Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	901
634	TOOL AND DIE MAKERS	175
637	MACHINISTS	1,366
676	PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS	122
703	LATHE AND TURNING MACHINE SET-UP OPERATORS	130
704	LATHE AND TURNING MACHINE OPERATORS	195
705	MILLING AND PLANING MACHINE OPERATORS	455
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	233	116
727	SAWING MACHINE OPERATORS	65
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	65
779	MACHINE OPERATORS, NOT SPECIFIED	5,335
783	WELDERS AND CUTTERS	210
785	ASSEMBLERS	408
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	195
873	PRODUCTION HELPERS	3
889	LABORERS, EXCEPT CONSTRUCTION	390
TOTAL		10,250	116

*(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.