Abstract
Seepage control performance of management type sea disposal facility is regulated based on the knowledge from analyses for land disposal site. For that reason, we set up study cases considering characteristics of disposal site in the sea area and characteristics of input waste, and analyzed the risk to human health etc., which substances in sea disposal facilities will outflow. As a result, in this study range, we showed that there is a possibility that a considerable safety against human health etc. is secured even if the permeability coefficient of seepage control works is relaxed. However, because mechanism of risk varies from facility to facility and more realistic studies are necessary, further studies are necessary. And, those show that it is more reasonable to design seepage control performance of sea disposal facility by evaluating risks for each site.
