be an important reason for the less contamination in home interior
air than in school interior air.
To assess the uncertainties associated with the exposure factors,
the cumulative probability distribution of the calculated HQ of Cr
exposure via outdoor PM10 inhalation was depicted as an example
using a Monte Carlo simulation, and shown in Fig. 3. The mean and
median values of the HQ were 0.96 and 0.93, respectively, which