2018-08-16_REVISION - M2012032

• Permit No: M2012032
• IBM Index Class Name: Revision
• Doc Date: 8/16/2018
• Doc Name: Request for Technical Revision
• From: Brian K. Briggs
• To: DRMS
• Type & Sequence: TR10
• Email Name: THM
• Email Name: WHE
• Media Type: D
• Archive: No

Pnrdeged and Con(idenna!-Attorney Chent Communication Geosyntec"
consultant"
TABLE OF CONTENTS
1. INTRODUCTION..................................................................................................... 1
1.1 Overview.......................................................................................................... 1
1.2 Mine Background............................................................................................. 1
1.3 Treated Water Discharge Limits...................................................................... 3
1.4 Work Plan Objectives and Content.................................................................. 5
2. CONCEPTUAL DESIGN AND SCHEDULE .........................................................6
2.1 Existing Infrastructure...................................................................................... 6
2.2 Passive Treatment Technology Review........................................................... 8
2.3 Conceptual Passive Hybrid Process Flow Diagram....................................... 11
3. PILOT AND BENCH TESTING APPROACH...................................................... 14
3.1 Testing Overview and Schedule..................................................................... 14
3.2 Bench-Scale Jar Testing................................................................................. 15
3.3 Pilot-Scale Testing......................................................................................... 17
4. SAMPLING AND MONITORING ........................................................................22
4.1 Sampling and Analytical Plan........................................................................22
5. STAFFING APPROACH........................................................................................25
6. REFERENCES........................................................................................................26
LIST OF TABLES
Table 1: Mine Site Design Considerations
Table 2: Water Quality Discharge Limits
Table 3: Work Plan Structure and Objectives
Table 4: Calculated Volumetric Capacity of Water System
Table 5: Water System Residence Times
Table 6: Key Process Evaluations
Table 7: Treatment Objectives and Design Considerations
Table 8: Overview of Testing
Treatabilrty Study Work Plan 11 February 8,2018