Abstract
This paper presents the free swell and the hydraulic conductivity of geosynthetic clay liners (GCLs) permeated with organic chemical solutions of 1,4-dioxane and bisphenol A. The concentration level which deteriorates their swelling capacity and barrier performance was approximately more than 10,000 ppm for the permeation of singlecomponent 1,4-dioxane or bisphenol A solution. It was concluded that waste leachates in Japanese landfills do not have a potential to deteriorate the barrier performance of GCLs because the total organic carbon concentration of the waste leachates are as low as 100-1000 ppm.
