Pollution levels are measured inside the stacks, but it’s not possible to measure the actual impact of stack emissions on the ground. How will pollution from stacks be measured?Īir pollution is measured by Roads and Maritime Services (RMS) as part of the operation of the stack ventilation system. Australian standards are not always updated in line with the latest scientific research from around the world. Predicted air pollution from smoke stacks and roads is measured against the ambient air quality standards decided by the National Environment Protection Measure, which was set up in the 1990s by environment ministers who formed a political agreement on air quality standards.Īustralia therefore has lower air quality standards than the global standards set by the World Health Organisation.
How have the government decided if the level of pollution from the stacks will be dangerous? No reasons are given for this policy that stand up to proper analysis. The Liberal government has exactly the same policy for the tollways they are proposing. The former NSW Labor government ignored the huge campaign to filter the M5 tollways and still has refuses to have a policy to filter all smokestacks. As a matter of policy by both Labor and Liberal governments, no tunnel ventilation stacks in NSW are filtered. Will the stacks be filtered to remove toxic gases from the air? Initial plans submitted for a smoke stack at Haberfield suggested it would be 26 metres high. This is a photo of a smoke stack for the M5 motorway at Turrella: Put simply, smoke stacks are chimneys that carry polluted air from road tunnels into the outside environment. In such cases, ventilation stacks have often been used to increase the throughput of fresh air, effectively increasing the allowable vehicle capacity.
However, in busier or longer tunnels (typically those longer than 2km) emissions can build up to levels where in-tunnel air quality exceeds acceptable limits.
Many road tunnels vent exhaust air to the atmosphere at the exit portals. Here's what the NSW Chief Scientist says about smoke stacks: What's a smoke stack? What does it look like? But what are they, and could they be harmful? Smoke stacks (also called exhaust stacks, pollution stacks or ventilation stacks) have been in the news recently regarding both the WestConnex toll road and the Beaches Link.
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