Predicted cancer rates based on 1960 exposures to chemical carcinogens
| Pollutant | Conc. (ng m−3) | Unit risk factor (ng m−3)−1 | Annual cancer rate (per 105 popn) |
|---|---|---|---|
| *Overestimate as it includes all valence states of Cr. | |||
| PAH (as B(a)P) | 20 | 8.7×10−5 | 2.49 |
| Cr(VI) | 40* | 4.0×10−5 | 2.29 |
| Ni | 100 | 3.8×10−7 | 0.05 |
| As | 25 | 1.5×10−6 | 0.05 |
| Total | 4.88 | ||