Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	718	120
225	SCIENCE TECHNICIANS, N.E.C.	1,185	474
453	JANITORS AND CLEANERS	278
505	AUTOMOBILE MECHANICS	285
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	58
563	BRICKMASONS AND STONEMASONS	43
567	CARPENTERS	4,331
575	ELECTRICIANS	142
633	SUPERVISORS, PRODUCTION OCCUPATIONS	1,185
637	MACHINISTS	157
675	HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS	308
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	1,274
723	METAL PLATING MACHINE OPERATORS	5
753	CEMENTING AND GLUING MACHINE OPERATORS	156
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	494
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	1,263	299
783	WELDERS AND CUTTERS	1,027
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	139
797	PRODUCTION TESTERS	6
804	TRUCK DRIVERS, HEAVY	285
869	CONSTRUCTION LABORERS	2,984
889	LABORERS, EXCEPT CONSTRUCTION	4,132
TOTAL		20,455	893

*(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.