Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
056	INDUSTRIAL ENGINEERS	8
073	CHEMISTS, EXCEPT BIOCHEMISTS	607	482
203	CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS	466	362
216	ENGINEERING TECHNICIANS, N.E.C.	45	23
223	BIOLOGICAL TECHNICIANS	453	453
224	CHEMICAL TECHNICIANS	120	120
225	SCIENCE TECHNICIANS, N.E.C.	73
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	284	71
453	JANITORS AND CLEANERS	13,047	1,697
505	AUTOMOBILE MECHANICS	241
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	195
518	INDUSTRIAL MACHINERY REPAIRERS	338
575	ELECTRICIANS	38
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	95
617	MINING OCCUPATIONS, N.E.C.	13,996
675	HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS	485
694	WATER AND SEWAGE TREATMENT PLANT OPERATORS	1,929
696	STATIONARY ENGINEERS	13
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	5
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	106
719	MOLDING AND CASTING MACHINE OPERATORS	262
734	PRINTING MACHINE OPERATORS	887	496
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	930
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	741
768	CRUSHING AND GRINDING MACHINE OPERATORS	641	120
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	168
779	MACHINE OPERATORS, NOT SPECIFIED	135
785	ASSEMBLERS	52
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	26
TOTAL		36,387	3,824

*(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.