Local Scale Dispersion Calculation Presented on the following slides is an example of how to apply many of the concepts learned in the Pollutant Plume Simulation PowerPoint to a small scale emergency response application. Try to setup and run the model without viewing the additional slides, however if you have difficulty the additional slides will take you step by step through the setup. It is recommended to click on the Reset button of the main HYSPLIT menu before proceeding in order to clear out any old cases in the working directory. Note: These runs were produced using HYSPLIT version 4.9 (released January 2010). Slight differences are possible with older/newer versions of the model. 4-2 PC-HYSPLIT WORKSHOP