Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	261	75
213	ELECTRICAL AND ELECTRONIC TECHNICIANS	109	36
224	CHEMICAL TECHNICIANS	201
453	JANITORS AND CLEANERS	2,392	182
738	WINDING AND TWISTING MACHINE OPERATORS	411	225
756	MIXING AND BLENDING MACHINE OPERATORS	806
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	4,047	2,817
779	MACHINE OPERATORS, NOT SPECIFIED	23
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	872
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	101
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	8,315	4,733
887	VEHICLE WASHERS AND EQUIPMENT CLEANERS	509	145
TOTAL		18,047	8,214

*(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.