Abstract
This study examined the measures of risk reduction in industrial plants in the processing stage of metal working which are the main sources of short chain chlorinated paraffins (SCCPs). First, the methodology of species sensitivity distribution was used for derivation of environmental quality criteria, and a hazard concentration (HC5) for aquatic organisms was calculated. Next, this study identified release and transfer factors of SCCPs for the stages of the life-cycle from metalworking plants to freshwater via sewage treatment plants, and calculated annual usage of an industrial plant which might cause adverse effect on aquatic organisms. Then, this study proposed the procedure of risk reduction measures, and analyzed additional cost of the replacement of SCCPs with other compounds. As a result, it was revealed that industrial plants which use 10t of SCCPs annually had to consider voluntary management, and the cost associated with replacement of SCCPs appeared to increase for metalworking.
