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We understand there are many questions about air quality, especially in relation to motorway road tunnels in Sydney. This portal provides you with key information about air quality in Sydney, how our ventilation systems work to manage air quality within and outside the tunnels, what has contributed to improved vehicle emissions over the past 20 years and where to go for more detailed information.
State-of-the-art pulverisers and shears are jaw-like excavator attachments. They crush and cut away at the walls and floors of buildings during demolition.
We use them because they make significantly less noise than hydraulic hammers.
TBM dive site
Two tunnel boring machines (TBMs) will be launched at the Marrickville dive site. It will be a tunnelling support site and provide the services TBMs need to build the tunnels such as grout, water, power and spoil removal.
Noise walls are built at some sites to reduce the impact of noisy works on the community.
We will be carrying out a community consultation where you can learn about the Gateway to the South works, ask questions about the project and give your feedback. Please feel free to drop in at the following locations:
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What is PM10 and PM2.5?
PM2.5 are tiny particles of particle matter, thirty times smaller than a strand of human hair.
Air pollution in Australia is measured by six main contributors; carbon monoxide, nitrogen dioxide, photochemical oxidants, sulphur dioxide, lead and particle pollution or particle matter (PM). PM is generally classified according to the size of the particles.
Particles less than 10 micrometres in diameter are called PM10,
Particles less than 2.5 micrometres in diameter are PM2.5,
Particles less than 1 micrometre in diameter are PM1,
Particles less than 0.1 micrometres in diameter are called ultrafine particles (UFPs).
It is important to note that PM10 includes PM2.5, PM1, and UFPs.