the collection and analyses of soil, water, air, building
samples as well as geological, hydrogeological, and hydrological
data. Sampling is to describe the contamination, the soil,
and the groundwater to such an extent that risk analyses
may be carried out, and so that there is an adequate foundation
for planning and executing necessary remediation. Analysing
soil and water samples is to identify the degree of contamination
in the area being investigated. The collection depends
entirely on the result of the initial survey as well as the
requirements for the data which are to be used in connection
with the subsequent risk assessment.
In site investigation sampling as well as physical and chemical
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analysis are required to:
- Determine nature and extent of existing contaminations,
- Estimate fate and transport of contaminants of concern,
- Characterize exposure pathways of concern.
Appropriate tools and methods are selected according
to data quality levels, which shall be achieved by the site
investigation. These quality levels are defined in a data
quality objective plan.