2021-10-12_HYDROLOGY - M2007044

• Permit No: M2007044
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/12/2021
• Doc Name: Hydrology Report
• From: Energy Fuels
• To: DRMS
• Annual Report Year: 2021
• Report Quarter_Month: 3
• Email Name: ACY
• Media Type: D
• Archive: No

Table 5 Rajah 49 Mine, Thornton Portal (Rajah Spring)
General Parameters Major Ions (mg/L)
Sample Information Flow TSS TDS pH Alk Cond Na Ca Mg K Cl F NO, P HCO, SO,
(mg/L) (mg/L) (s.u.) (mg/L) (pS/cm)
Thornton Portal (Rajah Spring)
Thornton Portal, EFRC, 9/21/09 1-2 5 581 8.58 373 938 209 7 3 6 20 0.4 0.3 0.062 412 96
Thornton Portal, EFRC, 6/30/10 1-2 <4 537 8.9 379 889 207 7 3 7 23 0.3 0.2 0.102 431 86
Thornton Portal, EFRC, 5/24/11 <1 <4 571 9.16 360 985 216 7 3 6 24 0.4 0.2 0.091 403 93
Thorton Portal, EFRC, 5/30/12 <1 6 550 8.8 361 939 201 9 3 6 23 0.3 0.2 0.058 404 87
Thorton Portal, EFRC, 6/17/2013 <1 412 691 7.95 379 844 92 9 3 7 25 0.3 0.32 0.192 441 92
Thorton Portal, EFRC, 6/17/2014 <1 <10 579 8.69 366 973 209 7 3 6 24 0.3 0.5 0.196 414 94
Thornton Portal, EFRI, 8/5/15 <1 <10 578 8.35 352 1030 210 8 3 6 24 0.4 0.5 0.053 393 92
Thornton Portal, EFRI, 6/1/16 <1 <10 584 8.77 386 888 207 7 3 6 22 0.3 0.6 0.053 430 84
Thornton Portal, EFRI, 6/7/17 <1 10 569 8.74 360 910.7 200 7 3 6 25 0.3 0.7 0.053 405 100
Thornton Portal, EFRI, 6/20/18 <1 3 599 8.75 356 642 219 6 3 6 24 0.3 0.58 0.074 399 93
Thornton Portal, EFRI, 6/25/19 <1 <1 563 8.72 357 859 199 7 3 6 23 0.3 0.43 0.08 396 88
Thornton Portal, EFRI, 6/24/20 <1 <1 577 8.76 363 827 223 7 3 6 22 0.3 0.61 0.130 409 84
Thornton Portal, EFRI, 7/13/21 <1 1 580 8.80 355 907.5 202 7 3 6 24 0.3 0.48 0.066 402 98
Colorado Water Standards
Ground Water, Domestic 6.5 to 8.5 250 4.0 10.0 250
Ground Water, Agriculture 6.5 to 8.5 2 100
Surface Water, Stream e,f 6.5 to 9.0
Surface Water, Domestic 5.0 to 9.0 250 2.0 10 250
Surface Water, Agriculture 100
EPA Water Standards (h)
Maximum 30 6.0 to 9.0
Average 20 6.0 to 9.0
Notes:
1. Water standards are provided for reference only. These standards do not apply to the site groundwater unless it is used for drinking water, irrigation, or other
regulated uses.
2. Concentrations or activity levels above a state or federal standards are shaded for reference purposes. Shading indicates that the measured level is elevated
compared to certain 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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