Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	101
518	INDUSTRIAL MACHINERY REPAIRERS	159
519	MACHINERY MAINTENANCE OCCUPATIONS	43
544	MILLWRIGHTS	371
575	ELECTRICIANS	174
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	145
633	SUPERVISORS, PRODUCTION OCCUPATIONS	3
719	MOLDING AND CASTING MACHINE OPERATORS	1,282	127
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	97
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	3,806
804	TRUCK DRIVERS, HEAVY	19
887	VEHICLE WASHERS AND EQUIPMENT CLEANERS	20
889	LABORERS, EXCEPT CONSTRUCTION	115	2
TOTAL		6,335	129

*(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.