Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
057	MECHANICAL ENGINEERS	383	14
269	SALES WORKERS, PARTS	132
453	JANITORS AND CLEANERS	13,367	9
505	AUTOMOBILE MECHANICS	5,493	2,375
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	2,111
514	AUTOMOBILE BODY AND RELATED REPAIRERS	4,478
516	HEAVY EQUIPMENT MECHANICS	3,218
518	INDUSTRIAL MACHINERY REPAIRERS	1,466
519	MACHINERY MAINTENANCE OCCUPATIONS	1,279
544	MILLWRIGHTS	390
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	1,321
549	NOT SPECIFIED MECHANICS AND REPAIRERS	587
558	SUPERVISORS, N.E.C.	1,993
567	CARPENTERS	1,557
573	DRYWALL INSTALLERS	1,179
579	PAINTERS, CONSTRUCTION AND MAINTENANCE	726
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	9,280
596	SHEETMETAL DUCT INSTALLERS	105
597	STRUCTURAL METAL WORKERS	1,818
614	DRILLERS, OIL WELL	1,873
617	MINING OCCUPATIONS, N.E.C.	5,976
633	SUPERVISORS, PRODUCTION OCCUPATIONS	292
634	TOOL AND DIE MAKERS	1,233
636	PRECISION ASSEMBLERS, METAL	16
637	MACHINISTS	3,945	8
643	BOILERMAKERS	27
646	LAY-OUT WORKERS	1,999	22
653	SHEET METAL WORKERS	2,358
655	MISCELLANEOUS PRECISION METAL WORKERS	364
676	PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS	219	11
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	825
696	STATIONARY ENGINEERS	17
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	210	6
717	FABRICATING MACHINE OPERATORS, N.E.C.	1,036
719	MOLDING AND CASTING MACHINE OPERATORS	203
724	HEAT TREATING EQUIPMENT OPERATORS	3,772
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	83
769	SLICING AND CUTTING MACHINE OPERATORS	1,024
783	WELDERS AND CUTTERS	35,571	56
785	ASSEMBLERS	5,987
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	113
869	CONSTRUCTION LABORERS	2,347
889	LABORERS, EXCEPT CONSTRUCTION	132
TOTAL		120,505	2,500

*(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.