| Average exposure time | Category of employees | ||||||
| Handling assistants | Technicians | Medical doctors | Secretaries | Other | Total | Percentage (%) | |
| 2 hours | 0 | 0 | 1 | 0 | 0 | 1 | 1.64 |
| 4 hours | 0 | 0 | 8 | 0 | 0 | 8 | 13.11 |
| 6 hours | 3 | 3 | 12 | 1 | 1 | 21 | 34.83 |
| 8 hours | 3 | 7 | 7 | 5 | 1 | 23 | 37.71 |
| More than 8 hours | 4 | 1 | 1 | 1 | 1 | 8 | 13.11 |