Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	429
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	3,618
633	SUPERVISORS, PRODUCTION OCCUPATIONS	125
653	SHEET METAL WORKERS	387
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	69
783	WELDERS AND CUTTERS	120
785	ASSEMBLERS	609
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	28
TOTAL		5,385

*(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.