The NanoFASE model system will perform more complex, spatially-explicit simulations at smaller scales. It will simulate geographical area(s) as a network of cells. Within each cell, "reactors" will be linked by transport functions (e.g. sedimentation, deposition, effluent release, soil runoff, biota uptake). Implementation of material flow among cells (e.g. water flow, air movement) will enable multimedia transport modelling and fate prediction.