Within the framework of safe disposal of high and intermediate level radioactive waste, it is
well known that for both the Boom Clay and overlying Eigenbilzen Sands (early Oligocene;
Rupelian), the composition varies with depth. Though, a detailed understanding of how
these intrinsic variations may affect the basic transport properties is still missing. Therefore, a
small but comprehensive and unique data set, containing transport parameters (hydraulic
conductivity and diffusivity) and related properties (mineral composition and texture, grain …