Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
203	CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS	2,395	1,723
216	ENGINEERING TECHNICIANS, N.E.C.	109
223	BIOLOGICAL TECHNICIANS	298	149
224	CHEMICAL TECHNICIANS	3,274	1,427
235	TECHNICIANS, N.E.C.	512	183
335	FILE CLERKS	149	30
446	HEALTH AIDES, EXCEPT NURSING	35	14
453	JANITORS AND CLEANERS	1,704	803
744	TEXTILE SEWING MACHINE OPERATORS	266
756	MIXING AND BLENDING MACHINE OPERATORS	332	43
764	WASHING, CLEANING, AND PICKLING MACHINE OPERATORS	241
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	75
785	ASSEMBLERS	120	120
889	LABORERS, EXCEPT CONSTRUCTION	165	91
TOTAL		9,676	4,583

*(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.