Kartotrak allows Dekra to justify undoubtely their conclusions
Problematics
“Our work is to provide our clients with the elements of decision they need to prepare site management plans for future remediation. Before we decided to include geostatistical approach in our projects, we were used to produce contamination maps based on very simple interpolation methods and empirical calculations. We needed a rational solution which enabled us to justify undoubtedly our conclusions.”
National Technical Manager, Polluted Sites and Soils at Dekra Industrial France, Damien Faisan explained.
Example of a contamination map without the geostatistical approach, not much realistic
Solution
Damien Faisan was already convinced of the relevance of geostatistics to answer its needs of rationality. He chose the software solution Kartotrak because, he said, it is an easy to learn and to use software which perfectly works together with the GIS used at Dekra Industrial France in their studies.
Thus, Kartotrak lets his team:
– Compile, clean and homogenize data;
– Map contamination in a more detailed and realistic way, geostatistics (and interpolation by kriging) allowing to take into account the spatial behavior of the pollutant(s).
– Establish probability maps indicating where it is more certain to find the expected level of pollution;
– Quantify the polluted volumes with the associated uncertainties;
– Display the contamination models and surveys in the same 2D or 3D view.
Example of a probability map indicating zones where the certainty to find the estimated level of pollution is the highest
At Dekra Industrial, Kartotrak is today used for projects with high stakes and for which the need to secure prescriptions is essential. Nevertheless, the methodology related to site studies is in constant evolution, this means that the use of geostatistics in the projects will tend to expend.
Kartotrak delivers maps which immediately allow identifying the most polluted zones or the much less sampled.
Financial risks controlBecause the calculated polluted volumes are systematically associated with a level of uncertainty, Kartotrak enables to assess the margin of error associated to the remediation budget and to secure it.
Decision based on sound informationKartotrak allows Dekra Industrial to provide their clients with probability maps of occurrence of a given level of pollution. Thus, decisions are fully informed.
Example of (1) a site contamination mapping by kriging, (2) mapping of the probability of contamination
With geostatistics, results obtained are based on opposable scientific basis, which makes possible any counter-expertise.
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