English Abstract The revision of the Soil Clean-up Guideline in the
Netherlands requires a sound toxicological base for the criteria to be set
in case of soil pollution in relation to possible measures to be taken. The
report describes the starting points and assumptions generally taken into
account in preparing a risk assessment for humans after exposure to
chemicals. Direct and indirect exposure are distinguished as well as the
oral, dermal, and inhalatory route. To derive the C- (testing) values in
the Soil Clean-up Guideline special attention has to be given to ingestion
of soil particles, soil contact, inhalation of air, consumption of crops,
and consumption of drinking water. Furthermore a distinction is made
between substances with and without a threshold value.
