We monitor air quality at key locations on and adjacent to our mine site on a 24-hour basis. Our Air Quality Monitoring Program is managed in accordance with the Cadia Air Quality Monitoring Program, which was approved by the NSW Department of Planning and Environment (DPE). Cadia reports monthly on Air Quality and these reports are uploaded to our website.
What we monitor
PM10 and PM2.5 Ambient Air Quality Monitoring – BAMs (Beta Attenuation Monitors) provide continuous PM10 and PM2.5 particulate concentration measurements using the industry proven principle of beta ray attenuation. Eight BAM’s are in continuous operation at various locations around the Cadia district.
Dust Deposition Gauges - (DDG’s) are located at eleven sites around the Cadia District and the Cadia Dewatering Plant. The DDGs are analysed monthly for metals and total dissolved and insoluble solids.
Visual Dust Monitoring - Visual dust is monitored during routine inspections and when complaints are received. Where excessive dust generation has been identified, mitigation measures are implemented.
Meteorological Monitoring - We also utilise our on-site weather stations as part of our air quality monitoring program.
Data gathered from our monitors is used, in conjunction with weather forecasts, to plan each day’s operational activities. We change or reduce the operation of equipment to avoid or minimise potential contribution to elevated dust conditions on a case-by-case basis.
Monitoring Vent Emissions
Cadia conducts routine emissions testing at the surface ventilation system, which analyses the air quality of the exhausted air from our underground operations.
The latest monitoring results show that we are operating in full compliance with clean air regulations – the direct action we have taken to comply and curtail emissions from the mine's ventilation rise is having a positive effect and we intend to maintain this compliance.
These results have been provided to the NSW EPA and we continue to maintain regular contact with them on our actions to maintain compliant emissions from the vent rise.
The hot and humid conditions underground result in exhausted air being warm and saturated with moisture. On chilly mornings, the condensation from the exhaust air is often visible on the surface.