Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
365	STOCK AND INVENTORY CLERKS	43
453	JANITORS AND CLEANERS	241
518	INDUSTRIAL MACHINERY REPAIRERS	262
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	7
634	TOOL AND DIE MAKERS	294
637	MACHINISTS	6
783	WELDERS AND CUTTERS	3,114
TOTAL		3,968

*(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.