Notice of Determination

July 30, 2025 - ADM Aéroports de Montréal has determined that, by applying the mitigation measures provided for in the project, the construction of a satellite jetty on the YUL site is not likely to cause significant adverse environmental effects.?? 

This decision is based on the following factors:?? 

• Mitigation measures that are technically and environmentally feasible 
• Community knowledge and consultation feedback
• Knowledge of and impacts on the rights of indigenous peoples

 

The main mitigation measures considered for this determination are as follows:  

Management of vegetation  

• Limit machine traffic and preserve existing vegetation.
• Clearly demarcate work zones.
• Stabilize soils in areas at risk of erosion and restore/reseed disturbed areas.
• Avoid storing materials on vegetation to be preserved.

  Management of invasive alien species (IAS)  

• Excavate soils containing invasive species and dispose of them in an authorized landfill.
• Clean machinery before/after working in at-risk areas.
• Use IAS-free seed and fill.
• Inspect soils before re-use.

  Protection of flora and fauna  

• Avoid work (clearing, vegetation control) during the nesting period (mid-April to the end of August).
• If work is carried out during this period, a qualified biologist must carry out a prior inspection to check for nests.
• If active nests are present, establish a protection zone and wait for the nesting period to end before resuming work.
• Comply with Environment Canada's Guidelines to reduce risks for migratory birds.
• Do not damage areas where milkweed plants have been observed.
• Check for the presence of species of special status and apply the relevant regulations.

Protection of water environments  

• Carry out work in dry conditions.
• If fish are present, they must be relocated by a professional before work begins in the relevant area (permit required).
• Do not riprap the shoreline.

Protection of surface and ground water  

• Divert runoff to sediment capture devices before discharging it to sewers or ditches.
• Protect waterways, ditches and sewers from the discharge of contaminants.
• Install and maintain sediment control measures (e.g. barriers, berms and basins) throughout the construction period and ensure their continued effectiveness during floods, periods of heavy rainfall and frost.
• Carry out stripping in such a way as to minimize erosion.
• Respect all applicable environmental regulations in work methods. 
• Supply vehicles and equipment and manage hazardous materials at least 30 metres from watercourses and ditches. 
• Ensure the decontamination and/or external disposal of contaminated groundwater where applicable. 

Prevention of contamination and spills  

• Install watertight drip trays under small hydrocarbon equipment.  
• Inspect and empty bins after each rainfall.  
• Use biodegradable oils for equipment within 30 metres of a watercourse.  
• Develop and implement an Environmental Emergency Plan (EEP).  
• Have spill kits available at several locations on site.?? 
• Ensure the presence of an experienced environmental supervisor during work in or near water environments.  
• Inspect machinery regularly to prevent leaks.  
• Refuel before entering the site, if possible.  
• Use mobile tanks that comply with refuelling standards and regulations.  
• Have oil recovery kits available in all work areas.  
• Display and apply emergency procedures in the event of an incident.  

  Management of contaminated soil and excavated materials  

• Carry out the environmental characterizations required for proper soil management.?? 
• Develop and implement an excavated soil management plan that complies with all relevant directives, laws and regulations (MELCCFP, CCME, ADM).  
• Segregate, cover, store and transport contaminated soils in accordance with applicable regulations.  
• Evaluate soil reuse according to current quality criteria.  
• Use Traces Québec to monitor soils exceeding "A" criteria.  
• Control the dispersion of drilling muds.  
• Manage concreting water and dispose of it at an authorized site.  

  Air quality?? 

• Maintain and water unpaved roads and dry material piles.  
• Limit speed on site to 10 km/h.  
• Apply gravel to high-traffic areas.  
• Interrupt work in strong winds if dust cannot be controlled.  
• Avoid idling engines.  
• Maintain machinery and anti-pollution systems in good condition.  
• Reduce the movement of vehicles and machinery.  
• Promote the use of electrical equipment and green technologies.  
• Install dust collectors in the concrete plant.  

  Soundscape  

• Implement a soundscape management plan for the entire duration of the construction work.  
• Use less noisy work methods.  
• Position fixed equipment behind natural or artificial screens.  
• Avoid rattling rear panels during unloading.  
• Maintain equipment and check mufflers/catalysts.  
• Reduce reverse maneuvers; use white noise back-up alarms.  
• Limit traffic to defined roads.  
• Follow the manufacturer's recommendations for maintenance of noise sources (e.g. fans).  
• Raise staff awareness of noise issues.  
• Carry out regular noise monitoring.