Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	517	239
453	JANITORS AND CLEANERS	1,312
544	MILLWRIGHTS	168
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	795
549	NOT SPECIFIED MECHANICS AND REPAIRERS	215
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	4,930
787	HAND MOLDING, CASTING, AND FORMING OCCUPATIONS	737	58
TOTAL		8,675	297

*(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.