| Variable | Description | Value | Unit |
| CA | Contaminant concentration | --- | mg·m−3 |
| IR | Inhalation rate, adult | 0.83 | m3·h−1 |
| ED | Exposure duration, adult | 8 | hours·day−1 |
| EF | Exposure frequency | 48 | week·year−1 |
| L | Length of exposure | 30 | years |
| ATL | Average lifetime | 75 | years |
| BW | Bodyweight | 70 | kg |
| NY | Number of days per year | 365 | days |
| D | Days of work | 6 | days |
| SFBenzene | Slope factor | 0.029 | mg·kg−1·day−1 |
| RfDBenzene | Reference dose to benzene | 0.00855 | mg·kg−1·day−1 |
| RfDToluene | Reference dose to toluene | 1.43 | mg·kg−1·day−1 |
| RfDEthylbenzene | Reference dose to ethyl benzene | 0.286 | mg·kg−1·day−1 |
| RfDXylene | Reference dose to xylene | 0.029 | mg·kg−1·day−1 |