(VCCEP) Tier 1 Pilot Submission for BENZENE - Tera

for the air exchange rate (which assumes no open doors or windows) and the volume of the
residence were used (U.S. EPA, 1997b). The following equation was used to calculate the
average daily dose of benzene from ETS exposure:
where:
Benzene VCCEP Submission
March 2006
C × ED × EF × ET × IR × ABSi × CF
ADD =
BW × AT
ADD = average daily dose (mg/kg-day)
C = exposure concentration of benzene (mg/m 3 )
ET = exposure time (hours/day); 24 hours/day
EF = exposure frequency (days/year); 365 days/year
ED = exposure duration (years)
ABSi = benzene inhalation absorption factor; 0.5 (unitless)
BW = body weight (kg)
AT = averaging time (days)
Age-specific benzene concentrations and intake resulting from ETS exposure in the home were
calculated and are presented on Table 7.38 and 7.39.
Table 7.38: Summary of Average Daily Concentrations (ADCs) during ETS Benzene
Exposure (mg/m 3 )