Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	320
453	JANITORS AND CLEANERS	879	191
517	FARM EQUIPMENT MECHANICS	1,457
519	MACHINERY MAINTENANCE OCCUPATIONS	171
754	PACKAGING AND FILLING MACHINE OPERATORS	4,664
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	474
779	MACHINE OPERATORS, NOT SPECIFIED	961	160
889	LABORERS, EXCEPT CONSTRUCTION	1,049	215
TOTAL		9,976	566

*(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.