Respirable dust and α-quartz levels of personal full shift measurements among several groups of construction workers
| n | Respirable dust AM* (min–max) | Respirable quartz AM (min–max) | |
|---|---|---|---|
| *Arithmetic mean. | |||
| Tuck pointers, chasing out mortar between bricks | 10 | 3.5 mg/m3 (0.6–8.0) | 0.56 mg/m3(0.09–1.7) |
| Concrete drillers and grinders, including recess milling | 14 | 2.8 mg/m3(0.2–11.5) | 0.84 mg/m3(0.03–3.8) |
| Demolition workers | 21 | 2.4 mg/m3(0.2–9.4) | 0.25 mg/m3(0.04–1.26) |
| Inner wall constructor | 4 | 2.1 mg/m3 (0.6–4.0) | 0.043 mg/m3(0.016–0.084) |
| Construction site cleaners | 12 | 0.99 mg/m3(0.1–2.5) | 0.032 mg/m3(0.002–0.1) |
| Background exposed group | 6 | 0.3 mg/m3 (0.1–0.4) | 0.005 mg/m3(0.002–0.015) |