Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	172
225	SCIENCE TECHNICIANS, N.E.C.	86
558	SUPERVISORS, N.E.C.	708
567	CARPENTERS	708
633	SUPERVISORS, PRODUCTION OCCUPATIONS	322
695	POWER PLANT OPERATORS	102
696	STATIONARY ENGINEERS	1,381
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	653
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	127
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	212
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	605
869	CONSTRUCTION LABORERS	2,656
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	134
TOTAL		7,865

*(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.