TABLE 4.
Concentration of inhalable dust by work task
| Work task | Scaffolder and carpenter | Manual demolition worker | Bricklayer and similar | Other work tasks | All tasks |
|---|---|---|---|---|---|
| Measurements | 7 | 12 | 19 | 9 | 47 |
| Measurements <LOD | 0 | 0 | 0 | 2 | 2 |
| Average sampling time (min) (min‐max sampling time: 240–480) | 308 | 385 | 320 | 360 | 343 |
| GM mg/m3 | 2.23 | 13.92 | 5.08 | 1.73 | 4.73 |
| GSD | 3.23 | 3.66 | 2.79 | 11.27 | 5.02 |
| AM mg/m3 | 4.57 | 26.56 | 8.69 | 5.80 | 12.08 |
| SD | 7.44 | 28.74 | 11.03 | 5.40 | 18.25 |
| Min ‐ Max | 0.42 – 21.35 | 1.86 – 90.93 | 1.14 – 46.35 | 0.03 – 14.48 | 0.01 – 90.93 |
| % ≥ TLV | 14.28 | 58.33 | 36.84 | 22.22 | 36.17 |
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.