A landfill is a system for the final treatment of waste. The landfills are located in big waterproofed orographic holes and contain waste disposal for many years. In this application it is essential to control the potential contamination of soil, groundwater and surface and the atmosphere (by leachate and gases or volatile waste), hence the extreme importance of the design and construction of the impermeable barrier system of both the vessel and capping when the installation reaches the end of his service life, drainage systems, leakage control, etc.. In all cases the choice of materials and installation is an important decission.

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