Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	26
519	MACHINERY MAINTENANCE OCCUPATIONS	31
549	NOT SPECIFIED MECHANICS AND REPAIRERS	215
633	SUPERVISORS, PRODUCTION OCCUPATIONS	53
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	53
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	443	123
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	53
779	MACHINE OPERATORS, NOT SPECIFIED	66
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	61
TOTAL		1,001	123

*(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.