2.6. Evaluation of the cancer risk
The calculation of occupational exposure for the lifetime of the
studied compounds was estimated by CDI in accordance with Eq.
(2) [26]. For evaluation of the CDI, certain values have been
assumed according to USEPA (1997a, b) to facilitate calculation of
the parameters (Table 2). The application of these models eliminates
the need for epidemiologic studies, which are timeconsuming
and high-cost.