2010-08-02_REVISION - M1977300 ‎(43)‎

• Permit No: M1977300
• IBM Index Class Name: REVISION
• Doc Date: 8/2/2010
• Doc Name: New Amend- EPP- Cover & Table of Contents
• From: Cotter Corp
• To: DRMS
• Type & Sequence: AM2
• Media Type: D
• Archive: No

Environmental Protection Plan, Schwartzwalder Mine
• 14. GEOCHEMICAL DATA AND ANALYSIS ...................................................................................... 14-1
(a) Geochemical Characterization of Waste Rock and Fill ...................................................14-1
(i) Whole Rock Analysis ................................................................................................14-1
u Acid-Base Accounting 14-2
(iii) Acid Consumption Tests ............................................................................................14-3
(iv) Impact Analysis .........................................................................................................14-3
(b) Geochemical Characterization of Mine Refill Water ....................................................... 14-4
(i) Modeling Approach ................................................................................................... 14-5
(ii) Mass Balance Mixing Model .....................................................................................14-5
(iii) Evaluation of Precipitation and Dissolution Reactions Controlling Mine Water
Chemistry ............................................................................................................14-7
15. MITIGATION OPTIONS AND CONSTRUCTION SCHEDULE ....................................................15-1
(a) Description of Constituents of Concern and Sources .......................................................15-2
(i) Source of Chemical Loading .....................................................................................15-2
(ii) Thickness and Extent of Alluvium ............................................................................ 15-3
(iii) Potential Pathways for Alluvial Groundwater ...........................................................15-3
(iv) Effect of Alluvial Water Quality on Ralston Creek ...................................................15-3
(b) Description of Mitigation Options ................................................................................. ..15-4
(i) Short-term Pump-and-Treat, 50-gpm Ion Exchange Treatment System ................. ..15-4
(ii) Pump-and-Treat, 100-gpm Ion Exchange Treatment System .................................. ..15-5
• (iii) Source Removal .......................................................................................................
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15-8
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(v) Strategically Designed and Constructed Wetlands .................................................. 15-13
(vi) Plugging and Abandonment Program ...................................................................... 15-16
(c) Monitoring Well Installation .......................................................................................... 15-16
(d) Schedule for Engineering Design, Construction, and Mitigation ................................... 15-19
16. QUALITY ASSURANCE AND QUALITY CONTROL ...................................................................16-1
17. PLANT GROWTH MEDIUM (SOILS) ..............................................................................................17-1
18. WILDLIFE PROTECTION ................................................................................................................. 18-1
(a) Mitigation Measures to Prevent Loss of Habitat ..............................................................18-1
(b) Measures to Prevent Wildlife Contact .............................................................................18-1
19. TAILINGS AND SLUDGE DISPOSAL ............................................................................................19-1
20. REFERENCES .................................................................................................................................... 20-1
LIST OF APPENDICES
Appendix A Monitoring Well Logs
• Appendix B Water Quality Data Base
Appendix C Geochemical Model
(Note: Appendices are provided on CD in Section 8)
4109C.100731 Whetstone Associates 6