Environmental
performance summary
| Indicator | Performance1 |
|---|---|
| Significant (Level 4) environmental incidents2 | 03 |
| Significant (Level 3) environmental incidents2 | 0 |
| Regulatory reportable environmental incident4 | 0 |
| Spills or discharges5 | 0 |
| Regulatory water discharge exceedances6 | 0 |
| Regulatory non-compliances | 0 |
| Fines and prosecutions – environment | 0 |
| Energy use (2011) in gigajoules | 3,055,437 |
| Total greenhouse gas emissions (2011) (CO2 equivalent emissions) | 331,983 |
| Water input (megalitres) | 6,020 |
| Water recycled (megalitres) | 4167 |
| Water discharged (megalitres) | 0 |
| Waste rock mined (tonnes) | 59,947,816 |
| Tailings produced (tonnes) | 9,687,594 |
| Hazardous waste generated (tonnes) | 620 |
| Total land holding (hectares) | 700,000 |
| Footprint (hectares) | 3,556 |
| Land disturbance (hectares) | 50 |
| Land rehabilitation (hectares) | 10 |
1 Covers an overall ‘reporting period’ that includes Prominent Hill and Exploration from 1 January to 31 December.
2 Level 3 and 4 significant incidents are internally classified as those that cause or have the potential to cause moderate to major environmental impact within OZ Minerals’ operational control.
3 In 2011, a GW&A owned and operated train carrying OZ Minerals copper concentrate derailed at Edith River. In line with our management standards, only incidents that occur within OZ Minerals’ operational control are reported. For more information regarding the incident, see the Transport of Prominent Hill Copper Concentrates section of this report.
4 Incidents that, among other consequences, also result in a legal requirement to report to a regulatory authority.
5 Incidents that typically involve the loss from containment of poor quality mine water or a hazardous chemical or fuel, internally classified as a level 3 or 4 significant incident.
6 Exceedances of water discharge limits as defined in operating licences and permits issued by a regulatory authority.
7 Water balance measurements are currently being expanded to measure recycling capacity at Prominent Hill.
