Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
056	INDUSTRIAL ENGINEERS	30
095	REGISTERED NURSES	1,047	1,022
216	ENGINEERING TECHNICIANS, N.E.C.	32
449	MAIDS AND HOUSEMEN	2,404	1,596
453	JANITORS AND CLEANERS	3,273	1,731
519	MACHINERY MAINTENANCE OCCUPATIONS	3
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	8
764	WASHING, CLEANING, AND PICKLING MACHINE OPERATORS	911
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	95
779	MACHINE OPERATORS, NOT SPECIFIED	8
783	WELDERS AND CUTTERS	5
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	76
TOTAL		7,892	4,348

*(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.