The source characterization guidance was initially developed to assure consistency in the methodologies used by DNR staff to characterize emission sources in an air dispersion modeling analysis. In general the guidance addresses those emission sources modeled as pseudo- or non-point sources; however the guidance also addresses stacks with capped or horizontal type discharge. This guidance is not intended to preclude other methodologies for characterizing emission sources.

• Bin Vents (PDF File)
• Concrete Batch Plants (PDF File)
• Dump Pits (PDF File)
• Flare Guidance (PDF File)
• Flare Tool (XLS File)
• Grain Dryers (PDF File)
• Haul Roads (PDF File)
• Rain Caps and Horizontal Stacks (PDF File)
• Storage Piles (PDF File)
• Storage Tanks (PDF File)
• Truck or Rail Loadouts (PDF File)
• Volume Source Tool (XLS File)