Eagle Project Kennecott Eagle Minerals Company Groundwater Discharge Permit Application

Transcription

1 Eagle Project Kennecott Eagle Minerals Company Groundwater Discharge Permit Application Contents 1 Introduction Background Schedule Project Contacts Project Checklist General Project Description Project Location Land Ownership Proposed Surface Facilities Mine Dry/Office and Warehouse Truck Wash & Scales Assay Lab and Cold Storage Fuel Storage Site Access, Parking and Roads Ore Storage and Crushing Ore Transportation Temporary Development Rock Storage Area Soil Stockpiles Contact Water Basins Management of Non-Contact Water Wastewater Treatment Plant Treated Water Infiltration System Backfill Surface Facility Site Utilities Electric Power Communications Site Security Measures Potable and Sanitary Water Proposed Underground Facilities Mine Description Mine Ventilation System Reclamation Mine Schedule Summary of Hydrogeologic Conditions Land Use Designated Well-Head Protection Areas and Surrounding Features Site Investigation and Key Findings Hydrostratigraphic Units...11 LJS\ ii

2 3.2.2 Test Pits and Infiltrometer Tests Groundwater Flow and Aquifer Hydraulic Characteristics Background Groundwater Quality Acceptability of the Site for Discharge Description of Mine Water Sources and Characteristics Operational Water Sources and Characteristics Mine Drainage Water from Temporary Development Rock Storage Area Runoff from Other Areas of the Mine Site Potable Water Supply and Sanitary Wastewater Water Balance Wastewater Management Alternatives Evaluation General Alternatives Minimizing the Volume of Wastewater Recycling Wastewater Connection to a Municipal Treatment System Discharging to Surface Water Treatment Processes Considered Flocculation Settling Oxidation Filtration Ion Exchange Reverse Osmosis Electrolytic Recovery Analysis of Secondary Processes Basis of Design for Proposed Wastewater Treatment System Treatment Method Overview Discharge Standards Design Flows and Pollutant Loading Schematic Flow Diagram Description of Treatment Units Wastewater Storage Main Wastewater Treatment Process Metals Precipitation/Sedimentation ph Adjustment Gravity Filters First Pass Reverse Osmosis System Second Pass Reverse Osmosis System Final Effluent ph Adjustment Final Effluent Storage Effluent Pumping Treated Water Infiltration System Treated Wastewater Reuse Concentrate Reduction Process Breakpoint Chlorination...38 iii

3 Softening/Metals Precipitation Microfiltration ph Adjustment Weak Acid Ion Exchange System ph Adjustment CRP Reverse Osmosis Boron Ion Exchange Sludge Handling Process Evaporator/Crystallizer Process Description of Sludge Management Instrumentation and Controls Adverse Weather Strategies Quality Control Operation and Maintenance Contingencies Land Application of Treated Wastewater Discharge Method - Rapid Infiltration Basis of Design Surface Runoff Prevention Methods Hydraulic Design Engineering Plans Discharge Management Plan Contact Water Basins Basis of Design Design Capacity Liner System Site Development Subgrade Excavation Liner System Construction Quality Assurance Reporting Subgrade Surface GCL Geomembrane Liner Geotextile Protection Layer Sand Protection Layer Certification Report Basin Pumping Systems Proposed Discharge and Groundwater Monitoring During Operations Effluent Monitoring Groundwater Monitoring Monitoring Wells Infiltration Performance Monitoring Background Monitoring Wells Compliance Monitoring Wells Monitoring of Surface Water Quality Sampling Frequency...57 iv

4 9.2.3 Parameters Sampling Procedures Data Analysis and Presentation Compliance with Antidegradation Economic Benefits Estimated Employment Economic Improvements Improvements to Present Road and Rail Systems Social Benefits Lake Superior Basin - Bioaccumulative Substances of Immediate Concern Technical Evaluation of Best Technology in Process and Treatment Wastewater Treatment Processes for Mercury Reduction Compliance with Mercury Standards References...66 Tables Table 3-1 Background Groundwater Quality and Proposed Groundwater Quality Standards...13 Table 4-1 Mine Drainage Water Characteristics...16 Table 4-2 Contact Water Characteristics...18 Table 6-1 Wastewater Flows and Pollutant Concentrations...29 Table 6-2 Design Criteria for Major Wastewater Treatment System Processes...34 Table 8-1 Contact Water Basin Design Criteria...48 Table 8-2 QA Inspector Tests...51 Table 9-1 Proposed Compliance Monitoring Parameter List and Sampling Frequency...58 Table 10-1 Project Employment...61 Figure 2-1 Figure 2-2 Figure 2-3 Figure 2-4 Figure 2-5 Figure 2-6 Figure 2-7 Figure 2-8 Figure 3-1 Figure 3-2 Figure 4-1 Figure 4-2 Figure 6-1 Figure 6-2 Figures (Note: All figures are located after Section 11, page 66) Project Location Project Area Aerial Photographic Map Existing Site Conditions Project Mineral Rights Project Surface Ownership Surface Facility Plan Underground Material Handling Schematic Overall Project Timeline Michigamme Township Zoning Map Project Facility on Aerial Photograph Water Balance - Maximum Annual Precipitation and Mine Inflow Water Balance Average Annual Precipitation and Expected Case Mine Inflow Process Flow Diagram - Main Wastewater Treatment Process Process Flow Diagram - Concentrate Reduction Process v

5 Figure 6-3 Figure 7-1 Figure 7-2 Figure 8-1 Figure 9-1 Process Flow Diagram - Sludge Handling and Evaporation/Crystallization Process Treated Water Infiltration System - Layout and Details Treated Water Infiltration System - Design and Details Contact Water Basin - Typical Section and Details Mercury Monitoring Program Appendices Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H Appendix I Appendix J Appendix K Appendix L Appendix M Groundwater Discharge Permit Application Form Hydrogeologic Report for the Eagle Project Groundwater Discharge Permit Application Water Well Records Background Groundwater Quality Calculations Estimated Inflow to Mine and Modeling of Treated Water Infiltration System E-1 Estimated Inflow to Mine E-2 Analytical Model Calculations for the Treated Water Infiltration System E-3 Groundwater Flow Model of the Treated Water Infiltration System Water Chemistry Data F-1 Water Chemistry of Groundwater Samples Collected in Exploration Holes F-2 Water Chemistry of Mine Drainage Water and TDRSA Water WWTP Influent and Effluent Calculations G-1 Calculations G-2 U.S. Filter Documentation Sizing Calculations for Contact Water Basins and Non-Contact Water Infiltration Basins Mine Water Balance Calculations McIntosh Engineering Discharge Management Plan GCL, HDPE, PVC Product Data and Manufacturer Data and Specifications Analysis of Water Samples for LSB - BSICs Advection Dispersion Model vi