Table 3 Size distribution of the respirable fraction, and quartz content of the different size ranges
% Of total mass (n = 8) | Quartz content (%) (n = 8) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
PM size (µm) | Median | Mean | SD | Min | Max | Median | Mean | SD | Min | Max |
> 2.5 | 43.4 | 44.9 | 9.6 | 34.7 | 58.6 | 4.7 | 4.6 | 2.0 | 1.7 | 7.8 |
2.5–1.0 | 18.0 | 18.5 | 5.5 | 11.4 | 27.6 | 3.7 | 3.8 | 1.4 | 2.1 | 5.8 |
1.0–0.5 | 9.0 | 9.4 | 3.2 | 4.2 | 13.5 | 1.8 | 2.3 | 1.8 | 0.5 | 5.7 |
0.5–0.25 | 6.0 | 6.5 | 3.1 | 2.0 | 12.8 | 1.0 | 1.5 | 1.4 | 0.2 | 3.9 |
< 0.25 | 19.5 | 20.7 | 7.0 | 8.6 | 32.1 | 1.2 | 1.1 | 0.7 | 0.1 | 2.4 |