Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	96	32
453	JANITORS AND CLEANERS	1,384	80
549	NOT SPECIFIED MECHANICS AND REPAIRERS	285
575	ELECTRICIANS	108
633	SUPERVISORS, PRODUCTION OCCUPATIONS	163
634	TOOL AND DIE MAKERS	338
637	MACHINISTS	2,605
676	PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS	122
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	1,672
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	233	116
719	MOLDING AND CASTING MACHINE OPERATORS	1,624	104
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	211
769	SLICING AND CUTTING MACHINE OPERATORS	106
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	127
779	MACHINE OPERATORS, NOT SPECIFIED	4,563	123
783	WELDERS AND CUTTERS	54
785	ASSEMBLERS	408
873	PRODUCTION HELPERS	3
889	LABORERS, EXCEPT CONSTRUCTION	1,959	320
TOTAL		16,062	776

*(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.