Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	8,373	1,055
505	AUTOMOBILE MECHANICS	476
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	883
515	AIRCRAFT MECHANICS, EXC. ENGINE	4,018
516	HEAVY EQUIPMENT MECHANICS	309
518	INDUSTRIAL MACHINERY REPAIRERS	156
519	MACHINERY MAINTENANCE OCCUPATIONS	927	716
544	MILLWRIGHTS	14
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	220
549	NOT SPECIFIED MECHANICS AND REPAIRERS	2,431	16
575	ELECTRICIANS	253
613	SUPERVISORS, EXTRACTIVE OCCUPATIONS	335
614	DRILLERS, OIL WELL	5,362
633	SUPERVISORS, PRODUCTION OCCUPATIONS	37
634	TOOL AND DIE MAKERS	33
637	MACHINISTS	6,977	29
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	77
695	POWER PLANT OPERATORS	96
704	LATHE AND TURNING MACHINE OPERATORS	35
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
768	CRUSHING AND GRINDING MACHINE OPERATORS	452	49
769	SLICING AND CUTTING MACHINE OPERATORS	528	31
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	58
779	MACHINE OPERATORS, NOT SPECIFIED	15,488	4,462
783	WELDERS AND CUTTERS	705	31
784	SOLDERERS AND BRAZERS	12	6
785	ASSEMBLERS	8,370	3,315
889	LABORERS, EXCEPT CONSTRUCTION	21
TOTAL		57,080	9,752

*(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.