Pollutants released to the environment are distributed among the many
environmental media such as air, water, soil, and vegetation, as the
result of complex physical, chemical and biological processes. The
possible environmental impact associated with chemical pollutants is
related to their concentration levels and persistence in the various
environmental compartments. Therefore, information regarding the
migration of pollutants across environmental phase boundaries (eg.,
air-water, soil-water) and their accumulation in the environment is
essential if we are to assess the potential environmental impact and the
associated risks. In recent years it has become apparent that
environmental pollution is a multimedia problem. Risk assessment and the
design of appropriate pollution control measures require that we
carefully consider the transport and accumulation of pollutants in the
environment. We are now recognizing that the environment must be
considered as a whole, and the scientific and regulatory approaches must
consider the interactions of environmental media. It is also becoming
apparent that single-medium approaches are partial and often
counter-productive. On the other hand any multimedia program must
carefully consider the rate of each environmental medium in the overall
multimedia scheme.