Laboratory and field toxicity tests are often included
also. Different lines of evidence areweighed and based on the evidence,
the risk of studied contaminants in the environment is determined. It
is a flexible method, and WoE approach can be assembled individually
to each studied subject area. WoE approach is suitable in comprehensive
risk assessments, because evaluation of all the available
data is by definition required (EPA, 1998), and it has been applied
successfully in various subject areas