## 3 Results and Discussion  
The results of this study are based on the optimised workflow framework developed for the updated environmental engineering tests with adjusted binder proportions. The study resulted in evaluated properties of soil obtained during the following workflow:  
* The soil samples were collected from the Kongshavn Harbour, Port of Oslo; the representative soil specimens were excavated from different locations (test sites) and placed in containers for further soil treating in a batchwise mode.
* The soil was homogenised using a surface mixer and stabilised with various combination of binders (cement/slag) tested experimentally. The soil samples were cropped and trimmed in leach piles to a defined height of specimen to minimise the workflow; unnecessary parts were subtracted from the samples using piles.
* The permeability of soil was analysed using a permeameter device according to the method SGI No. 15, and compared with optimal parameters for several specimens; the temperature and humidity conditions were maintained in the laboratory.
* The immobilisation of the environmentally critical contaminants was performed through leaching with evaluated concentrations of seven types of heavy metals, PAH, PCB, and TNT. The dynamics of leaching speed and value was recorded and evaluated for 6 h to 64 days with labelling of soil leaching over the defined time intervals.
* The obtained data were recorded for statistical analysis and computer-based modelling. The dynamics of concentration of the contaminants in soil was modelled on the graphs. The behaviour of soil was evaluated using intervals through repetitive soil sampling in laboratory SGI.
* Statistical correction of the outliers caused by biased sampling was performed in the dataset to obtain statistically sound results.
* The prognosis of leaching behaviour was numerically modelled using the developed equations and statistical data analysis. The comparison of the achieved levels of pollution and leached contaminants were compared on the original (background) level to estimate the degree of contamination for environmental risk assessment.  
The presented workflow of soil treatment enabled the processing of samples of soil specimens in soil samples collected from Kongshavn, Port of Oslo, southern Norway. The experiments resulted in evaluated dynamics of leaching and permeability over time of 64 days. The data were extracted form prognosis modelling for one year based on the computer-assisted statistical analysis. The trends in dynamics of contamination were evaluated over time and compared against the original (background) levels of contaminants.  
Using the optimised techniques, we tested different experimental conditions, as follows. In separated batches of soil, different ratios of binders were used to estimate their effects on soil quality (BCSA cement/slag); different ratios of water amount to binder amount and the water binder number (vbt) were evaluated. The permeability and leaching of soil data were tested on six cases to achieve a statistical soundness of the results. The numerical experiments and statistical data processing were performed to derive the average and standard deviation on the measured data. The experiments have shown the importance of exploiting the diverse binder combinations for improving soil properties through stabilization/solidification and leaching. The non-linearity of the permeability and leaching behaviour of soil were evaluated with regard to binder content used for soil stabilization.