Table 3.

Eight Hour Average Metal Concentrations of Welding Fume In Each Factory.

Factory No.	Eight hour Average Particulate Concentration (mg/m3)
	Total	Mn	Cu	Mo
1	5.0 5.0 4.0 5.0	0.106 0.116 0.080 0.142	0.002 0.003 0.001 0.004	0.001 0.001 0.001 0.001
2	5.0 5.0 3.5 7.0	0.117 0.062 0.066 0.184	0.002 0.002 0.001 0.006	0.001 0.001 0.001 0.001
3	17.0 24.0 13.5 24.0	0.026 0.477 0.272 0.091	0.001 0.009 0.059 0.080	0.001 0.002 0.001 0.001
4	8.0 7.0 12.0 8.0	0.098 0.085 0.010 0.129	0.002 0.005 0.003 0.003	0.004 0.002 0.001 0.058
5	9.5 4.0 10.5 13.0	0.279 0.088 0.190 0.280	0.022 0.002 0.002 0.003	0.021 0.001 0.001 0.001
6	3.5 2.5 4.5 3.5	0.050 0.187 0.095 0.082	0.002 0.001 0.001 0.002	0.001 0.003 0.003 0.001