Base liner equivalency assessment for landfill sites

The EPA in a number of states in Australia has a set of minimum requirements for landfill liners. The performance of a number of alternative liner systems have been modelled and assessed against the required performance of the minimum requirements liner systems, to propose alternative liner system at a number of landfill sites in Australia. The equivalency has been assessed in terms of advective and diffusive flow through the liner and subgrade materials to demonstrate an equivalent or lower risk to the underlying groundwater. The assessments looked at sensitivity of material properties to demonstrate variations with respect to various parameters, which is presented in terms of different site conditions and selected construction materials.