Table 2.

Personal benzene exposure of underground and surface workers and benzene concentrations at fixed surface and underground locations

Benzene concentrations (μg/m3), mean ± SD
Personal benzene exposure
    Surface workers*114 ± 35
    Underground workers*190 ± 50
Fixed location benzene concentrations
    Surface*130 ± 27
    Underground*290 ± 44
Ambient air, Kohtla-Jarve29 ± 3
  • * Based on results from 15 passive samplers.

  • P < 0.05, significantly different from surface workers (t test).