Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	261	75
453	JANITORS AND CLEANERS	242
599	CONSTRUCTION TRADES, N.E.C.	716
617	MINING OCCUPATIONS, N.E.C.	13,996
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	83
723	METAL PLATING MACHINE OPERATORS	17
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	54
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	17
785	ASSEMBLERS	18
804	TRUCK DRIVERS, HEAVY	6
869	CONSTRUCTION LABORERS	11,638
TOTAL		27,048	75

*(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.