Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	133
453	JANITORS AND CLEANERS	2,800
503	SUPERVISORS, MECHANICS AND REPAIRERS	2,429
637	MACHINISTS	1,317
676	PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS	122
703	LATHE AND TURNING MACHINE SET-UP OPERATORS	130
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	3,943	116
724	HEAT TREATING EQUIPMENT OPERATORS	353
727	SAWING MACHINE OPERATORS	65
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	65
779	MACHINE OPERATORS, NOT SPECIFIED	11,882
783	WELDERS AND CUTTERS	130
785	ASSEMBLERS	408
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	2,959
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	195
TOTAL		26,933	116

*(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.