ROCKSTAR is a multi-nodal geochemical model that can be applied to simulate up to 20 inter-connected compartments which can be waste rock piles, tailings, open pits, mines, and/or surface water bodes. A conceptual illustration of the application of this model is shown below:

The theoretical basis for ROCKSTAR is similar to that of ACIDROCK and URANTAIL; however, some of the intra-compartment detail has been simplified to allow for simulation of a much larger area, and to incorporate the simulation of the interaction (flow, mass transport) between the compartments. (Thuringia Ministry of the Environment/CIDA) The number of simulated species (metals, radionuclides, chemical constituents, precipitates and minerals) and the general capabilities of the geochemical model ROCKSTAR have recently been expanded to support our assessment of the flooding of an entire mining region, as part of our on-going work in Germany. This model can also be used to simulate the presence and/or addition of alkaline amendments (e.g. lime, fly ash).

SENES has also developed geochemical and physical algorithms for separate site-specific models that consider ammonia, cyanide, thorium and organics.