2025-08-28_HYDROLOGY - M1983194 ‎(7)‎

• Permit No: M1983194
• IBM Index Class Name: Hydrology
• Doc Date: 8/28/2025
• From: NSI
• To: EPA
• Archive: No

Natural Soda LLC 2024 Project Status Report & Annual Plan of Development
iii January 2025
5.1.3. Potentiometric Surface Maps (Confidential) ........................................ 25
5.1.4. Stream Gauging Stations .................................................................... 25
5.2. Injection Well Mechanical Integrity (MIT) ................................................. 29
5.2.1. MIT Introduction ................................................................................... 29
5.2.2. Mechanical Integrity, Part 1 Pressure Testing and Part 2 Temperature
Logging ................................................................................................ 29
6.0 Land Disturbance and Reclamation .............................................................. 30
6.1. Summary of 2024 Disturbance ................................................................ 30
6.2. Regulatory Compliance............................................................................ 32
6.2.1. Regulatory Activity ............................................................................... 32
6.3. Reclamation Activity................................................................................. 32
6.3.1. Regrading & Scarification .................................................................... 32
6.3.2. Seeding & Weed Control ..................................................................... 32
6.3.3. Reclamation Fencing ........................................................................... 32
6.3.4. Precipitation ......................................................................................... 33
6.3.5. Vegetation Monitoring Results ............................................................. 34
6.4. Deer Roadkill Study ................................................................................. 35
6.5. Raptor Survey .......................................................................................... 36
6.6. Other Observations .................................................................................. 36
6.7. Waste Disposal ........................................................................................ 36

List of Figures:
Figure 1: Natural Soda LLC Vicinity Map ........................................................................ 2
Figure 2: NS Sodium Leases Map................................................................................... 3
Figure 3: NS Plant and Well Location Map, Section 26 Detail. ........................................ 4
Figure 4: NS Plant and Well Location Map, Expanded View ........................................... 5
Figure 5: General Flow Process .................................................................................... 14
Figure 6: NS 2024 Pregnant Assays and Production (Confidential) .............................. 21
Figure 7: NS 2024 Production (Confidential) ................................................................. 21
Figure 8: Water Year 2023 Stream Flow (cfs) Vs. Snowpack (Water Eqv (Inch)) ......... 28
Figure 9: Water Year 2024 Stream Flow (cfs) Vs. Snowpack (Water Eqv (Inch)) ......... 28
Figure 10: Ten Year Precipitation Record & 2024 Monthly Totals ................................. 34