Hydrocarbon spills can contaminate soil with e.g. phenantrene or naphtalene. Microorganisms can be used to metabolise or co-metabolise pollutants to perform a clean-up. The Pace determining step are usually diffusive processes in the soil grains. Loading and washing/unloading of soil samples can serve to identify diffusion and sorption parameters which in turn will permit to simulate bioremediation progress. At Wavedyne.com we have a 10+ years track record in coding such simulations and associated graphical user interfaces.