Site investigation
Site investigation describes the process of carrying out 
investigations on land to determine whether there is contamination
present and to collect sufficient, suitable data for the
purpose of risk assessment. The investigation is normally
carried out in several stages. These stages range from a
desk study and simple visual inspection to full intrusive
investigation using trial pits and boreholes etc and the
sampling and analysis of materials.
The site investigation focuses on confirming whether any 
contamination exists at a site, locating any existing contamination,
and characterizing the nature and extent of that contamination.
It may include the analysis of samples of soil and soil gas,
groundwater, surface water, and sediments. The examination
of contaminant migration pathway is as integral part of
site investigation as a baseline risk assessment may be
needed to calculate risk to human health and the ecosystem.
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