Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
215	MECHANICAL ENGINEERING TECHNICIANS	108
216	ENGINEERING TECHNICIANS, N.E.C.	15
365	STOCK AND INVENTORY CLERKS	43
453	JANITORS AND CLEANERS	1,519
637	MACHINISTS	431
724	HEAT TREATING EQUIPMENT OPERATORS	53
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	42	19
783	WELDERS AND CUTTERS	142
785	ASSEMBLERS	215	69
TOTAL		2,567	88

*(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.