Table 2.

Exposure measurements of respirable quartz by job title

Agent	Job title	N	AM	Median	SD	GM	GSD	Min	Max
Quartz	Sand preparation	4	0.026	0.026	0.018	0.02	2.4	0.0064	0.046
	Melting	13	0.029	0.013	0.05	0.013	3.5	0.0014	0.19
	Core making	5	0.09	0.028	0.14	0.017	12	0.0013	0.33
	Moulding	14	0.025	0.023	0.021	0.016	3.1	0.0014	0.077
	Casting	4	0.0066	0.0056	0.004	0.0057	1.8	0.0029	0.012
	Shake out	5	0.12	0.08	0.11	0.08	2.8	0.023	0.29
	Fettling and blasting	18	0.12	0.03	0.21	0.024	7.6	0.0014	0.61
	Inspection	4	0.029	0.031	0.024	0.016	4.6	0.0019	0.05
	Maintenance incl. cleaning	4	0.022	0.024	0.012	0.019	2.2	0.0059	0.035
	Transport	7	0.016	0.017	0.0086	0.013	2	0.0039	0.029
	Others	7	0.0066	0.0058	0.0042	0.0053	2.1	0.0015	0.014
	Total	85	0.052	0.018	0.11	0.016	4.4	0.0013	0.61

N number of measurements, AM arithmetic mean, SD standard deviation, GM geometric mean, GSD geometric standard deviation