Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
056	INDUSTRIAL ENGINEERS	43
073	CHEMISTS, EXCEPT BIOCHEMISTS	639	145
216	ENGINEERING TECHNICIANS, N.E.C.	134	134
223	BIOLOGICAL TECHNICIANS	708	630
365	STOCK AND INVENTORY CLERKS	58
368	WEIGHERS, MEASURERS, AND CHECKERS	86
453	JANITORS AND CLEANERS	585	248
454	ELEVATOR OPERATORS	406
633	SUPERVISORS, PRODUCTION OCCUPATIONS	423
754	PACKAGING AND FILLING MACHINE OPERATORS	58
756	MIXING AND BLENDING MACHINE OPERATORS	1,059	529
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	259
763	ROASTING AND BAKING MACHINE OPERATORS, FOOD	117
768	CRUSHING AND GRINDING MACHINE OPERATORS	2,451
804	TRUCK DRIVERS, HEAVY	743
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	175
878	MACHINE FEEDERS AND OFFBEARERS	58
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	7,408
888	HAND PACKERS AND PACKAGERS	1,572	706
TOTAL		16,984	2,392

*(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.