The topic « Low permeable media » is already active as we are organizing an international benchmark of low permeability measurement with 30 research teams participating, among them fours partners from the GIS. This project is called « KG²B » which means K (permeability) for Grimsel Granodiorite Benchmark. Each lab received a sample of granodiorite from the Grimsel underground resarch lab in Switzerland for measuring its permeability with their preferred method.
More information can be found on the KG²B project web site (https://labo.u-cergy.fr/~kg2b/)