Aim of the project is the collection of data sets of solid material and groundwater physical and chemical properties for suitable host rocks such as claystone and various crystalline rocks. The data sets are stored in a database that compiles measured and already established and technically substantiated reference values from different data sources (databases, scientific publications) worldwide. Statistical variance, localisation and assignment to a certain geological unit are included. However, the main focus is on host rocks that have been investigated in Germany and surrounding countries like Belgium, Switzerland and the Scandinavian Countries.
The derived reference data sets will be used in Step 2, Phase I of the site selection procedure due to legislation of the StandAG to evaluate the geological units of an area of interest. A lack of measurement data is to be expected for many of the areas to be assessed by the BGE, so that the reference data sets are of great relevance for the representative preliminary safety investigations (rvSU). In the case that for an area-specific evaluation no or too few specific measured values are available parameter models have to be developed in order to approximate the site-specific properties. The aim of the rvSU is to be able to differentiate between subunits within a host rock type and within an investigation area. Thus, it should not only be possible to derive generalised reference data sets for the host rock type but also to provide differentiated value ranges based on the geological context.