Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
223	BIOLOGICAL TECHNICIANS	263	88
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	1,261
453	JANITORS AND CLEANERS	1,498
487	ANIMAL CARETAKERS, EXCEPT FARM	1,333	1,075
755	EXTRUDING AND FORMING MACHINE OPERATORS	163
756	MIXING AND BLENDING MACHINE OPERATORS	1,251
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	175
768	CRUSHING AND GRINDING MACHINE OPERATORS	114
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	114
779	MACHINE OPERATORS, NOT SPECIFIED	2,606
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	489
804	TRUCK DRIVERS, HEAVY	227
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	88
877	STOCK HANDLERS AND BAGGERS	313
889	LABORERS, EXCEPT CONSTRUCTION	901
TOTAL		10,794	1,162

*(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.