Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	4,353	414
486	GROUNDSKEEPERS AND GARDENERS, EXCEPT FARM	94
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	1,734	2
516	HEAVY EQUIPMENT MECHANICS	494
517	FARM EQUIPMENT MECHANICS	16
518	INDUSTRIAL MACHINERY REPAIRERS	1,784
519	MACHINERY MAINTENANCE OCCUPATIONS	285
544	MILLWRIGHTS	1,904
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	266
549	NOT SPECIFIED MECHANICS AND REPAIRERS	1,436	3
563	BRICKMASONS AND STONEMASONS	185
575	ELECTRICIANS	3,797
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	5,941
633	SUPERVISORS, PRODUCTION OCCUPATIONS	209
634	TOOL AND DIE MAKERS	6,003	65
637	MACHINISTS	632
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	16
695	POWER PLANT OPERATORS	69
704	LATHE AND TURNING MACHINE OPERATORS	154
705	MILLING AND PLANING MACHINE OPERATORS	99
707	ROLLING MACHINE OPERATORS	441
708	DRILLING AND BORING MACHINE OPERATORS	339
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	563	152
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	403
719	MOLDING AND CASTING MACHINE OPERATORS	319
734	PRINTING MACHINE OPERATORS	207
754	PACKAGING AND FILLING MACHINE OPERATORS	539
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	23
769	SLICING AND CUTTING MACHINE OPERATORS	451
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	1,068
779	MACHINE OPERATORS, NOT SPECIFIED	1,460
783	WELDERS AND CUTTERS	104
785	ASSEMBLERS	1,043	278
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	3
864	HELPERS, MECHANICS AND REPAIRERS	19
869	CONSTRUCTION LABORERS	498
878	MACHINE FEEDERS AND OFFBEARERS	626	417
885	GARAGE AND SERVICE STATION RELATED OCCUPATIONS	7
889	LABORERS, EXCEPT CONSTRUCTION	10,624	88
TOTAL		48,209	1,420

*(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.