Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	6,363	389
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	225
514	AUTOMOBILE BODY AND RELATED REPAIRERS	939
518	INDUSTRIAL MACHINERY REPAIRERS	625
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	1,598
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	297
549	NOT SPECIFIED MECHANICS AND REPAIRERS	130
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	58
633	SUPERVISORS, PRODUCTION OCCUPATIONS	133
637	MACHINISTS	2,346
696	STATIONARY ENGINEERS	539
703	LATHE AND TURNING MACHINE SET-UP OPERATORS	259
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	888
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	24
779	MACHINE OPERATORS, NOT SPECIFIED	259
783	WELDERS AND CUTTERS	3,718
785	ASSEMBLERS	910	210
787	HAND MOLDING, CASTING, AND FORMING OCCUPATIONS	293
TOTAL		19,606	599

*(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.