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ENVIRONMENTAL MONITORING NETWORK OF LANDFILL SITES IN WALLONIA
ISSeP, “Institut Scientifique de Service Public”, is a public scientific institute mainly working on behalf of the Walloon government. Since 1998, ISSeP is managing the environmental monitoring network of landfill sites in Wallonia on behalf of the Department of Policy and Control. This network mainly includes MSW sanitary landfills and old dumpsites but also inert and industrial landfills. In this framework, ISSeP periodically controls landfill emissions and their environmental impact on the surrounding receptors (groundwater, surface water, ambient air quality, odour impact …).
In 2011, ISSeP started to develop and manage a landfill focused database including all the results of environmental monitoring around landfill (liquid matrices). The database is fed by ISSeP’s results but also (and mainly) by compulsory self-monitoring of landfill owners. It is used to provide statistics and to better understand the temporal evolution of the landfill environmental situation.
Since November 2015, ISSeP is also working on landfill aftercare thematic on behalf of the Walloon Government (DGO3 – Waste and Soil Department). Competent authorities asked ISSeP to perform a benchmarking on landfill aftercare and the existence of criteria allowing to cease the aftercare activities. ISSeP developed a risk-based approach for the assessment of aftercare completion. Beside this, ISSeP started to investigate on the opportunity to accelerate waste stabilisation into the waste body and how a sanitary landfill could be converted into bioreactors. This fits with a more sustainable landfill management philosophy. Part of this work, ie. the methodology aiming to asses aftercare completion or modification, has been submitted for approval to the Administration on February 2017 and presented on May 2017 to operators, competent authorities and experts. The methodology is now subject to a public inquiry (until September 15th).
ISSeP is also on the way to examine End of Waste criteria in view of the future Walloon legislation on this topic.