For all model runs, the same source data are used (Table 4). Thesource is assumed non-buoyant, i.e. the effective stack height isequal to the physical stack height. Thus, possible differences betweenthe two models to treat buoyant plumes and their effect onthe dispersion do not show up in the results. As for the AODM andLASAT runs the same emissions and the same meteorological inputdata are used, the resulting separation distances depend on thedifferent model physics and differences in the attribution of OSP toatmospheric stability classes only.