Summary of particle size distribution analysis of different job tasks
| Ultrafine particles, % | Normalised concentration at dominating mode, dNdlogDp | Dominating mode, nm | |
|---|---|---|---|
| Operator of the slipforming machine | 84 | 1 653 320 | 52.2 |
| Finishing the verge | 83 | 1 653 415 | 60.4 |
| PVC welding horizontally | 97 | 885 731 | 10.8 |
| PVC welding—vertically | 99 | 6 363 181 | 34.0 |
| Background | 95 | 554 357 | 19.1 |
| Low range (break) | 100 | 237 736 | 10.8 |