Table 2

Measurements of airborne concentrations of wood dust (mg/m³) by job description

Job description	n	Mean (mg/m³)	Minimum (mg/m³)	Maximum (mg/m³)	Geometric mean (mg/m³)	Geometric SD
Without local exhaust ventilation:
Other than sanding^2-150	56	5.51	0.43	36.09	3.5	2.47
Sanding^2-151	57	12.74	0.76	61.44	7.86	2.01
With local exhaust ventilation:
Other than sanding^2-150	177	4.08	0.11	24.0	2.43	2.80
Sanding^2-151	153	8.34	0.01	131	4.48	3.47

↵2-150 Includes handling various types of saws, planing machines, mortising, tenoning, drilling machines, spindle moulding, slotting and milling machines.
↵2-151 Includes both manual and mechanical sanding operations.