High lead exposure in two leaded bronze ingot foundry workers

Table 2 Measurements in the work environment

Measured results (mg/m³)	OEL (TWA, mg/m³)	Initial measurement December 9, 2013		Follow-up measurement February 4, 2014
		Primary Operator	Assistant Operator	Primary Operator^*	Assistant Operator^*	Area sample of the melting furnace	Area sample of the molding frame
Lead	0.05	0.0073	ND	0.0013	0.0394	0.0310	0.0225
Nickel	0.5	0.0003	ND	0.0002	0.0001	0.0001	ND
Tin	2	0.0036	0.0002	ND	ND	ND	ND
Cooper	1	0.0006	0.0003	0.0032	0.0013	0.0009	ND

ND, not detectable; OEL, occupational exposure limit; TWA, time-weighted average.
^* New workers were assigned after the primary operator and his assistant were transferred out of the foundry.

ISSN: 2052-4374