Respirable concentration of arsenic by exposure (μg/m3) in tin mines
| Three tin mines in Dachang | Limu tin mine | |||||
|---|---|---|---|---|---|---|
| Dust exposure | Samples | Range | Mean concentration | Samples | Range | Mean concentration |
| High | 14 | 1.9–38.3 | 10.2 | 3 | 0.36–0.7 | 0.5 |
| Medium | 2 | 2.4–4.7 | 3.5 | 1 | 1.16 | 1.2 |
| Low | 2 | 1.0–4.9 | 3.0 | 0 | — | — |
| No | 9 | 0.1–2.7 | 1.1 | 0 | — | — |