Inhalable dust concentration (mg/m3) for measurements in three sampling rounds
| Sampling round | n | GM (GSD) |
|---|---|---|
| n, number of measurements; GM, geometric mean; GSD, geometric standard deviation. | ||
| 1 | 1541 | 0.93 (2.11) |
| 2 | 351 | 0.94 (2.11) |
| 3 | 325 | 0.97 (1.99) |
| Total | 2217 | 0.96 (2.05) |