Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	525
633	SUPERVISORS, PRODUCTION OCCUPATIONS	434
634	TOOL AND DIE MAKERS	57
637	MACHINISTS	431
676	PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS	197
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	28
733	MISCELLANEOUS WOODWORKING MACHINE OPERATORS	77
768	CRUSHING AND GRINDING MACHINE OPERATORS	77
779	MACHINE OPERATORS, NOT SPECIFIED	1,364
TOTAL		3,190

*(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.