Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	36
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	124
453	JANITORS AND CLEANERS	1,622
505	AUTOMOBILE MECHANICS	45
597	STRUCTURAL METAL WORKERS	258
637	MACHINISTS	452
689	INSPECTORS, TESTERS, AND GRADERS	193
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	129
748	LAUNDERING AND DRY CLEANING MACHINE OPERATORS	487	487
756	MIXING AND BLENDING MACHINE OPERATORS	453	50
779	MACHINE OPERATORS, NOT SPECIFIED	4,029
783	WELDERS AND CUTTERS	774
785	ASSEMBLERS	7,193	1,360
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	73
797	PRODUCTION TESTERS	122	61
TOTAL		15,991	1,959

*(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.