Table 4.
Hand-arm vibration exposures evaluated by vector summations of the weighted RMS accelerations for haul truck drivers at four mines/quarries. Levels are compared with the ISO health guidance caution zone (HGCZ) action and limit boundary level conditions of ISO2631-1 and the European Union Directive 2002/44/EC presented in the European Union good practices guide (EUGPG).
| Quarry | Subject # | Day No. | Total sampling time (min) | Steer aw Vector Sum (m/s2) | Shifter aw Vector Sum (m/s2) | A(8) Steer aw Vector Sum (m/s2) | A(8) Shifter aw Vector Sum (m/s2) | ISO 2631-1 8-hr shift equivalent HGCZ dominant axis | EUGPG 8-hr shift equivalent HGCZ dominant axis |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 237 | 1.75 | 1.92 | 1.64 | 1.80 | Below | Below |
| 2 | 2 | 1 | 369 | 2.06 | 1.85 | 1.93 | 1.73 | Below | Below |
| 2 | 245 | 1.89 | 1.59 | 1.77 | 1.41 | Below | Below | ||
| 3 | 3 | 1 | 356 | 1.51 | 1.35 | 1.41 | 1.26 | Below | Below |
| 2 | 355 | 1.42 | 1.30 | 1.33 | 1.21 | Below | Below | ||
| 1 | 4 | 1 | 88 | 2.17 | 0.95 | 2.03 | 0.95 | Below | Below |
| 2 | 269 | 1.94 | 1.08 | 1.81 | 1.01 | Below | Below | ||
| 5 | 1 | 468 | 1.89 | 1.18 | 1.77 | 1.10 | Below | Below | |
| 2 | 489 | 2.14 | 1.36 | 2.00 | 1.28 | Below | Below | ||
| 4 | 6 | 1 | 368 | 1.14 | 0.51 | 1.07 | 0.47 | Below | Below |
| 2 | 397 | 1.24 | 1.10 | 1.16 | 1.03 | Below | Below | ||
| 7 | 1 | 358 | 1.01 | 0.52 | 0.94 | 0.48 | Below | Below | |
| 2 | 319 | 1.02 | 0.55 | 0.96 | 0.51 | Below | Below |