Tetra Tech worked with GFL Environmental to design a final cover and capture infrastructure for the biogas generated by the Pierrefonds landfill.
The Pierrefonds landfill had reached its full capacity and required a final cover as part of the permanent closure process. For more than 20 years, residential areas on the periphery had experienced severe odor problems due to inadequate biogas control. The odor significantly impacted the community, keeping residents from enjoying outdoor activities and severely reducing property values.
Benefits
- Development of safety protocol for closed landfill biogas management system
- Design of a real-time control system for surface water management
- Use of recycled material for the final cover and ditches
- Management and monitoring of imported soils to minimize costs
Our team designed a new system for collecting and combusting the biogas and a final cover using a linear low-density polyethylene (LLDPE) geomembrane over a surface area of 30 acres. We also designed a surface water drainage network of ditches and a retention basin with real-time control.
Tetra Tech performed construction oversight, project management during construction, and quality assurance, and prepared the required compliance and closure report. We also collaborated closely with government representatives to obtain an Environmental Compliance Approval and the Ministry of the Environment’s authorization to comply with regulations.
The project improved the community’s air quality, greatly enhancing the well-being of Pierrefonds residents.
