Air Pollution Control Program
Screen Modeling versus Refined Modeling
Simple screening procedures can be used to determine if a proposed source or modification poses a threat to the air quality within a region. If the screening analysis indicates that no threat to air quality is likely due to the construction of an emissions source; no further analysis is necessary and the compliance determination can be deemed complete. If, on the other hand, the screening results indicate potential adverse impacts, a refined air quality analysis will be required.
It should be noted that if the following criteria are met, a screening analysis is not appropriate and should not be conducted: the source configuration is complex; the emission rates are variable; multiple emission releases are under review; complex topographical features are present; or the existing air quality within the region is questionable. In these instances, a refined air quality analysis will be required.