Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	107
446	HEALTH AIDES, EXCEPT NURSING	1,064	745
453	JANITORS AND CLEANERS	119	36
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	58
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	161
717	FABRICATING MACHINE OPERATORS, N.E.C.	107
723	METAL PLATING MACHINE OPERATORS	2,147	268
724	HEAT TREATING EQUIPMENT OPERATORS	56
725	MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS	376	376
735	PHOTOENGRAVERS AND LITHOGRAPHERS	1,417	236
753	CEMENTING AND GLUING MACHINE OPERATORS	150
887	VEHICLE WASHERS AND EQUIPMENT CLEANERS	81
TOTAL		5,844	1,662

*(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.