Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	133
453	JANITORS AND CLEANERS	2,388
503	SUPERVISORS, MECHANICS AND REPAIRERS	2,429
519	MACHINERY MAINTENANCE OCCUPATIONS	31	31
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	53
615	EXPLOSIVES WORKERS	122
637	MACHINISTS	947	275
675	HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS	519
708	DRILLING AND BORING MACHINE OPERATORS	824	397
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	5,237	1,038
719	MOLDING AND CASTING MACHINE OPERATORS	531
724	HEAT TREATING EQUIPMENT OPERATORS	475
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	763	31
768	CRUSHING AND GRINDING MACHINE OPERATORS	531
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	427	153
779	MACHINE OPERATORS, NOT SPECIFIED	8,878
785	ASSEMBLERS	1,130	977
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	3,644	366
889	LABORERS, EXCEPT CONSTRUCTION	427
TOTAL		29,489	3,267

*(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.