Prior to the planning and implementation of remediation strategies, it is of particular interest to develop a model that displays as precisely as possible the lithological conditions and the spatial distribution of the contamination.

Thus, the objective of the site investigation is a 3-dimensional characterisation of the site. Direct-push based survey delivers a high number of data deriving from in-situ measurements and samplings. The complete site characterisation system applied by geo-log is based on the technology of Fa. Geoprobe® Systems, Salina, USA.

The basis for the 2- and 3-dimensional interpretation is the knowledge about spatial structures of site-specific variables that can be investigated via variography. It is of particular interest that the spatial continuity of the parameters can be presented also for not investigated spots. For this approach, the software tool GSLIB is particularly suitable with which the spatial correlation of the data as well as the modelling (calibration) of the observed data variance can be implemented. These geostatistical parameters are necessary for the creation of the spatial distribution of the target variable (lithology, contamination).

The objective of the geostatistical simulation is the realisation of the variables that show the same variability as those deriving from measurement. The data is imported into the simulation software RockWorks 2006 (RockWare, Golden, USA) that allows a simulation of investigation site by means of the existing values of the target variable (field data) and the calibrated geostatistical parameter. for the demonstration of the spatial distribution of the heterogenity, contour maps, cross sections and 3D-block models of the investigation site can be created.