Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	1,196
597	STRUCTURAL METAL WORKERS	1,196
643	BOILERMAKERS	93
653	SHEET METAL WORKERS	299
783	WELDERS AND CUTTERS	1,850
873	PRODUCTION HELPERS	163
TOTAL		4,796

*(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.