COBAR MANAGEMENT PTY LTD The CSA Mine Annual Environmental Management Report AEMR 2018 Cobar Management Pty Ltd The CSA Mine Annual Environmental Management Report 2018 Name of Mine CSA Mine Mining Leases CML 5, MPL1093, MP1094 MOP Commencement Date: 01/01/2018 MOP Completion Date: September 2019 AEMR Commencement Date: 01/01/2018 AEMR End Date: 31/12/2018 Name of Leaseholder: Isokind Pty Ltd Name of Mine Operator: Cobar Management Pty Ltd Reporting Officer: Huw Rabone Title: Environmental Superintendent Signature: Date: 29/03/2019 Cobar Management Pty Ltd ABN: 38 083 171 546 PO Box 31, Cobar, NSW 2835 Tel: (02) 6836 5100 Fax: (02) 6836 2146 1. I NTRODUCTION ................................................................................................................... 1 1.1. History of Operations .............................................................................................................. 1 1.2. Consents, Leases and Licenses ................................................................................................ 1 1.3. Mine Contacts ......................................................................................................................... 4 1.4. Actions Required from the 2017 AEMR Review ..................................................................... 5 2. SUMMARY OF OPERATIONS DURING THE REPORTING PERIOD............................................... 6 2.1. Exploration .............................................................................................................................. 6 2.2. Land Preparation ..................................................................................................................... 7 2.3. Construction ............................................................................................................................ 7 2.4. Mining ..................................................................................................................................... 8 2.4.1. Underground Resource Status ............................................................................................ 9 2.4.2. Estimated Mine Life ............................................................................................................ 9 2.4.3. Mining Equipment ............................................................................................................. 10 2.4.4. Mining Method ................................................................................................................. 11 2.4.5. Mine Development ........................................................................................................... 11 2.4.6. Mine Production ............................................................................................................... 11 2.4.7. Backfilling and Tailings ...................................................................................................... 13 2.5. Mineral Processing ................................................................................................................ 14 2.5.1. Metallurgy ......................................................................................................................... 15 2.6. Waste Management ............................................................................................................. 17 2.6.1. General Waste .................................................................................................................. 18 2.6.2. Recycling ........................................................................................................................... 18 2.6.3. Industrial Waste ................................................................................................................ 19 2.6.4. Underground Waste Rock ................................................................................................. 20 2.7. Ore and Product Stockpiles ................................................................................................... 20 2.7.1. Ore Stockpiles ................................................................................................................... 20 2.7.2. Product Stockpiles ............................................................................................................. 20 2.8. Water Management .............................................................................................................. 21 2.8.1. Raw Water Supply ............................................................................................................. 21 2.8.2. Groundwater Sources ....................................................................................................... 23 2.8.3. Water Balance ................................................................................................................... 24 2.9. Hazardous Materials Management ...................................................................................... 24 2.10. Other Infrastructure Management ................................................................................... 25 3. ENVIRONMENTAL MANAGEMENT AND PERFORMANCE ...................................................... 25 3.1. Meteorological Monitoring ................................................................................................... 25 3.2. Air Pollution .......................................................................................................................... 27 3.3. Erosion and Sediment ........................................................................................................... 32 3.4. Surface Water Monitoring .................................................................................................... 34 3.5. Ground Water Monitoring .................................................................................................... 41 3.6. Contaminated Land ............................................................................................................... 47 3.7. Threatened Flora ................................................................................................................... 48 3.8. Threatened Fauna ................................................................................................................. 49 3.9. Weeds ................................................................................................................................... 50 3.10. Blasting .............................................................................................................................. 51 3.11. Operational Noise ............................................................................................................. 51 3.12. Visual, Stray Light .............................................................................................................. 51 3.13. Aboriginal Heritage ........................................................................................................... 52 3.14. Natural Heritage ................................................................................................................ 52 3.14.1. Mining Quarters ................................................................................................................ 52 3.14.2. “Eloura” ............................................................................................................................. 53 3.14.3. The CSA Mine Power House .............................................................................................. 53 3.15. Spontaneous Combustion ................................................................................................. 53 3.16. Bushfire ............................................................................................................................. 53 3.17. Mine Subsidence ............................................................................................................... 54 3.18. Hydrocarbon Contamination ............................................................................................ 55 3.19. Methane Drainage/Ventilation ......................................................................................... 55 3.20. Public Safety ...................................................................................................................... 56 3.21. Other Issues and Risks....................................................................................................... 56 4. COMMUNITY RELATIONS .................................................................................................... 56 4.1. Environmental Complaints .................................................................................................... 57 4.2. Community Liaison ................................................................................................................ 57 4.2.1. Clean Up Australia Day ...................................................................................................... 57 4.2.2. Community Contributions ................................................................................................. 57 5. REHABILITATION................................................................................................................. 58 5.1. Buildings ................................................................................................................................ 59 5.2. Rehabilitation of Disturbed Land .........................................................................................