Distribution of the mean exposure duration and intensity per week for each row of the persulphate specific matrix among the exposed workers (percentages)
| Row 1 | Row 2 | Row 3 | |
|---|---|---|---|
| Duration | |||
| Less than 2 hours | 64.0 | 28.6 | 29.5 |
| From 2 to fewer than 10 hours | 20.0 | 42.9 | 49.7 |
| From 10 to fewer than 20 hours | 8.0 | 25.0 | 14.2 |
| 20 hours or more | 8.0 | 3.6 | 6.6 |
| Total | 100.0 | 100.0 | 100.0 |
| Intensity | |||
| Low | 43.5 | 30.8 | 27.6 |
| Medium | 39.1 | 19.2 | 55.3 |
| High | 17.4 | 50.0 | 14.7 |
| Very high | 0.0 | 0.0 | 2.4 |
| Total | 100.0 | 100.0 | 100.0 |