Entry to the Environment and Initial Distribution

Most of the known inputs occur either by direct volatilization to the atmosphere from production and use sites (including land disposal of solid residues), or by discharge in effluents to surface waters. Depending on their relative volatility, individual compounds will either preferentially evaporate to atmosphere, or be rained out back into surface waters. It is possible to calculate a theoretical partition coefficient 

There is some evidence from field observations that even the lower MW chloro-carbons show some tendency to adsorb on solids [43, 55] but this has not been quantified in laboratory studies. 

It may be concluded that the atmosphere is the major pathway to be considered [16]. 

---