(VCCEP) Tier 1 Pilot Submission for BENZENE - Tera

An addition of less than 1 µg/m 3 benzene is estimated from the model results. This is less than
the 3.5 µg/m 3 additional benzene calculated by Wallace and less than the 2.5 µg/m3 calculated
from the raw data of Adgate et al. (2004a), in smoking households. The reasons for this result
may be an artifact of modeling results versus monitoring results and the fact that the modeled
exposure concentrations account for an age-specific activity pattern that accounts for a child’s
time outside of the home.
A further comparison of the estimated benzene intake by smokers, however, compares
reasonably to those reported by Wallace (1989a ,b), when expressed as an intake rate (i.e.
mg/day). For instance, in our analysis for the adult, the daily intake would be 4 µg/day. If the
Wallace assumptions, including smoking of 32 cigarettes/day and no inhalation absorption
factor for benzene, are taken into account, the benzene intake rate would be approximately 46
µg/day, which is consistent with Wallace’s estimate of 50 µg/day.
Benzene Exposure Resulting from Mainstream Smoke
Exposure to benzene from mainstream smoke was evaluated for adults (19-35 years) and
teenagers (16