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The City of Lévis tasked gbi with refurbishing the filters in Charny’s drinking water production plant and with repairing the drinking water reservoirs.
The work included: the replacement of four filter bottoms and selection of the appropriate technology through the pre-purchasing of equipment; the installation and commissioning of the filter bottoms; the replacement of the filtering media; the structural assessment of, and repairs to, the concrete; as well as repairs to the wash water gutters.
We also worked on preparing the concrete surfaces and waterproofing the filters with a membrane certified NSF61 for drinking water, the replacement of the air wash supply valves and asbestos removal work. We were also tasked with carrying out electrical and control work, as well as commissioning and training.
Among the project’s specific features were serious problems related to the watertightness of the filters and reservoirs, as drinking water production had to be continued while the work was being done. In fact, it was essential that the work be done in phases in order to keep disruptions in plant operations to a minimum, in terms of both the quantity of water produced and its quality, and to comply with the standards set out in the Regulation Respecting the Quality of Drinking Water.
Note that the construction work required interventions on the part of the plant’s operations staff in collaboration with the contractor.