Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
019	MANAGERS AND ADMINISTRATORS, N.E.C.	368
053	CIVIL ENGINEERS	1,612
059	ENGINEERS, N.E.C.	1,085
064	COMPUTER SYSTEMS ANALYSTS AND SCIENTISTS	386	125
099	OCCUPATIONAL THERAPISTS	126	126
105	THERAPISTS, N.E.C.	29	29
216	ENGINEERING TECHNICIANS, N.E.C.	153
224	CHEMICAL TECHNICIANS	1,433	179
225	SCIENCE TECHNICIANS, N.E.C.	1,390	536
365	STOCK AND INVENTORY CLERKS	488
453	JANITORS AND CLEANERS	27,876	545
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	168
514	AUTOMOBILE BODY AND RELATED REPAIRERS	582
516	HEAVY EQUIPMENT MECHANICS	5,166
518	INDUSTRIAL MACHINERY REPAIRERS	1,196
519	MACHINERY MAINTENANCE OCCUPATIONS	90
533	MISCELLANEOUS ELECTRICAL AND ELECTRONIC EQUIPMENT REPAIRERS	3
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	4,447
544	MILLWRIGHTS	706
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	1,419
549	NOT SPECIFIED MECHANICS AND REPAIRERS	7,080
558	SUPERVISORS, N.E.C.	1,020
563	BRICKMASONS AND STONEMASONS	819
567	CARPENTERS	102
575	ELECTRICIANS	283
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	26,947	86
595	ROOFERS	80
596	SHEETMETAL DUCT INSTALLERS	1,520
597	STRUCTURAL METAL WORKERS	2,524
598	DRILLERS, EARTH	3,446
614	DRILLERS, OIL WELL	1,873
617	MINING OCCUPATIONS, N.E.C.	5,976
633	SUPERVISORS, PRODUCTION OCCUPATIONS	2,597
637	MACHINISTS	5,357	52
643	BOILERMAKERS	34	6
653	SHEET METAL WORKERS	5,922	43
658	FURNITURE AND WOOD FINISHERS	672	224
675	HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS	503
676	PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS	149
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	653
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	888
717	FABRICATING MACHINE OPERATORS, N.E.C.	199	57
756	MIXING AND BLENDING MACHINE OPERATORS	179
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	49
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	118
768	CRUSHING AND GRINDING MACHINE OPERATORS	106
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	1,693
779	MACHINE OPERATORS, NOT SPECIFIED	180	144
783	WELDERS AND CUTTERS	71,319	395
785	ASSEMBLERS	5,548	31
787	HAND MOLDING, CASTING, AND FORMING OCCUPATIONS	812
793	HAND ENGRAVING AND PRINTING OCCUPATIONS	475
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	674	37
804	TRUCK DRIVERS, HEAVY	283
844	OPERATING ENGINEERS	323
849	CRANE AND TOWER OPERATORS	741
853	EXCAVATING AND LOADING MACHINE OPERATORS	781
855	GRADER, DOZER, AND SCRAPER OPERATORS	468
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	218
865	HELPERS, CONSTRUCTION TRADES	288
869	CONSTRUCTION LABORERS	6,800	5
877	STOCK HANDLERS AND BAGGERS	77
889	LABORERS, EXCEPT CONSTRUCTION	15,543	144
TOTAL		224,042	2,763

*(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.