| Exposure zone | Plant department associated with exposure zone | Mean PCM exposure (fibres >5 μm/cm3) | PCM adjustment factor | Mean TEM exposure (fibres <0.25 μm in diameter and >5 μm in length/cm3) | |||
| 1 | Preparation | 5.8 | 1.02 | 5.92 | |||
| 2 | Carding | 2.4 | 1.15 | 2.76 | |||
| 3 | Ring spinning | 8.2 | 1.31 | 10.74 | |||
| 4 | Mule spinning | 6.3 | 1.33 | 8.38 | |||
| 5 | Foster winding | 4.2 | 1.32 | 5.54 | |||
| 6 | Twisting | 5.4 | 2.17 | 11.72 | |||
| 7 | Universal winding | 4.1 | 1.13 | 4.63 | |||
| 8 | Heavy weaving | 2.6 | 1.34 | 3.48 | |||
| 9 | Light weaving | 2.7 | 1.69 | 4.56 | |||
| 10 | Finishing operations | 0.2 | 2.15 | 0.43 |