Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
518	INDUSTRIAL MACHINERY REPAIRERS	62
549	NOT SPECIFIED MECHANICS AND REPAIRERS	219
565	TILE SETTERS, HARD AND SOFT	4,274
593	INSULATION WORKERS	5,892
633	SUPERVISORS, PRODUCTION OCCUPATIONS	103
675	HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS	723
725	MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS	45
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	114
768	CRUSHING AND GRINDING MACHINE OPERATORS	34
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	344
779	MACHINE OPERATORS, NOT SPECIFIED	264
849	CRANE AND TOWER OPERATORS	160
889	LABORERS, EXCEPT CONSTRUCTION	686
TOTAL		12,920

*(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.