clear and value-free description of the situation of a site,
including location and dimension of the contamination,
historial use, actual land use, geological, hydrogeological,
natural conditions, type, amount and distribution of existing
contaminants, factors influencing the migration of contaminants.
During site investigation all relevant information needed
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for a complete assessment has to be gathered and reviewed.
Of particular interest should be the site’s physical characteristics;
the physical and chemical characteristics of the potential
contaminants of interest; and the likely transport pathways.
Before fieldwork begins available information about the
area of interest should be obtained and reviewed. The information
gathered is used to establish a conceptual site model. A
number of recent technological developments have encouraged
the development of expedited site characterization approaches.