English Abstract On May 7, 1991 a workshop on 'In-situ soil remediation
techniques' was organized by the Laboratory for Waste Materials and
Emissions of the National Institute of Public Health and Environmental
Protection and the Netherlands Integrated Soil Research Programme. The aim
of the workshop was to make an inventory of the problems related to the
development of in-situ soil remediation techniques and to discuss the
desired research strategy in this field. About 35 people from research
institutes, consultancy agencies, soil remediation companies and government
service were invited to participate in this discussion. The workshop
concluded that technical problems, which frustrate the further development
and optimalization of in-situ remediation techniques, are related to soil
heterogenity and the spatial distribution of the contamination. This
heterogenity hinders the monitoring of the remediation process and the
assessment of the final situation. A thorough preliminary inquiry of the
location may diminish the negative effects of heterogenity. To achieve
better control and optimalization of the process, simulation models,
sampling strategies and procedures for extraction and analysis should be
further developed and/or standardized. Focal points for each in-situ
remediation technique have been defined as a guide to future
research.
