2025-07-29_HYDROLOGY - M2007044

• Permit No: M2007044
• IBM Index Class Name: Hydrology
• Doc Date: 7/29/2025
• Doc Name: Hydrology Report
• From: Energy Fuels Resources Inc
• To: DRMS
• Annual Report Year: 2025
• Report Quarter_Month: 2
• Permit Index Doc Type: Hydrology Report
• Email Name: ACY
• Email Name: THM
• Media Type: D
• Archive: No

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Table 6 Whirlwind Mine Waste Rock
Whirlwind Mine Waste Rock Samples
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Sample ID WW 04 WW 05 WW 06 WW WR 2022 Whirlwind 1 2023 Whirlwind 2024
WR-Comp. WR-Comp.
SYNTHETIC PRECIPITATION LEACHING PROCEDURE(SPLP)ANALYSES(DISSOLVED)
SPLP Extractable Physical Properties
TDS mg/L 1 52 1 40 1 52 1 30 1 830 1 910 "
pH S.U. 10.1 10.2 10.1 9.87 9.4 9.71
Hardness mg/L 17.5 17 10.7 13 18 86.3
Alkalinity(Total) mg/L 34 37 36 35 89 152
Conductance PS/Cm 83.5 87.9 92.6 96 212 402
SPLP Extractable Major Ions
Sodium mg/L 10 8.6 11.2 12.3 42.0 88.6 "
Calcium mg/L 5.2 5.3 3.0 3.4 2.0 88.6 "
Magnesium m /L 1.1 0.9 0.8 1.0 3.0 88.6
Potassium mg/L <0.5 <0.5 2.6 4.0 7.0 88.6
Chloride mg/L <1 <1 <1 2 13 88.6
Flouride mg/L <0.1 <0.1 0.1 0.1 0.2 88.6
Nitrate mg/L <0.1 <0.1 <0.1 1.2 <0,1 88.6
Nitrite mg/L <0.1 <0.1 <0.1 I <0.1 0.3 88.6
Phosphorous mg/L <0.1 <0.1 1 <0.1 <0.1 0.4 88.6
Bicarbonate as HCO3 mg/L 24 25 1 24 23 79 88.6
Silica mg/L 2.6 2.8 1 3.3 4.7 94.5 88.6
Sulfate m /L 4 2 3 6 4 88.6
SPLP Extractable Metals
Aluminum mg/L 0.2 0.2 0.2 0.7 14.2 61.9 "
Antimony mg/L <0.001 <0.001 <0.001 <0.001 <0.005 <0 005
Arsenic mg/L 0.033 0.002 0.026 0.040 0.014 0,019 "
Barium mg/L <01 0.2 <0.1 <0.1 <0.1 <0.1 "
Beryllium mg/L <0.001 <0.001 <0.001 <0.001 <0.001 <0.002 "
Boron mg/L <0.1 <0.1 <0.1 <0.1 0.1 0.54
Cadmium mg/L <0.002 <0.002 <0.001 <0.001 <0 001 <0.001
Chromium mg/L 1 <0.05 <0.05 <0.05 <0.05 <0.01 0.0196 "
Copper mg/L <0.01 <0.01 I <0.01 <0,01 <0.01 <0.01
Iron mg/L 0.07 0.05 0.11 0.32 4.93 21.1
Lead mg/L <0.001 <0.001 <0.001 0.002 0.001 0.00137
Manganese mg/L <0.01 <0.01 <0.01 <0.01 0.02 0.0718
Mercury mg/L <0.001 <0.001 <0.001 <0.001 <0.001 <0.001
Molybdenum mg/L <0.1 <0.1 <0.1 <0.1 <0.02 <0 02
Nickel mg/L <0.05 <0.05 <0.05 <0.05 <0.01 0,0406 "
Selenium mg/L 0.014 <0.004 <0.004 0.012 0.007 0.0151 "
Silver mg/L <0.01 <0.01 <0.01 <0.01 <0.003 <0 003
Thallium mg/L <0.001 <0.001 <0.001 <0.001 <0.001 <0.001
Uranium mg/L <0.0004 <0.0004 <0.0004 0.0066 0.0005 0.00323
Vanadium mg/L <01 <0.1 <0.1 <0.1 <0.02 0.0397
Zinc m /L 0.05 0.02 0.02 0.01 <0.02 0.0628 "
SPLP Extractable Radionuclides
Uranium pCi/L <0.3 <0.3 <0.3 4.5 0.3 2.2 "
Gross Alpha pCi/L 5.3 2.4 2.6 6.7 4.2 7.3
Gross Beta pCi/L 6.4 <2.0 4.7 <5.5 4.2 8.5 "
Radium-226 pCi/L <0.2 <0.2 <0.2 0.20 <2 2.2 "
Radium-228 pCi/L <1.0 <1.0 <1.0 <1.4 <2 <1
Radium-226+-228 pCi/L <1.2 <1.2 <1.2 <1.6 <4 <3.2 "
Notes:
1.3Q08-4Q09 sample was a composite of waste rock grab samples collected on
11/4/08,3/5/09,6/19/09 and 9/8/09
Lab reporting delay,will update in the future
Not sampled,no wate rock
Table 6 Total and SPLP Data
Whirlwind Mine Waste Rock
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