Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	1,558
225	SCIENCE TECHNICIANS, N.E.C.	594
453	JANITORS AND CLEANERS	1,263
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	387
756	MIXING AND BLENDING MACHINE OPERATORS	300
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	5,193
873	PRODUCTION HELPERS	149
TOTAL		9,443

*(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.