Key terms
Air quality
The degree to which the air in a particular place is pollutant-free.
Air contaminant
Any chemical, physical or biological agent that modifies the natural characteristics of the air.
Sensitive receptor
Areas where occupants may be more sensitive to air pollutants, such as hospitals, schools, daycare facilities and elderly housing.
Air-dispersion modelling
The method of predicting ground-level concentration resulting from sources of air contaminants.
Why study air quality?
Air quality can affect human and environmental health. By recording the air quality in a particular area, Alto planners will better understand how the air might change while building and operating the new railway and what is needed to protect the air
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What do air quality studies involve?
- Establishing present conditions: using a monitoring device, we measure what the air contains in a specific area in its current state.
- Identifying and describing the features of air
- Studying how air may change when building and operating the new railway.
- Developing measures to avoid or reduce potential negative effects.
