Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
259	SALES REPRESENTATIVES, MINING, MANUFACTURING, AND WHOLESALE	479	479
453	JANITORS AND CLEANERS	412
508	AIRCRAFT ENGINE MECHANICS	6,707	57
679	BOOKBINDERS	462	231
734	PRINTING MACHINE OPERATORS	1,362
769	SLICING AND CUTTING MACHINE OPERATORS	212
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	462
779	MACHINE OPERATORS, NOT SPECIFIED	1,917
787	HAND MOLDING, CASTING, AND FORMING OCCUPATIONS	1,046	405
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	360
TOTAL		13,419	1,173

*(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.