 0.589 0.0003 0.6 ND 98.2 70-130 Vanadium 0.60 0.02 0.6 ND 100 70-130 Dissolved Metals by ICPMS EPA 200.8-Water Sample Type: MSD Units: mg/L S2302101-002BMSD(02109/23 23:08) RunNo:207902 Analyte Result RL Conc %RPD %REC %RPD Limits Qual Antimony 0.607 0.005 0.596 1.97 101 20 Arsenic 0.687 0.005 0.590 0.424 97.9 20 Barium 0.6 0.1 0.6 2.55 95.7 20 Cadmium 0.589 0.001 0.581 1.44 98.2 20 Copper 0.60 0.01 0.60 0.685 100 20 Lead 0.587 0.001 0.568 3.40 97.9 20 Molybdenum 0.59 0.02 0.60 0.992 98.5 20 Selenium 0.597 0.005 0.579 3.02 99.5 20 Silver 0.571 0.003 0.550 3.70 95.1 20 Thallium 0.600 0.001 0.591 1.61 100 20 Uranium 0.587 0.0003 0.589 0.414 97.8 20 Vanadium 0.58 0.02 0.60 3.00 97.4 20 Dissolved Metals by ICPMS EPA 200.8-Water Sample Type: DUP Units: mg/L S2302101-002BD(02/09/23 22:44) RunNo:207902 Analyte Result RL Ref Samp %RPD %REC %RPD Limits Qual Antimony ND 0.005 ND 20 Arsenic ND 0.005 ND 20 Barium ND 0.1 ND 20 Cadmium ND 0.001 ND 20 Copper ND 0.01 ND 20 Lead ND 0.001 ND 20 Molybdenum ND 0.02 ND 20 Selenium ND 0.005 ND 20 Silver ND 0.003 ND 20 Thallium ND 0.001 ND 20 Uranium ND 0.0003 ND 20 Vanadium ND 0.02 ND 20 Page 5 of 16