The Mangoola Air Quality Management Plan describes air quality management and monitoring requirements associated with operating the mine. The dust emissions from Mangoola are subject to strict limits contained in our Project Approval. Mine dust is generated from the disturbance of soil and rock material by equipment such as the shovel; bulldozing; blasting and vehicles on dirt roads. Dust is additionally generated from the wind blowing over exposed ground and stockpiles.
A number of procedures have been developed to control dust emissions and include:
- Watering of active mining areas, active spoil emplacement areas and haul roads that are subject to frequent vehicle movements;
- All drill rigs are equipped with dust control systems and are regularly maintained for effective use;
- Automatic sprays fitted to the dump hopper and crushing plant to minimise dust from coal processing activities;
- Minimising the area of disturbance by restricting vegetation clearing ahead of mining operations and rehabilitating mine spoil dumps as soon as practicable after mining;
- Restricting or ceasing dust-generating activities on extremely windy or dry days; and
- Restricting blasting activities to periods of acceptable wind speed and direction.
We operate the following monitoring equipment for the measurement of air quality:
- Eighteen depositional dust gauges which are monitored monthly;
- Five Tapered Element Oscillating Microbalance (TEOM) dust monitors continuously measuring PM10;
- Two PM10 E-Sampler Particulate Monitors continuously measuring PM10;
- Three High Volume Air Samplers (HVAS) measuring Total Suspended Particulates (TSP) over one 24-hour period every six days; and
- Four High Volume Air Samplers (HVAS) measuring PM10 over one 24 hour period every six days.