Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	5,037	418
505	AUTOMOBILE MECHANICS	30
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	1,963
516	HEAVY EQUIPMENT MECHANICS	412
518	INDUSTRIAL MACHINERY REPAIRERS	199
519	MACHINERY MAINTENANCE OCCUPATIONS	777
538	OFFICE MACHINE REPAIRERS	431
549	NOT SPECIFIED MECHANICS AND REPAIRERS	901	51
577	ELECTRICAL POWER INSTALLERS AND REPAIRERS	3,893	87
597	STRUCTURAL METAL WORKERS	1,319	10
633	SUPERVISORS, PRODUCTION OCCUPATIONS	429
637	MACHINISTS	492
667	TAILORS	32
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	293
717	FABRICATING MACHINE OPERATORS, N.E.C.	36	36
725	MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS	880
727	SAWING MACHINE OPERATORS	3,141	163
734	PRINTING MACHINE OPERATORS	1,349
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
779	MACHINE OPERATORS, NOT SPECIFIED	4,077	656
783	WELDERS AND CUTTERS	2,824
785	ASSEMBLERS	2,314	1,369
799	GRADERS AND SORTERS, EXCEPT AGRICULTURAL	5
804	TRUCK DRIVERS, HEAVY	354
825	RAILROAD BRAKE, SIGNAL, AND SWITCH OPERATORS	354
844	OPERATING ENGINEERS	717
869	CONSTRUCTION LABORERS	1,714	5
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	216
889	LABORERS, EXCEPT CONSTRUCTION	1,234
TOTAL		39,622	4,041

*(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.