Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	5,627
505	AUTOMOBILE MECHANICS	26
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	608
516	HEAVY EQUIPMENT MECHANICS	468
519	MACHINERY MAINTENANCE OCCUPATIONS	75
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	5,447
544	MILLWRIGHTS	4,534
549	NOT SPECIFIED MECHANICS AND REPAIRERS	467
575	ELECTRICIANS	65
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	1,511
593	INSULATION WORKERS	311
633	SUPERVISORS, PRODUCTION OCCUPATIONS	651
637	MACHINISTS	41
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	849
689	INSPECTORS, TESTERS, AND GRADERS	62	10
704	LATHE AND TURNING MACHINE OPERATORS	78
705	MILLING AND PLANING MACHINE OPERATORS	1,935
708	DRILLING AND BORING MACHINE OPERATORS	45
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	237	110
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	321
726	WOOD LATHE, ROUTING, AND PLANING MACHINE OPERATORS	353
734	PRINTING MACHINE OPERATORS	263
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	2,594
769	SLICING AND CUTTING MACHINE OPERATORS	131
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	111
779	MACHINE OPERATORS, NOT SPECIFIED	466	8
785	ASSEMBLERS	6,129	2,281
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	269
844	OPERATING ENGINEERS	129	129
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	321
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	697	10
869	CONSTRUCTION LABORERS	874
878	MACHINE FEEDERS AND OFFBEARERS	626	417
887	VEHICLE WASHERS AND EQUIPMENT CLEANERS	10
888	HAND PACKERS AND PACKAGERS	924	751
889	LABORERS, EXCEPT CONSTRUCTION	16
TOTAL		37,273	3,716

*(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.