Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	830	192
075	GEOLOGISTS AND GEODESISTS	28
453	JANITORS AND CLEANERS	1,047
518	INDUSTRIAL MACHINERY REPAIRERS	2,132
519	MACHINERY MAINTENANCE OCCUPATIONS	98
549	NOT SPECIFIED MECHANICS AND REPAIRERS	1,141
567	CARPENTERS	65
593	INSULATION WORKERS	474
595	ROOFERS	4,244
616	MINING MACHINE OPERATORS	8,072
633	SUPERVISORS, PRODUCTION OCCUPATIONS	522	130
667	TAILORS	944
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	7
719	MOLDING AND CASTING MACHINE OPERATORS	307	7
734	PRINTING MACHINE OPERATORS	1,364
756	MIXING AND BLENDING MACHINE OPERATORS	161
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	2,594
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	686	18
769	SLICING AND CUTTING MACHINE OPERATORS	256
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	1,136	243
783	WELDERS AND CUTTERS	130
805	TRUCK DRIVERS, LIGHT	167
888	HAND PACKERS AND PACKAGERS	4,539	4,095
889	LABORERS, EXCEPT CONSTRUCTION	91
TOTAL		31,036	4,686

*(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.