Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	1,811	454
335	FILE CLERKS	225	45
365	STOCK AND INVENTORY CLERKS	135
449	MAIDS AND HOUSEMEN	1,125	187
453	JANITORS AND CLEANERS	5,585	1,914
595	ROOFERS	4,244
633	SUPERVISORS, PRODUCTION OCCUPATIONS	871
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	486
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	45	45
719	MOLDING AND CASTING MACHINE OPERATORS	2,291	2,257
749	MISCELLANEOUS TEXTILE MACHINE OPERATORS	22	22
755	EXTRUDING AND FORMING MACHINE OPERATORS	1,153	943
756	MIXING AND BLENDING MACHINE OPERATORS	39
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	529
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	713	18
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	1,049	223
779	MACHINE OPERATORS, NOT SPECIFIED	998	633
785	ASSEMBLERS	2,890	1,549
889	LABORERS, EXCEPT CONSTRUCTION	882
TOTAL		25,091	8,291

*(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.