Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	94	3
365	STOCK AND INVENTORY CLERKS	11
453	JANITORS AND CLEANERS	12,754	418
505	AUTOMOBILE MECHANICS	209
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	2,701
516	HEAVY EQUIPMENT MECHANICS	1,185
517	FARM EQUIPMENT MECHANICS	47
518	INDUSTRIAL MACHINERY REPAIRERS	3,501
519	MACHINERY MAINTENANCE OCCUPATIONS	833
538	OFFICE MACHINE REPAIRERS	1,932
544	MILLWRIGHTS	1,228	4
549	NOT SPECIFIED MECHANICS AND REPAIRERS	2,253	58
575	ELECTRICIANS	65
577	ELECTRICAL POWER INSTALLERS AND REPAIRERS	3,893	87
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	115
597	STRUCTURAL METAL WORKERS	1,319	10
633	SUPERVISORS, PRODUCTION OCCUPATIONS	826
634	TOOL AND DIE MAKERS	214
636	PRECISION ASSEMBLERS, METAL	508
637	MACHINISTS	618
667	TAILORS	32
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	71
695	POWER PLANT OPERATORS	69
704	LATHE AND TURNING MACHINE OPERATORS	210
705	MILLING AND PLANING MACHINE OPERATORS	1,977
708	DRILLING AND BORING MACHINE OPERATORS	16
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	450
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	58
717	FABRICATING MACHINE OPERATORS, N.E.C.	36	36
725	MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS	880
726	WOOD LATHE, ROUTING, AND PLANING MACHINE OPERATORS	353
727	SAWING MACHINE OPERATORS	3,141	163
734	PRINTING MACHINE OPERATORS	1,563
738	WINDING AND TWISTING MACHINE OPERATORS	1,773	916
739	KNITTING, LOOPING, TAPING, AND WEAVING MACHINE OPERATORS	390
744	TEXTILE SEWING MACHINE OPERATORS	107	107
749	MISCELLANEOUS TEXTILE MACHINE OPERATORS	321	224
754	PACKAGING AND FILLING MACHINE OPERATORS	1,416
765	FOLDING MACHINE OPERATORS	186
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	5
769	SLICING AND CUTTING MACHINE OPERATORS	131
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	280
779	MACHINE OPERATORS, NOT SPECIFIED	4,452	674
783	WELDERS AND CUTTERS	2,824
785	ASSEMBLERS	5,848	1,483
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	281	14
799	GRADERS AND SORTERS, EXCEPT AGRICULTURAL	5
804	TRUCK DRIVERS, HEAVY	2,732
825	RAILROAD BRAKE, SIGNAL, AND SWITCH OPERATORS	354
844	OPERATING ENGINEERS	845	129
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	321
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	687
869	CONSTRUCTION LABORERS	2,123	5
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	216
889	LABORERS, EXCEPT CONSTRUCTION	1,263
TOTAL		69,720	4,330

*(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.