Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	36
453	JANITORS AND CLEANERS	275
515	AIRCRAFT MECHANICS, EXC. ENGINE	567	21
519	MACHINERY MAINTENANCE OCCUPATIONS	22
533	MISCELLANEOUS ELECTRICAL AND ELECTRONIC EQUIPMENT REPAIRERS	1,629
575	ELECTRICIANS	65
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	115
723	METAL PLATING MACHINE OPERATORS	73
753	CEMENTING AND GLUING MACHINE OPERATORS	656	115
754	PACKAGING AND FILLING MACHINE OPERATORS	213
768	CRUSHING AND GRINDING MACHINE OPERATORS	55	29
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	516	21
785	ASSEMBLERS	515	154
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	687
TOTAL		5,424	339

*(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.