HCFC-123-induced toxic hepatitis and death at a Korean fire extinguisher manufacturing facility: a case series

Table 3 Eight-hour time-weighted average exposure level assessment for HCFC-123

Worker	Raw material pumping		Automatic charge line			Exposure standard
	Exposure concentration	Time measured	Exposure concentration	Time measured	TWA
	(ppm)	(min)	(ppm)	(min)	(ppm)
1	20.7	73	91.6	89	20.1	50 ppm (AIHA) 10 ppm (JSOH)
2^a	–		115.6	87	20.9
3	–		71.8	131	19.6
4	–		69.5	132	19.1

AIHA American Industrial Hygiene Association, JSOH Japan Society for Occupational Health, TWA time-weighted average
^aA hyphen means that it was not measured

ISSN: 2052-4374