The program will prompt the user for the following data about a point source (units required in parentheses):

• Emission rate (g/s)

• Stack height (m)

• Stack inside diameter (m)

• Stack gas exit velocity (m/s) or flow rate (ACFM or m3/s)

• Stack gas temperature (K)

• Ambient temperature (K)

• Receptor height above ground, if any (m)

• Urban/rural option (explained in the User's Guide)

• Building downwash (building size in meters needed)

• Complex terrain: Use in cases where terrain elevations exceed stack height, as in a valley or near a mountain range.

• Simple elevated terrain: Use when terrain is higher than the stack base, but below stack height.

• Meteorology: You can choose to consider (1) all classes of meteorology and wind speed to find the worse case, (2) a single stability class at all wind speeds, or (3) a single stability class and wind speed; good for modeling a single incident under known conditions.

• Automated distance array: You can define the maximum and minimum distance the program considers. The program will calculate concentrations at incremental distances within the given range; and will also calculate the maximum concentration if it should fall outside this range.

• Discrete distance option: You can use this option to find pollutant concentration at a single point downwind.

• Fumigation: The program can calculate for conditions of inversion break-up fumigation and shorline fumigation.

...move on to see data for a Sample Problem

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