MODELING INDOOR AIR EXPOSURE FROM SHORT-TERM POINT-SOURCE RELEASES

We have developed a simplified analytical indoor air model that descri bes the concentrations as a function of position and time in a room fo llowing a short-term release of airborne particles or gases. The indoo r dispersion model considers the two main physical processes of (1) po int-source dispersion with reflection from all walls and (2) the gener al concentration decay in a room due to room ventilation and surface d eposition of pollutants. Comparison of model predictions with experime ntal indoor measurements conducted by other researchers showed excelle nt agreement. This model should prove useful for human-health risk est imations in which the inhalation dose resulting from an indoor, short- term release of a contaminant needs to be calculated.