Notice of Determination

April 23, 2025 – ADM Aéroports de Montréal has determined that the project for the expansion of the south dock at Bombardier at YUL Montréal-Trudeau International Airport is not likely to cause significant adverse environmental effects by applying the mitigation measures planned for the project.

This determination was based on a consideration of the following factors:

• Technically and economically feasible mitigation measures listed below;
• Community knowledge;
• Indigenous knowledge and impacts on rights of Indigenous peoples.

The mitigation measures considered for this determination are as follows:

Management of contaminated soil and waste:

• External soil disposal and soil management according to characterization results in compliance with applicable laws and regulations.
• Manage construction, dismantled and aggregate materials according to MELCCFP guidelines and good environmental practices.
• Implement debris containment and stabilization measures.
• Cover bare surfaces and piled materials to limit dispersion.
• Recover and manage contaminated stormwater off-site or discharge it to the sewer, subject to a municipal permit.
• Monitor water quality during the work.
• Restore damaged ditches after the work.

Preservation of surface water quality:

• Install and maintain sediment barriers to prevent contamination of ditches and watercourses.
• Adapt measures according to weather forecasts and ensure their effectiveness during periods of site closures.
• Refuel land machinery more than 30 meters from ditches/watercourses and on an impermeable surface.
• Ensure the proper functioning of the machinery.
• Have an oil recovery kit and environmental incident response plan on the site.
• Equip equipment with source recovery systems when necessary.
• Clean concrete transport vehicles in watertight basins to prevent overflow.
• Obtain a municipal permit for the discharge of wastewater from concrete cleaning.

Air quality and greenhouse gas (GHG) reduction:

• Monitor dust emissions and apply control measures.
• Spread dust suppressant in unpaved areas with a restriction at less than 60 m from ditches.
• Avoid unnecessary operation of engines, machinery and trucks.
• Install protective tarpaulins on trucks to limit the dispersion of materials.
• Limit the speed of vehicles on the site to 15 km/h.
• Maintain vehicles and machinery in good working order.
• Check that the equipment has a suction system at the source.

Reduction of noise pollution:

• Identify noisy equipment at the beginning of the work in order to apply the appropriate mitigation measures.
• Ensure that all equipment is equipped with mufflers in good working order.
• Limit the number of devices in operation simultaneously.
• Stop the operation of motorized machinery during periods of inactivity.
• Prohibit panel banging when unloading materials.
• Reduce the use of vehicles backing up on the construction site.
• Favour broadband or dimmable reverse alarms to minimize noise pollution.

Accordingly, ADM Aéroports de Montréal may exercise its powers to enable the project to be carried out.