Table 1.

Personal Airborne Exposure to Respirable Dust for Welders^a

			Mass concentration of respirable dust (mg/m3)
Company	Manufactured product	No. of workers in the exposure measurements	GM	GSD	Range
1	Hydraulic lifting tables	5	1.2	2.6	0.5–3.6
2	Containers	6	0.9	2.8	0.2–4.3
3	Stoves	6	0.6	2.9	0.2–2.3
4	Heating boilers and pumps	10	0.3	2.9	0.1–2.2
5	Fork‐lift trucks	9	3.6	2.8	0.5–11.8
6	Dumper‐trucks	9	1.9	2.0	0.5–5.8
7	Wheel loaders	9	1.7	2.7	0.5–9.1
8	Equipment for mining industry	4	1.0	2.0	0.5–2.3
9	Railway wagons	7	2.2	2.9	0.8–19.3
10	Asphalt rollers	5	1.2	2.3	0.6–3.3
Total		70	1.2	3.3	0.1–19.3

^aThe Swedish occupational exposure limit for respirable dust is 5 mg/m³.

GM, geometric mean; GSD, geometric standard deviation.