The air quality data used in the
AQ-Calc system consists of:
Air quality modeling
guidance requires either one year of on-site measured meteorological
data or five years of off-site data. The off-site meteorological data is
typically from the closest government or airport weather tower.
Receptors are locations on and around the
facility where the air quality models will predict impacts.AQ-Calc includes the ability for the user
to graphically select receptors as is seen in the figure
The sources database allows for entry of point,
area and volume sources.
The general information required for each stack is stack
location, stack height, stack diameter, stack temperature, volumetric
flow and pollutant emission rates.
database consists of pollutant chemical names and physical properties
for all chemicals that are used on-site
database includes the corners locations and heights of all buildings,
penthouses and tiers. This
information is put into the system so the air quality models can
calculate aerodynamic building downwash
The AQ-Calc system allows the input of air
intakes on the facility buildings.
This information is then used in the modeling to see if impacts
from the stacks will cause high impacts at building fresh air
This database includes general facility
information such as site location, address, contacts,
The system uses site maps as overlays for the air
quality modeling impacts.
Site maps may either be CAD maps, government geological survey
maps or aerial photographs.