Table 1. Measurements of Asbestos Dust Concentrations (mg/m3) and Estimated Fiber Concentrations (f/ml) by Workshop in 2006.
| Workshop | No. of Samples | Geometric mean (range) | |
| Dust (mg/m3) | Fiber (f/ml) | ||
| Main workshops | 13 | 47.1 | 15.9 |
| Mining area | 5 | 5.3 (0.6–17.3) | 1.9 (0.5–5.6) |
| Milling plant 1 | 4 | 48.2 (12.5–196.7) | 15.2 (4.1–63.8) |
| Milling plant 2 | 4 | 84.3 (31.5–128.0) | 26.0 (9.9–47.4) |
| Other areas | 15 | 3.6 | 1.6 |
| Milling plant office | 3 | 9.7 (6.3–21.3) | 3.7 (2.3–6.8) |
| Package site | 3 | 8.4 (4.3–13.7) | 2.9 (1.6–4.5) |
| Maintenance area | 6 | 2.4 (0.3–5.8) | 1.1 (0.4–2.1) |
| Transportation site | 3 | 2.4 (0.8–5.1) | 1.1 (0.6–1.9) |