Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
223	BIOLOGICAL TECHNICIANS	53
365	STOCK AND INVENTORY CLERKS	58
453	JANITORS AND CLEANERS	117
633	SUPERVISORS, PRODUCTION OCCUPATIONS	117
754	PACKAGING AND FILLING MACHINE OPERATORS	58
756	MIXING AND BLENDING MACHINE OPERATORS	2,163
763	ROASTING AND BAKING MACHINE OPERATORS, FOOD	117
768	CRUSHING AND GRINDING MACHINE OPERATORS	1,170
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	274
779	MACHINE OPERATORS, NOT SPECIFIED	2,719
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	175
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	91
877	STOCK HANDLERS AND BAGGERS	773
878	MACHINE FEEDERS AND OFFBEARERS	58
TOTAL		7,945

*(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.