A dispersion model has been developed for pollutant discharges from the Buccaneer Oil Field in the Gulf of Mexico. The model requires input data for subsurface currents, wind speed and direction, platform geometry, pollutant source strength, and particle size distribution, at regular time intervals. The distributions of floating, sinking, and vertically mixed pollutants are calculated separately. Output from the model includes graphs which show the growth of the turbulent wake downstream from the platform, the change in pollutant concentrations over time and distrance transported, trajectories of floating and subsurface pollutants, and settling times for particles of various sizes.