0. Chamber Environmental Workshop
June 2017
Uwe Rentel – SHEQ Manager

1. QKR Namibia Navachab Gold Mine
Owned by QKR Corporate Limited the majority shareholder and Epangelo Mining Company (Pty) Ltd the minority shareholder
1984 gold were discovered after exploration drilling
1988 Construction started and December 1989 first gold bar was poured
2014 QKR Corporation purchased Navachab Gold Mine from AngloGold Ashanti plc.
LOM until 2028

2. Scope of work: Environmental Department
Monitoring
Dust
Groundwater
Drinking water
Waste management
Hazardous – hydrocarbon waste, medical waste, used tyres, neon tubes, redundant chemicals
Non-hazardous – domestic waste, scrap materials, redundant items
Rehabilitation
Maintaining on-site nursery
Rehabilitation planting activities

3. Scope of work: Environmental Department
Assessments
Conduct internal Environmental Audits & Risk Assessments
Coordinate External Environmental Studies
Set mine-wide departmental environmental goals, objectives & targets and track performance
Chemicals management
Oversee safe handling & storage
Maintain chemicals master file

4. Scope of work: Environmental Department
Auditing
Audit sections on Environmental issues
Write corrective action requests and follow up on close-out
Community activities – town cleaning & trimming of trees on sidewalks
Drinking water purification
Mine Closure Plan
Annual measurements & calculations of the Mine Closure Costs

5. The Challenges
One of the biggest challenges for Environmental Team is waste management.
Non-Hazardous waste streams
No recycling facilities in Karibib
Plastic waste sent to Okahandja
Scrap metal and vehicle batteries sold to dealers
Redundant items sold to employees
Hazardous waste streams
Medical waste and hydrocarbon waste taken to Walvis Bay.
Used Oil sold to dealers
Used Tyres?
Transformer oils?

6. The Successes Continuous rehabilitation during LOM
Tailing Storage Facility 1 closed and rehabilitated
TSF1 was commissioned in 1989
Footprint m2
Capped area m2
Re-hab Costs N$
Last year of use 2003
Duration of rehabilitation was three years

7. The Successes
Busy capping the top of the slime with about 30cm layer of weathered shist

8. The Successes
Aerial pictures from TSF 2004 & 2016

9. The Successes
Revegetated TSF after a good rainy season

10. The Successes Rehabilitated Waste Rock Dump
Rehabilitated WRD area is 9.6 ha
Sloped at an angel of 18° or less
Cover the WRD wall with weathered schist
Re-vegetated by planting indigenous trees, shrubs and aloes
Grass re-vegetation occurred naturally through good rains
2000 trees & aloes were planted during October 2005 & March 2006

11. The Successes
Rehabbed Waste Rock Dump
No rehab done
Rehab done

12. The Successes
Re-vegetated top of the WRD

13. The Successes Grid A Closure
Grid A mineralization discovered November 1985
Mining commenced January 2006
Footprint of pit ha
Footprint of WRD ha
Re-hab. costs N$
Last year of use
Re-hab. Duration one year

14. The Successes
Grid A before rehabilitation

15. The Successes
Grid A dozing, capping and tree planting

16. The Successes
Grid A WRD after re-hab. & wildlife grazing on the WRD

17. The Successes Introducing the Filter Plant versus TSF Water recovery
Filter Plant up to 75%
Water usage from NAMWATER the same but we could justify to introduce the DMS plant
Treating 600t/h ore instead of 180t/h

18. What more could be done
Rehabilitation of hydrocarbon contaminated soil
Bioremediation of greases and transformer oils
Dust suppression mine wide (haul roads, crusher etc.)

19. Suggestions for COM Looking into the waste management
Hazardous waste streams
Medical waste taken to Walvis Bay.
Rather have an incinerator in the central region as well? Medical waste and hydrocarbon waste taken to Walvis Bay.
Hydrocarbon waste taken to Walvis Bay.
Is this the best possible practice? Is disposal on site according to best practice guidelines not less polluting taken into account that the hazardous waste site is within close proximity to sea water?
Used Tyres
Can mines put heads together and purchase an industrial tyre shredder – shredded material can be used for road building?
Transformer oils
– Currently no safe disposal method and just collected and stored on site. Options?

20. Questions ?