Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
516	HEAVY EQUIPMENT MECHANICS	156
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	627	52
549	NOT SPECIFIED MECHANICS AND REPAIRERS	184
558	SUPERVISORS, N.E.C.	64
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	2,076	100
595	ROOFERS	80
597	STRUCTURAL METAL WORKERS	939
633	SUPERVISORS, PRODUCTION OCCUPATIONS	391
634	TOOL AND DIE MAKERS	940	21
724	HEAT TREATING EQUIPMENT OPERATORS	386	63
783	WELDERS AND CUTTERS	16,481	136
785	ASSEMBLERS	2,192	63
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	313
853	EXCAVATING AND LOADING MACHINE OPERATORS	781
855	GRADER, DOZER, AND SCRAPER OPERATORS	468
TOTAL		26,079	434

*(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.