Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	126
224	CHEMICAL TECHNICIANS	95	63
225	SCIENCE TECHNICIANS, N.E.C.	158
453	JANITORS AND CLEANERS	221
745	SHOE MACHINE OPERATORS	613	464
756	MIXING AND BLENDING MACHINE OPERATORS	288
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	113	48
888	HAND PACKERS AND PACKAGERS	428	380
889	LABORERS, EXCEPT CONSTRUCTION	360
TOTAL		2,401	955

*(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.