Step
2.1 Estimating Exposure Doses
Estimating an Ingestion Dose for Evaluating Noncancer Health Effects
A dose for ingesting a chemical is estimated using the same formula regardless
of whether the chemical was ingested in water, soil, or food. The formula
for estimating an ingestion dose is provided here.
The dose is calculated by multiplying the chemical level by the intake
rate by the exposure factor and dividing this product by the body weight.
In this formula, the exposure factor is calculated by multiplying the
number of days of exposure per year by the number of years of exposure
and dividing the product by the days per year multiplied by the number
of years of exposure.
Estimating an ingestion dose for cancerrelated health effects
The dose is calculated by multiplying the chemical level by the intake
rate by the exposure factor and dividing the product by the body weight.
In this formula, the exposure factor is calculated by multiplying the
number of days of exposure per year by the number of years of exposure
and dividing the product by the days per year multiplied by 70.
More on this Topic: Calculation Example
