oil refining, plastics, food, and others. Annex 3 is devoted to guidelines on: how the atmospheric dispersion modeling required during the TA Luft review is to be performed, and the acceptable type of dispersion model to be used. In essence, the modeling must be in accordance with the VDI Guidelines 3782 Parts 1 and 2, 3783 Part 8, 3784 Part 2, and 3945 Part 3. The full text of the TA Luft is available on the Internet. AUSTAL2000 AUSTAL2000 is an atmospheric dispersion model for simulating the dispersion of air pollutants in the ambient atmosphere. It was developed by Ingenieurbüro Janicke in Dunum, Germany under contract to the Federal Ministry for Environment, Nature Conservation and Nuclear Safety. Although not named in the TA Luft, it is the reference dispersion model accepted as being in compliance with the requirements of Annex 3 of the TA Luft and the pertinent VDI Guidelines. It simulates the dispersion of air pollutants by utilizing a random walk process (Lagrangian simulation model) and it has capabilities for building effects, complex terrain, pollutant plume depletion by wet or dry deposition, and first order chemical reactions. It is available for download on the Internet free of cost. Austal2000G is a similar model for simulating the dispersion of odours and it was also developed by Ingenieurbüro Janicke. The development of Austal 2000G was financed by three German states: Niedersachsen, Nordrhein-Westfalen and Baden-Württemberg. See also 2008/50/EG Air Quality Modeling Group Air Resources Laboratory AP 42 Compilation of Air Pollutant Emission Factors Bibliography of atmospheric dispersion modeling List of atmospheric dispersion models UK Atmospheric Dispersion Modelling Liaison Committee UK Dispersion Modelling Bureau References Further reading www.air-dispersion.com Official Web page. External links UK Dispersion Modelling Bureau web site UK ADMLC web site Air Resources Laboratory (ARL) Air Quality Modeling Group Error propagation in air dispersion modeling Air pollution Atmospheric dispersion modeling Environmentalism in Germany Law of Germany