TA Luft

Germany has an air pollution control regulation titled "Technical Instructions on Air Quality Control" ("Technische Anleitung zur Reinhaltung der Luft") and commonly referred to as the TA Luft.
The first version of the "TA Luft" was established in 1964. It has subsequently been revised in 1974, 1983, 1988 and 2002. Parts of the "TA Luft" have been adopted by other countries as well.
In 1974, 10 years after the "TA Luft" was first established, the German government enacted the "Federal Pollution Control Act" ("Bundes-Immissionsschutzgesetz"). It also has subsequently been amended a number of times, the last of which was in 2002. Although the first version of the "TA Luft" existed 10 years before the enactment of the "Federal Pollution Control Act", it is often called the "First General Administrative Regulation" pertaining to the "Federal Pollution Control Act".
The German government created the Federal Ministry for Environment, Nature Conservation and Nuclear Safety ("Bundesministerium für Umwelt, Naturschutz und Reaktorsicherheit") in June, 1986 and it is now responsible for implementing the "TA Luft" regulation under the "Federal Air Pollution Control Act".
Overview.
The TA Luft is a comprehensive air pollution control regulation that includes:
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.