2023-04-26_HYDROLOGY - M2007044

• Permit No: M2007044
• IBM Index Class Name: Hydrology
• Doc Date: 4/26/2023
• Doc Name: Hydrology Report
• From: Energy Fuels Resources Inc
• To: DRMS
• Annual Report Year: 2023
• Report Quarter_Month: 1
• Email Name: ACY
• Email Name: THM
• Media Type: D
• Archive: No

Table 5 Rajah 49 Mine, Thornton Portal (Rajah Spring)
Dissolved Metals (mg/L) Dissolved Radionuclides (pCi/L)
Sample Information As Ba Be B Cd Cr Pb Mn MO Ni Se U V Zn U Ra-226 Ra-228 Ra-226
Ra-228
Thornton Portal (Rajah Spring)
Thornton Portal, EFRC, 9/21/09 1.49 <0.1 <0.01 0.2 <0.01 <0.05 <0.05 <0.01 0.3 <0.05 0.154 2.02 0.3 0.01 1370 9.7 <0.51 <10.2
Thornton Portal, EFRC, 6/30/10 1.39 <0.1 <0.01 <0.2 <0.01 <0.05 <0.05 <0.01 0.2 <0.05 0.146 1.81 0.5 <0.01 1230 15 <1.0 1 <16
Thornton Portal, EFRC, 5/24/11 1.51 <0.1 <0.01 0.2 <0.01 <0.05 <0.05 <0.01 0.3 <0.05 0.142 1.86 0.4 <0.01 1260 12 <1.4 <13
Thorton Portal, EFRC, 5/30/12 1.75 <0.1 <0.01 0.1 <0.01 <0.05 <0.05 0.01 0.3 <0.05 0.189 2.06 0.4 <0.01 1390 11 <.68 <12
Thorton Portal, EFRC, 6/17/2013 1.39 <0.1 <0.01 0.1 <0.01 <0.05 <0.05 0.09 0.3 <0.05 0.154 2.43 0.4 <0.01 1650 16 <1.9 <17.9
Thorton Portal, EFRC, 6/17/2014 1.63 <0.1 <0.01 0.1 <0.01 <0.05 <0.05 0.01 0.3 <0.05 0.19 2.22 0.4 0.01 1500 9.7 <1.0 <10.7
Thornton Portal, EFRI, 8/5/15 2.28 <0.1 <0.01 0.2 <0.01 <0.05 <0.05 <0.01 0.3 <0.05 0.266 2.04 0.4 <0.01 1380 7.4 1.8 9.2
Thornton Portal, EFRI, 6/1/16 1.84 <0.1 <0.01 0.1 <0.01 <0.05 <0.05 <0.01 0.3 <0.05 0.35 2 0.4 <0.01 1350 11 <1.6 <12.6
Thornton Portal, EFRI, 6/7/17 2.11 <0.1 <0.01 0.1 <0.01 <0.05 <0.05 <0.01 0.2 <0.05 0.226 2.34 0.4 <0.01 1580 9.9 1.9 11.8
Thornton Portal, EFRI, 6/20/18 2.51 <0.1 <0.01 0.1 <0.01 <0.05 <0.05 <0.01 0.2 <0.05 0.221 1.68 0.5 <0.01 1140 8.6 <0.5 9.1
Thornton Portal, EFRI, 6/25/19 1.87 <0.1 <0.01 0.1 <0.01 <0.05 <0.05 1 <0.01 0.2 <0.05 0.193 1.94 0.4 <0.01 1310 12.5 1.6 14.1
Thornton Portal, EFRI, 6/24/20 2.48 <0.05 <0.001 <0.05 <0.001 <0.005 <0.001 <0.001 0.245 <0.005 0.217 1.97 0.36 <0.01 1330 8.3 <0.8 <9.1
Thornton Portal, EFRI, 7/13/21 2.54 <0.05 <0.001 0.14 <0.001 <0.005 <0.001 0.001 0.234 <0.005 0.23 2.03 0.38 <0.01 1370 9.1 <0.9 <10.0
Thornton Portal, EFRI, 8/1/22 2.4 <0.05 <0.001 0.15 <0.001 <0.005 <0.001 0.003 0.221 <0.005 0.222 2.05 0.39 <0.01 1390 12.3 <2.1 <14.4
Colorado Water Standards
Ground Water, Domestic 0.01 2.0 0.004 0.005 0.1 0.05 0.05 0.035 0.1 0.05 0.03 5 20 5 c 5 c 5
Ground Water, Agriculture 0.1 0.1 0.75 0.01 0.1 0.1 0.2 0.2 0.02 0.1 2
Surface Water, Stream e, 0.100 0.100 0.75 dis 0.010 0.100 0.100 0.200 0.200 d 2 5 c 5 c 5
Surface Water Domestic 0.1 1.0 0.004 0.005 0.05 0.05 0.05 0.1 0.05 0.03 5 20 5 c 5 c 5
Surface Water, Agriculture 0.1 0.1 0.75 0.01 0.1 0.1 0.2 0.2 0.02 2
EPA Water Standards (h)
Maximum 4 1 0 10 dis,
30 tot
Average 2 0.5 3 dis,
10 tot
Notes:
1. Water standards are provided for reference only. These standards do not apply to the spring water unless it is used for drinking water, irrigation, or other regulated
uses.
2. Concentrations or activity levels above a state or federal standard are shaded for reference purposes. Shading indicates that the measured level is elevated
compared to cetain standards of water use.
3. Metal and radionuclide levels are reported as total recoverable.
Table 5 Water Quality Data
Rajah 49 Mine, Thornton Portal
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