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One part of the project consisted of carrying out the final covering of cell 8 over approximately 26,000 m2, including the installation of biogas monitoring wells and the placement of granular materials and the clay liner. Another part of the project involved developing new cell 9 over 24,000 m2, with a multi-layer liner system using clay, as well as a leachate and stormwater drainage system. This portion also included levelling and land clearing work. The overall project also included the development of a 300 m2 leach field and a 10,000 m3 secondary leachate collection pond.
The project was completed within a 12-week schedule. Given the scope of the work to be done, coordination between all stakeholders was essential. Part of the draining of the peat leach fields had to be done manually. This meant more time and manoeuvring than was expected. As the Cacouna site is mostly made of clay, the biggest challenge was water resurgence produced during excavation and waterproofing of the cell. A temporary water collection pond had to be moved at the same time as the construction of cell 9.
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