Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	129	46
567	CARPENTERS	1,635
573	DRYWALL INSTALLERS	327
724	HEAT TREATING EQUIPMENT OPERATORS	53	4
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	41
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	191
779	MACHINE OPERATORS, NOT SPECIFIED	321
783	WELDERS AND CUTTERS	25
785	ASSEMBLERS	1,238
878	MACHINE FEEDERS AND OFFBEARERS	249
TOTAL		4,209	50

*(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.