Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	44	32
216	ENGINEERING TECHNICIANS, N.E.C.	822	282
223	BIOLOGICAL TECHNICIANS	298	149
335	FILE CLERKS	149	30
446	HEALTH AIDES, EXCEPT NURSING	565	282
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	42
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	49
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	63	7
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	200	73
TOTAL		2,232	855

*(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.