Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	3,736
505	AUTOMOBILE MECHANICS	23
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	608
519	MACHINERY MAINTENANCE OCCUPATIONS	109
549	NOT SPECIFIED MECHANICS AND REPAIRERS	440
634	TOOL AND DIE MAKERS	33
637	MACHINISTS	6,309
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	77
695	POWER PLANT OPERATORS	96
704	LATHE AND TURNING MACHINE OPERATORS	29
705	MILLING AND PLANING MACHINE OPERATORS	21
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	293	42
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	99
719	MOLDING AND CASTING MACHINE OPERATORS	24
756	MIXING AND BLENDING MACHINE OPERATORS	201
768	CRUSHING AND GRINDING MACHINE OPERATORS	452	49
769	SLICING AND CUTTING MACHINE OPERATORS	522	31
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	58
779	MACHINE OPERATORS, NOT SPECIFIED	198	15
783	WELDERS AND CUTTERS	376	31
785	ASSEMBLERS	1,231	322
889	LABORERS, EXCEPT CONSTRUCTION	21
TOTAL		14,952	491

*(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.