Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
365	STOCK AND INVENTORY CLERKS	109
453	JANITORS AND CLEANERS	382
505	AUTOMOBILE MECHANICS	1,380
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	606
637	MACHINISTS	453
755	EXTRUDING AND FORMING MACHINE OPERATORS	477
779	MACHINE OPERATORS, NOT SPECIFIED	15,233	4,352
785	ASSEMBLERS	4,041	1,360
TOTAL		22,681	5,712

*(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.