Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	133
453	JANITORS AND CLEANERS	2,853
503	SUPERVISORS, MECHANICS AND REPAIRERS	2,429
637	MACHINISTS	4,420
676	PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS	122
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	212
704	LATHE AND TURNING MACHINE OPERATORS	168
705	MILLING AND PLANING MACHINE OPERATORS	617
707	ROLLING MACHINE OPERATORS	106
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	5,373	116
713	FORGING MACHINE OPERATORS	637
724	HEAT TREATING EQUIPMENT OPERATORS	566
725	MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS	53
769	SLICING AND CUTTING MACHINE OPERATORS	318
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	159	159
779	MACHINE OPERATORS, NOT SPECIFIED	15,732	265
783	WELDERS AND CUTTERS	80
785	ASSEMBLERS	641
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	2,959
889	LABORERS, EXCEPT CONSTRUCTION	390
TOTAL		37,969	541

*(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.