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n Civil Engineering = Siviele Ingenieurswese - World-class landfill cell at the Holfontein disposal site : environmental engineering
Jones & Wagener Consulting Civil Engineers (J&W) were appointed by EnviroServ Waste Management to design and supervise the construction of Cell 9 at the Holfontein H:H Disposal Site (Holfontein) in Springs, Gauteng.
The conceptual design commenced at a time when the Department of Environmental Affairs (DEA) were in the process of updating barrier standards from the present standards as described in the Department of Water Affairs and Forestry's Minimum Requirements for Waste Disposal by Landfill (Second Edition 1998) document. The Minimum Requirements do not stipulate double composite lining systems for waste cells, only for hazardous waste lagoons. The new Draft National Standard for Disposal of Waste to Landfill (Notice 432 of 2011) would place a landfill site such as Holfontein in the Class A category, which requires a double composite lining system.
A composite lining system is one in which a highly impermeable layer of either compacted clay material, enhanced soil or a geosynthetic clay liner acts together with a geomembrane liner placed in intimate contact with it to provide an impermeable system to infiltration of liquids.
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