Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	12
235	TECHNICIANS, N.E.C.	212	88
453	JANITORS AND CLEANERS	616
634	TOOL AND DIE MAKERS	175
677	OPTICAL GOODS WORKERS	826	426
756	MIXING AND BLENDING MACHINE OPERATORS	319
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	185	74
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	196	85
785	ASSEMBLERS	57	28
873	PRODUCTION HELPERS	3
887	VEHICLE WASHERS AND EQUIPMENT CLEANERS	116	57
TOTAL		2,719	759

*(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.