–Predictor-corrector advection scheme
–Linear spatial & temporal interpolation of meteorology from external sources
–Vertical mixing based upon SL similarity, BL Ri, or TKE
–Horizontal mixing based upon velocity deformation, SL similarity, or TKE
–Puff and particle dispersion computed from velocity variances
–Concentrations from particle-in-cell or top-hat/Gaussian distributions
–Multiple simultaneous meteorology and/or concentration grids