TABLE 5.
Concentration of respirable dust by work task
| Work task | Scaffolder and carpenter | Manual demolition worker | Bricklayer and similar | Other work tasks | All tasks |
|---|---|---|---|---|---|
| Measurements | 9 | 7 | 20 | 8 | 44 |
| Measurements <LOD | 3 | 1 | 2 | 3 | 9 |
| Average sampling time (min) (min‐max sampling time: 240–480) | 286 | 343 | 324 | 390 | 331 |
| GM mg/m3 | 0.16 | 0.34 | 0.34 | 0.14 | 0.25 |
| GSD | 5.36 | 6.25 | 4.43 | 7.02 | 5.23 |
| AM mg/m3 | 0.55 | 1.12 | 1.03 | 0.50 | 0.88 |
| SD | 0.97 | 1.97 | 2.10 | 0.72 | 1.70 |
| Min ‐ Max | 0.026–3.01 | 0.031–5.86 | 0.025–9.10 | 0.015–2.00 | 0.015–9.1 |
| %≥TLV | 11.11 | 12.5 | 10.00 | 0 | 9.09 |
Abbreviations: AM, Arithmetic mean of the exposure concentration; LOD, Level of detection; GM, Geometric mean of the exposure concentration; GSD, Geometric Standard Deviation; SD, Standard deviation; %>TLV, percentage of exposures exceeding the TLV.