Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	175
385	DATA-ENTRY KEYERS	568	568
453	JANITORS AND CLEANERS	94
678	DENTAL LABORATORY AND MEDICAL APPLIANCE TECHNICIANS	1,581
696	STATIONARY ENGINEERS	512
719	MOLDING AND CASTING MACHINE OPERATORS	2,115	353
734	PRINTING MACHINE OPERATORS	4,345	375
737	MISCELLANEOUS PRINTING MACHINE OPERATORS	568	284
755	EXTRUDING AND FORMING MACHINE OPERATORS	252
756	MIXING AND BLENDING MACHINE OPERATORS	408
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	2,842	2,730
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	853
TOTAL		14,314	4,310

*(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.