Predicted environmental impacts of undertaking and proposed mitigation measures:
Interactions: Construction activities have the potential to temporarily increase ambient air concentrations of dust (i.e., particulate) and greenhouse gas emissions.
Effects: During construction activities, there will be an increase in local airborne particulate (dust) and tailpipe (fuel combustion) emissions from the operation of heavy-duty equipment. The tailpipe emissions will include greenhouse gas emissions and therefore have the potential to contribute to climate change. These effects are typical of a construction site, localized, and of a temporary nature.
•Optimize fuel consumption and minimize dust production resulting from vehicle/equipment travel: Employ standard operating procedures for equipment/machinery and ensure that regular maintenance is performed in accordance with good engineering practices or as recommended by suppliers such that the equipment is kept in good operating condition. Other activity-specific mitigation measures will include the use of appropriate exhaust emissions controls such as catalytic converters and diesel particulate filters to mitigate fuel combustion emissions from heavy equipment and vehicles. Additionally, the number of equipment/vehicle movements and travel distances will be optimized to reduce fuel consumption and minimize dust and greenhouse gas emissions. Lowering vehicle speeds on unpaved road surfaces, applying water as well as implementing good road maintenance practices will minimize the potential for road dust emissions. All work will be completed by methods that minimize dust generation from operations.
•Reduce dust resulting from construction activities: Execute work using methods to minimize raising dust from construction activities. Implement and maintain dust and particulate control measures as determined necessary by applicable regulations and standards construction and in accordance with applicable authorities. The use of oil for dust control is prohibited. Prevent dust from spreading to beyond the immediate work area. A Departmental Representative or designate may stop work at any time when Contractor's control of dusts and particulates is inadequate for worker exposure, or when air quality monitoring indicates that release of fugitive dusts and particulates into the work area equals or exceeds specified levels. If Contractor's dust and particulate control is not sufficient for controlling dusts and particulates into atmosphere, work must be stopped immediately. Contractor must then discuss and implement procedures to resolve the problem. Make all necessary changes to operations prior to resuming work that may cause release of dusts or particulates. Prevent sandblasting and other extraneous materials from contaminating air beyond application area, by providing temporary enclosures. Cover or wet down dry materials to prevent blowing dust and debris. Provide dust control for temporary roads.
Interactions: Construction activities have the potential to temporarily increase ambient noise.
Effects: During construction, there will be an increase in noise emissions from construction equipment operation and construction activities. These effects are typical of a construction site, localized, and of a temporary nature. The physiological and ecological impacts of noise on wildlife needs to be considered, acutely loud noises can cause hearing loss in wildlife; behavior patterns of wildlife may differ from their natural suite of behaviors.
•The Project will employ standard operating procedures for equipment/machinery and ensure that regular maintenance is performed. As well, personnel will adhere to conditions outlined in all permits, authorizations and/or approvals.
•The number of equipment/vehicle movements and travel distances will be optimized to reduce fuel consumption and minimize noise emissions. Lowering vehicle speeds on unpaved roads as well as implementing good road maintenance practices will minimize the potential for noise emissions. Steps will be taken to ensure that all heavy construction equipment are equipped with proper mufflers to reduce noise levels.
Interactions: Construction activities may result in effects to surface and bedrock geology.
Effects: The Project is located in areas of continuous permafrost with a varying active layer dependent on location. Installation, use and removal of temporary camps can expose the underlying permafrost, resulting in melting, ground instability, and soil erosion.
•Effective sediment and erosion control measures will be installed prior to starting work to prevent entry of sediment into watercourse and waterbodies. These measures will be inspected daily and repaired if damaged by construction, precipitation, or snowmelt. Sufficient supplies for erosion, sediment, and drainage control will be available on site to keep in compliance with federal and territorial fisheries and environmental protection legislation.
•The temporary work camps will be installed on cribbing, and/or raised foundation, as best as possible. This is so that heat generated in the camp may be allowed to dissipate in the air space underneath the structures. This will decrease heat exchange and heat loss. These measures will minimize potential negative effects to permafrost in the worker camp area.
Sediment and soil quality
Interactions: Construction of temporary camps have the potential to affect the soil including removal of infrastructure, material handling (loading and dumping); and the refueling of vehicles/equipment.
Effects: During construction activities, soil quality is most likely affected as a result of fuel spills and leaks from equipment refueling efforts or otherwise, and from compounds located inside the materials of existing infrastructure. Conduct a complete on-site evaluation of the area to determine exact measures to be taken to protect permafrost.
•Prevention of fuel spills/leaks: Refueling of vehicles and equipment to occur in designated areas following all applicable regulations and implementation of standard operating procedures for fuel transfers.
•Sediment, erosion and drainage control: Effective sediment and erosion control measures will be installed prior to starting work to prevent entry of sediment into watercourses and waterbodies. These measures will be inspected daily and repaired if damaged by construction, precipitation or snowmelt. Sufficient supplies for erosion, sediment and drainage control will be available on site to keep in compliance with federal and territorial fisheries and environmental protection legislation.
•Measures will be taken to ensure temporary worker camps are restored to original conditions when they are dismantled, such as total removal of all camp structures, cleanup, and ensuring minimal soil and permafrost disturbance. At the completion of the construction projects the temporary camp complexes will be removed and transported back to Eureka station for final demobilization. The sire will be cleared of debris and non-burnable garbage will be hauled and disposed of in a local landfill. Food waste will be incinerated, and dangerous goods will be placed in drums labelled appropriately with Transportation of Dangerous Good (TDG) and DFO requirements for demobilization.
Interactions: Construction activities have the potential to affect the hydrology and water and sediment quality of the site. These activities include, removal of infrastructure, material handling (loading and dumping); and the refueling of vehicles/equipment.
Effects: surface water contamination could potentially occur due to leaks/spills that may occur during the re-fuelling of vehicles and construction machinery on site. Surface drainage from the construction activities could result in the deposition of sediments in the aquatic environment.
•Suitable erosion and sediment suppression measures will be implemented to prevent sediment from entering Black Top Creek, Station Creek, or other water bodies. Erosion control structures (temporary matting, geotextile silt control filter (curtains) fabric, etc.) are to be used. Vehicles/machinery are to be checked for leakage of lubricants or fuel and are maintained in good working order. Re-fueling should occur in designated areas only. Basic petroleum spill clean-up equipment will be kept on-site. Barriers will be required during extraction of contaminated soils to prevent material from entering surface water, Station Creek or the reservoir. Contractors must develop a Fuel Spill Management Plan that includes, but is not limited to:
oroles and responsibilities of intervening personnel;
oa communication plan for operational personnel and regulatory agencies;
oresponse technique for various types of spills; and,
•Fuel will be stored in double wall containment capsules at designated areas.
Interactions: The construction work does not involve direct disturbance of the water bodies. Work projects are isolated from the water bodies, although movement of heavy equipment may increase sediment transport during the summer construction period.
Effects: Concerns about sediment loading in nearby water bodies are important to address.
•Best practice is to mirror aquatic environment mitigations. Should water pulling be required during the construction period, the most appropriate time of year to do so would be during the freshet period.
•All water intake hoses will be equipped with a screen of an appropriate mesh size to ensure fish are not entrained. Water will be withdrawn at a rate such that fish will not become impinged on the screen.
•Sediment and erosion control measures will be implemented prior to and maintained during water intake operations to prevent entry of sediment into the water.
•Fuel will be stored in double wall containment capsules at designated areas.
Vegetation Communities and Species
Interactions: Physical damage to vegetation during construction and changes in the soil surface layer, leading to potential soil and permafrost erosion, changes in surface water hydrology, and thermokarst. Fugitive dust may also suppress plant growth within a zone around construction zones.
Effects: The effects to the plant community are difficult to predict due to the lack of site-specific data on plant species and their density near the project component sites. The damage to the vegetation will be equal to the footprint of the construction, waste storage, and the dust footprint.
•Due to the extreme conditions at Eureka, construction will be conducted during the brief summer months. Damage can be reduced by covering the ground, possibly using matting, prior to construction to reduce physical disruption of the soil. Fugitive dust can be suppressed at its source. Additionally, vehicles will remain on pre-established roads/trails. Workers are to be advised of sensitivity of environment and limits of equipment travel will be determined.
Wildlife Communities and Species
Interactions: Construction activities will occur during the summer, the time that nesting and denning occur for many bird and mammal species. For birds and mammals, the interactions include behavioral changes such as avoidance and/or attraction to the site and changes in the dominant species in areas adjacent to the site.
Effects: Effects are unlikely as construction activities will keep to areas of existing buildings and established roads, or will be in areas that have already been previously disturbed. However, minimization of impacts is important as the area in general has the potential for sensitive species migration.
•The Wildlife and Wildlife Habitat Management Plan (SLR, 2018) will be followed.
•Temporary workers will be informed of station protocols for the control and disposal of food and refuse to ensure that local wildlife is not attracted to the site.
•Temporary workers involved with construction activities will be trained to avoid contact with all wildlife and their nests (particularly with species at risk) and to report sightings to a central authority (i.e., supervisors) immediately. Movements of workers in off-hours should also be restricted to ensure nesting sites and denning areas are not disturbed.
•Site personnel will use trained wildlife monitors prior to, and during construction to ensure a coordinated, appropriate response to wildlife sightings and to ensure protection of local species during construction.
•In the event that SARA listed birds or mammals are located in the area, construction crews will be prepared to modify, or delay, activity that might harm the protected species. For example, if nests with eggs are located for a protected species, activity in the area might be delayed until after hatching.
Socio-Economic and Human Environment
Interactions: The Project activities have the potential to affect components of the human environment and socio-economic environment.
Effects: The upgrading of antiquated infrastructure have the potential to create a net positive socio-economic affect for the HAWS main site at Eureka, facilitating ease of transportation around the site and updated infrastructure for enhanced personnel use.
•All workers must wear clothing that covers arms and legs, as well as gloves and boots, and any other appropriate personal protective equipment (PPE).
||Sewage lagoon sedimentation
||Decant into Slidre Fjord
||Contained in holding tanks and released to the environment pending receipt of acceptable weekly lab test results. Kitchen will be provided with grease traps.
|Sewage (human waste)
||Residual ash waste from incinerator is 400 lbs.
||Pacto toilets will be provided to handle black water waste which will be incinerated on site
||120, 205 L empty and damaged steel barrels
||Barrels crushed in lined drum crushing area prior to disposal on site. Testing to occur to determine if hazardous. If hazardous barrels disposed of offsite at approved hazardous waste facility
||Disposed of on-site in non-hazardous solid waste facility. Shipped offsite for disposal if hazardous.
||200, 205L barrels of solids sludge from fuel tanks
||Disposed of off site at licensed hazardous waste facility
||7m3 of painted wood from Tank Farm Upgrades and Repairs
||Testing of paint is to occur to determine if hazardous. If hazardous, painted wood will be disposed of off-site at approved hazardous waste facility.
||Disposed on-site in proposed non-hazardous solid waste facility
||100 m3 from Program of Works
||If Hazardous waste is identified during the design stage, it will be disposed of offsite at approved hazardous waste facility
||Reasonable efforts will be made to recycle where possible. Inert material will be disposed of onsite at the proposed non-hazardous waste disposal site
||4 m3 of mixed metals from tank repairs
||Testing of paint is to occur to determine if hazardous. If hazardous, mixed metals will be disposed of off-site at approved hazardous waste facility.
||Recycle, reuse , or dispose of on-site in proposed non-hazardous solid waste facility
||40000 Litres or Food and Paper Waste
||Ashes deposited in proposed non-hazardous waste facility and capped
||Incinerated on site
||5000 lbs from Temporary Camp Activities
||ashes deposited in proposed non-hazardous waste facility and capped
||Incinerated on site