Notice of Determination

June 6, 2025 – ADM Aéroports de Montréal has determined that the the project to build a parking lot at 400 Michel-Jasmin Avenue in Dorval is not likely to cause significant adverse environmental effects by applying the mitigation measures planned for the project.

This decision is based on the following factors:

• Mitigation measures that are technically and environmentally feasible below;
• Community knowledge;
• Knowledge and impacts on the rights of Indigenous peoples.

The mitigation measures considered in this determination are as follows:

Air quality

• Water work areas to limit dust, use dust suppression techniques, install barriers to limit dispersion.
• Plan the work according to the weather conditions to avoid excessive dispersion of dust in dry and windy weather.
• Minimize truck movements and low-load engine operating periods.
• Use of low-emission vehicles and machines for heavy-duty tasks.
• Avoid idling vehicles.
• Implement a speed limit of 10 km/h to slow down vehicles and thus reduce fugitive dust emissions.
• Ensure that the emission control systems of heavy machinery and vehicles are efficient.

Soil quality

• Implement a waste management plan, sort materials for recycling, evaluation and treatment of contaminated soils if necessary (concrete, metal, wood, asphalt).
• Identification and management of soils contaminated by substances such as hydrocarbons or heavy metals.
• Management of excess excavated material (e.g., transportation to authorized disposal sites).
• Stabilization of the soil with appropriate techniques to prevent erosion.
• Management of excavated soil to avoid contamination and ensure compliance with environmental standards.
• Management plan for the disposal of oils and other chemicals, with appropriate collection and treatment tanks.
• Carry out the refueling away from rain manholes.
• If fuel tanks (whether or not connected to a generator) are present, ensure their protection by the installation, such as bollards and a holding pan.
• Provide oil spill response kits containing the necessary equipment according to site conditions as well as a spill response procedure.
• The contractor must provide an Environmental Emergency Response Plan (EUEMP).
• Inspect machinery regularly to quickly identify equipment breakdowns that could lead to leaks and avoid spills.
• When managing contaminated soils, the contractor must:
• Segregate excavated soils according to their level of contamination.
• Whenever possible, load soil directly from the excavation into trucks if disposed of off-site.
• If necessary, the top of the truck bed must be covered with an impermeable tarp to prevent the introduction of precipitation into the truck bed and to retain contaminated soil inside the truck bed.
• Place excavated contaminated soil on an impermeable membrane to prevent contamination of the underlying soil.
• Cover contaminated soil with a membrane in material storage areas.
• When possible, prioritize the reuse of land whose environmental and geotechnical quality is consistent with the use of the site.
• Where applicable, soil storage must respect the minimum distance required between the soil and watercourses.
• Develop a management plan for excavated materials. If applicable, manage contaminated soil and excess excavation in accordance with Appendix 5: Excavated Soil Management Grid of the MELCCFP's Intervention Guide - Soil Protection and Rehabilitation of Contaminated Sites. On-site management of excavated material must be carried out according to the criteria of the CCME (federal).
• All soils with concentrations above criterion "A" of the Intervention Guide must be monitored through the Traces Québec traceability system if they are disposed of off-site.

Water quality

• Establish temporary retention basins, clean work surfaces, drainage control and treatment of runoff water to avoid contamination.
• Install temporary rainwater management systems (retention basins, pipes to capture runoff water).
• Maintain the integrity of the existing drainage network to prevent overflow or contamination of water.
• Continuous monitoring of stormwater quality.
• Maintain the effectiveness of measures during periods of flooding and heavy rains.
• Carry out the management of residual hazardous materials, refuelling and maintenance of machinery in a designated area away from ditches, manholes and watercourses. Good practices must be applied (oil collection bins during storage and/or maintenance) and these must be validated by the supervisor.
• Characterize the excavated water before discharge if it is likely to reach the storm water system or if it is disposed of externally

Noise and vibration

• Limit working hours to avoid nuisance during night hours.
• Use of low-noise equipment, installation of sound protection.
• Equip equipment remaining on site with a white noise or broadband backup alarm.
• Manage vehicle flows to avoid congestion and reduce periods of heavy traffic.
• Avoid banging of the rear panels when unloading materials.
• Ensure proper maintenance of equipment and the good condition of the mufflers and catalytic converters of the machinery.

Fauna and flora

• Control of invasive vegetation (e.g. phragmites and buckthorn) during the construction phase.
• Reduce the impact on vegetated areas and replace the vegetation affected after the works, tree plantations and hedges to promote biodiversity.
• Carry out activities likely to harm migratory birds, their eggs or nests (e.g. cutting trees and shrubs) outside the migratory bird nesting season (mid-April to late August).

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