The landfill at ENRMF is designed and operated as a containment landfill in accordance with modern standards. It is engineered in such a way that the waste deposited is contained within cells formed of low permeability materials. This barrier system provides the necessary protection of human health and the environment.
Each cell is constructed with base and side wall lining systems formed of a combination of a low permeability engineered clay mineral liner and a geomembrane liner. The cell construction is designed to prevent contamination of ground and surface water that may be harmed by the migration of landfill leachate. Each cell contains leachate and landfill gas collection and monitoring infrastructure.
Once a landfill cell is completed it is sealed with a low permeability capping layer to minimise rainfall entry into the landfill and so control rates of leachate generation. The low permeability capping layer is keyed-in to the low permeability side wall lining system to provide a continuous low permeability protective barrier.
The design of the site containment system is subject to approval by the Environment Agency in accordance with the Environmental Permit. The construction and engineering of landfill cells is carried out by specialist contractors overseen by a Construction Quality Assurance engineer. The cell lining and capping system is subject to testing at every phase of construction to confirm that the design specifications have been met, and that it will form the necessary protective barrier in an effective way. Once construction is completed a report detailing the construction method, testing and laboratory results is submitted to the Environment Agency for approval before waste can be placed in the cell.