Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	50
549	NOT SPECIFIED MECHANICS AND REPAIRERS	177
567	CARPENTERS	486
645	PATTERNMAKERS AND MODEL MAKERS, METAL	166
727	SAWING MACHINE OPERATORS	1,310
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	25
783	WELDERS AND CUTTERS	101
785	ASSEMBLERS	100	100
804	TRUCK DRIVERS, HEAVY	262
869	CONSTRUCTION LABORERS	610
889	LABORERS, EXCEPT CONSTRUCTION	1,714	454
TOTAL		5,002	553

*(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.