A risk based decision making system for short time period actions

摘要

In the Flemish Region (Northern Belgium) the remediation of historically polluted soil (originated before 29 October 1995) only has to start following a governmental decision and after an explicit order by the Authority (Public Waste Agency of Flanders, OVAM). In case of new soil pollution (originated after 28 October 1995), soil remediation must be started as soon as soil clean-up values are exceeded. However, in both cases a relatively long period often goes between the first indication of a serious threat (orientating soil investigation) and the remediation works, possibly resulting in too high exposure of humans living or working on the contaminated site. A decision making system has been worked out to minimise actual risks in every stage of the soil investigation by evaluating restrictions in land use scenarios and land use possibilities or by taking preventive actions. The general aim is to minimise exposure until remediation starts.