While the initial demolition of Boiler House 4 resulted in a partial completion, the results of onsite monitoring provided confidence around the processes in place. Workers and members of the public remained safe and without injury and there was no threat or risk to the local community or the environment.
The results of monitoring for noise, dust and asbestos indicated that the demolition complied with all applicable regulatory standards. All asbestos monitoring confirmed no positive detections of asbestos fibres anywhere on site.
• With reference to the EPA AirWatch Criteria, the monitoring results confirmed that the air quality was of a GOOD standard with reference to PM2.5 and PM10 at monitored boundary locations post the Stage 4 Boiler House demolition.
• Measured noise levels at the town boundary of Morwell and Churchill were 130dB(L) and 128 dB(L) respectively, both below the recommended OHS Noise standard of 140 dB(L).
• With respect to Asbestos monitoring program, all monitoring results were below the laboratory detection limit of 0.01 fibres/mL of air in general accordance with the OHS Regulations 2017. S.R. No. 22/2017 and Membrane Filter Method for Estimating Airborne Asbestos Fibres [NOHSC:3003(2005)].
The monitoring reports are available on the website www.hazelwoodrehabilitation.com.au, along with any updates about today's controlled explosive collapse.
Demolition of the remaining three Boiler Houses (3, 2 and 1) are scheduled for demolition in 2021, along with the two remaining dredgers in the mine area.