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Air Quality - Lakeshore East Joint Corridor

← Return to Early Works: Lakeshore East Joint Corridor

Key Findings

  • Typical of highly urbanized environments like the City of Toronto, there are existing exceedances of vehicle exhaust combustion contaminants benzene and benzo(a)pyrene. High background concentrations of these contaminants are also byproducts of regional industrial operations.
  • Twenty-five sensitive receptors* have been identified in the study area (i.e., semi-detached and detached houses and apartments/condominiums) without mitigation, these locations have the potential to be affected based on proximity to the project footprint and predominant wind direction from the northeast.
  • Seventeen critical receptors** have been identified in the study area (i.e., educational institutions, child daycares, and one retirement home)without mitigation, these locations have the potential to be affected based on proximity to the project footprint and predominant wind direction from the northeast.
  • There is potential for temporary increases in contaminants associated with construction vehicle emissions. These increases will be reduced via implementing appropriate mitigation measures (see Potential Effects & Mitigation Measures for more details).

*A sensitive receptor is a building in which a person resides on a permanent or semi-permanent basis, such as a house or an apartment.
**A critical receptor is a retirement home, hospital, childcare centre, school, or similar institutional building.

Sensitive and Critical Receptors within the East Harbour Station Early Works Study Area

Potential Effects & Mitigation Measures

Potential Effects:

  • Temporary increase in air pollution and odour (e.g., diesel combustion products such as NO2) as a result of construction vehicle emissions and increased traffic due to potential congestion associated with construction activities.
  • Temporary increase in dust, silica and airborne particulate matter resulting from earthworks, material handling and transfer, demolition and construction activities.  

Mitigation Measures:

  • Construction equipment will comply with all applicable regulatory emission standards.
  • Contain (e.g., tarp) sources of dust such as soil stockpiles as required.
  • Full or partial enclosure of demolition and other activities where possible and necessary.
  • Use dust suppressants such as water as required.
  • Implement on-site air quality monitoring and apply threshold “Action Level” triggers for implementation of specific and increasing intensity mitigation activities linked to specific construction activities.
  • Develop a plan to manage air quality throughout construction to ensure consistent attention to mitigation of dust and particulates from the construction site.
  • Develop a communications protocol which includes timely resolution of complaints.

Example of trucks spraying water as part of dust control mitigation for the surrounding community.

Example of trucks spraying water as part of dust control mitigation for the surrounding community.
Source: Metrolinx, 2020.

← Return to Early Works: Lakeshore East Joint Corridor

Submissions are closed.