1887

Development of criteria for acceptance of monolithic waste at landfills

image of Development of criteria for acceptance of monolithic waste at landfills

A Nordic study has been carried out to develop a methodology for the setting of criteria for acceptance of monolithic waste at landfills in accordance with the requirements in the Council Decision 2003/33/EC, to recommend appropriate methods to test monolithic waste and to propose associated criteria/limit values for acceptance of monolithic waste at landfills. This report contains the main conclusions of the study. The study was financed by the Working Group for products and waste (The PA-group) under the Nordic Council of Ministers.

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Approach

Although the Council Decision (2003/33/EC) refers to monolithic waste, the term “monolithic” has not been defined in the Council Decision or in the Landfill Directive. As described below, “monolithic” is not a very precisely defined property. Generally, “monolithic waste” has been perceived as waste occurring as large blocks or large coherent masses of concrete-like material of substantial strength and very low permeability (this is consistent with the reference in Article 6 (c) of the Landfill Directive to solidified and vitrified waste). It has implicitly been assumed that the concentration of contaminants in the leachate from “monolithic waste” in a landfill would be controlled by the release rate (often the rate of diffusion), and that a so-called tank leaching test would be the appropriate method for determining the rate of release of contaminants as a function of time (mg/s/m2 of surface area).

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