Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
225	SCIENCE TECHNICIANS, N.E.C.	1,185	474
365	STOCK AND INVENTORY CLERKS	488
453	JANITORS AND CLEANERS	683	374
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	2,682
518	INDUSTRIAL MACHINERY REPAIRERS	159
544	MILLWRIGHTS	2,195
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	468
633	SUPERVISORS, PRODUCTION OCCUPATIONS	1,185
634	TOOL AND DIE MAKERS	273
637	MACHINISTS	1,977	17
639	MACHINIST APPRENTICES	139
653	SHEET METAL WORKERS	7
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	181
704	LATHE AND TURNING MACHINE OPERATORS	1,009
705	MILLING AND PLANING MACHINE OPERATORS	1,016
708	DRILLING AND BORING MACHINE OPERATORS	14
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	101	14
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	7
753	CEMENTING AND GLUING MACHINE OPERATORS	385
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	3,445	561
779	MACHINE OPERATORS, NOT SPECIFIED	2,169	341
783	WELDERS AND CUTTERS	494
785	ASSEMBLERS	170
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	123
869	CONSTRUCTION LABORERS	79
873	PRODUCTION HELPERS	238
888	HAND PACKERS AND PACKAGERS	2,104	1,169
889	LABORERS, EXCEPT CONSTRUCTION	10,733
TOTAL		33,709	2,951

*(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.