Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	2,228	356
235	TECHNICIANS, N.E.C.	396	57
453	JANITORS AND CLEANERS	1,637
518	INDUSTRIAL MACHINERY REPAIRERS	62
558	SUPERVISORS, N.E.C.	784
599	CONSTRUCTION TRADES, N.E.C.	2,612
633	SUPERVISORS, PRODUCTION OCCUPATIONS	425	170
719	MOLDING AND CASTING MACHINE OPERATORS	598	448
734	PRINTING MACHINE OPERATORS	6,176	142
756	MIXING AND BLENDING MACHINE OPERATORS	1,203
888	HAND PACKERS AND PACKAGERS	93
TOTAL		16,214	1,173

*(1) The estimates for each occupation apply across the surveyed industries in which the agent was observed. Not all industries were surveyed, and not all agents were observed in all surveyed industries. (2) When using the estimates, standard errors associated with estimates should be considered. (3) Potential exposures to a chemical agent are categorized as actual (i.e., the surveyor observed the use of the specific agent) or tradename (i.e., the surveyor observed the use of a tradename product known to contain the specific agent). The estimates presented in the table combine both categories.