Proposed Limpopo West Mine Concept Study ... - SRK Consulting

SRK Consulting: 447493: Limpopo West GeochemPage viTable of ContentsExecutive Summary ..................................................................................................................................... iiConstruction and Operational Phase Mitigation Measures................................................................ ivList of Figures ................................................................................................................. viiiDisclaimer .................................................................................................................................................... ixGlossary, Acronyms and Abbreviations .......................................................................... x1 Introduction ................................................................................................................ 122 Project Description ..................................................................................................... 122.1 Locality .............................................................................................................................................. 122.2 Climate .............................................................................................................................................. 142.3 Geology ............................................................................................................................................. 142.4 Hydrology and Hydrogeology ............................................................................................................ 162.5 Mine Plan .......................................................................................................................................... 162.6 Processing ........................................................................................................................................ 183 Objectives and Work program .................................................................................. 183.1 Objectives ......................................................................................................................................... 183.2 Work Program ................................................................................................................................... 184 Assumptions and Limitations ................................................................................... 185 Geochemical Characterisation .................................................................................. 195.1 Approach and Methodology .............................................................................................................. 195.1.1 Reviewed Reports ................................................................................................................. 205.2 Sampling ........................................................................................................................................... 205.3 Data analysis and interpretation ....................................................................................................... 235.3.1 Acid Base Accounting ........................................................................................................... 235.3.2 NAG Test ............................................................................................................................... 255.3.3 Metal Leachibility ................................................................................................................... 275.3.4 Pit Water ................................................................................................................................ 305.4 Comparison with Previous Studies ................................................................................................... 345.4.1 IGS Study (2009) – Groundwater Resource Assessment of the Waterberg Coal Reserves 345.4.2 Sasol Mafutha (SRK, 2011)................................................................................................... 355.4.3 Summary ............................................................................................................................... 376 Geochemical Impact ................................................................................................... 386.1 Recommended Mitigation Measures ................................................................................................ 386.1.1 Construction and Operational Phase Mitigation Measures ................................................... 386.1.2 Decommissioning and Closure Phase Mitigation Measures ................................................. 397 CONCLUSION ............................................................................................................. 408 References .................................................................................................................. 42GOGP/LAKJ Report_April2013_19April2013 (1)_Final_Ludi_22052013 April 2013