Mariette Liefferink OHS Presentation - LexisNexis South Africa

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RADIOLOGICAL RISKS The measured uranium content of many of the fluvial sediments in the Wonderfonteinspruit, including those off mine properties and therefore outside the boundaries of licensed sites, exceeds the exclusion limit for regulation by the National Nuclear Regulator. For approximately 50% of the 47 sampling sites, the calculated incremental doses of the respective critical group are above 1 mSv per annum up to 100 mSv pa (548 mSv pa Blyvooruitzicht Mine/Bridge Carletonville) The radioactive contamination of surface water bodies in the Wonderfonteinspruit catchment area caused by the long-lasting mine water discharges and diffuse emissions of seepage and runoff from slimes dams poses radiological risks to the public resulting from the usage of polluted environmental media; The pathway sediment→SPM →cattle→milk/meat→person (“SeCa”) can cause radioactive contamination of livestock products (milk, meat) resulting in effective doses of the public in some orders of magnitude above those resulting via the pathway “WaCa.
Andries Coetzee’s Dam 900mg/kg U Photo: Courtesy Dr. Henk Coetzee
Page 1 and 2: Compliance levels in mines, what is
Page 3 and 4: COMMON LAW DUTY OF CARE Duty of car
Page 5 and 6: NATIONAL ENVIRONMENTAL MANAGEMENT A
Page 7 and 8: Mine Health and Safety Act The Mine
Page 9 and 10: south african human rights commissi
Page 11 and 12: West Wits Pit
Page 13 and 14: • The potential volume of AMD for
Page 15 and 16: Mining Area Key Issues Witwatersran
Page 17 and 18: •Tailings Dams contain 100 000 to
Page 19 and 20: Sinkholes caused by dewatering and
Page 21: • Stormwater drainage systems, in
Page 24 and 25: Housing Development (Retirement Vil
Page 30 and 31: Uraniferous Tailings Spillages
Page 32 and 33: COLOUR CODING SYSTEM USED FOR TIER
Page 34 and 35: Uranium Concentration
Page 36 and 37: Arsenic Concentration
Page 40 and 41: Tudor Dam -Elevated levels of radio
Page 42: Draft Regional Closure Strategy For
Page 45 and 46: “The most important lesson learnt
Page 48 and 49: Central Basin 60 Mega Litres The ce
Page 50 and 51: Eastern Basin ACID MINE DRAINAGE 10
Page 52 and 53: West Rand goldfields Decanting Volu
Page 54 and 55: Alkaline Acid pH (Logarithmic) 14 1
Page 56 and 57: Pollution Plume
Page 58 and 59: Volumes and loads 2005 - Jan. 2010
Page 60 and 61: In April 2009 the mine void water,
Page 62: 18 Winze
Page 67 and 68: Precipitated Heavy Metals
Page 69 and 70: CPS Pit
Page 71 and 72: Acid Mine Drainage •Long-term exp
Page 73: - Even though a large number of the
Page 77: Tweelopiespruit Inlet
Page 82 and 83: Tweelopiespruit Downstream
Page 88 and 89:
Tweelopiespruit Downstream
Page 90 and 91:
14.0 Inlet to Game Reserve Weekly O
Page 92 and 93:
Inlet to Game Reserve Weekly Oct 20
Page 94 and 95:
Inlet to Game Reserve Weekly Oct 20
Page 96 and 97:
Inlet to Game Reserve Uranium ppb W
Page 98 and 99:
400 Mine Water Dissolved Iron Conce
Page 100 and 101:
Chronological Analysis of AMD: West
Page 102 and 103:
• Implementation of Immediate Sol
Page 104 and 105:
AMD (Phase 1) Capital Cost Grand To
Page 106 and 107:
Enabling Legislation • National W
Page 108:
“It is as unacceptable for compan
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Mariette Liefferink OHS Presentation - LexisNexis South Africa

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