Table 2.

Summary of RCS-TWA (8h) personal dust concentrations (mg/m³) for three occupations in gold mining.

Job title	Rock drill operator				Scraper winch operator				Loco operator
Mine	I		II		I		II		I		II
Year	2010	2015	2010	2015	2010	2015	2010*	2015*	2010	2015	2010	2015
N	79	59	40	47	17	34	128	230	300	110	153	149
Median	0.04	0.033	0.018	0.02	0.032	0.038	0.013	0.015	0.033	0.046	0.02	0.016
AM	0.045	0.035	0.025	0.022	0.033	0.039	0.023	0.018	0.049	0.045	0.024	0.019
GM	0.033	0.027	0.017	0.018	0.027	0029	0.019	0.014	0.028	0.034	0.018	0.016
GSD	2.27	2.45	2.62	1.95	2.07	3.15	1.94	2.02	2.78	2.62	2.17	1.93
%> 0.05 mg/m3	37	17	12	2.1	18	26	4.7	3	33	40	4.6	3.4

^*Significant difference.