Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
069	PHYSICISTS AND ASTRONOMERS	14
073	CHEMISTS, EXCEPT BIOCHEMISTS	1,317	119
203	CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS	664	475
214	INDUSTRIAL ENGINEERING TECHNICIANS	14
216	ENGINEERING TECHNICIANS, N.E.C.	14
224	CHEMICAL TECHNICIANS	689	239
225	SCIENCE TECHNICIANS, N.E.C.	86
453	JANITORS AND CLEANERS	845	38
516	HEAVY EQUIPMENT MECHANICS	3,129	75
519	MACHINERY MAINTENANCE OCCUPATIONS	38
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	3,199
575	ELECTRICIANS	26,351	244
576	ELECTRICIAN APPRENTICES	368
577	ELECTRICAL POWER INSTALLERS AND REPAIRERS	3,653
593	INSULATION WORKERS	311
633	SUPERVISORS, PRODUCTION OCCUPATIONS	3
637	MACHINISTS	151
696	STATIONARY ENGINEERS	353
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	79
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	429
717	FABRICATING MACHINE OPERATORS, N.E.C.	151
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	2,594
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	952
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	1,077
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	876	113
783	WELDERS AND CUTTERS	605	227
849	CRANE AND TOWER OPERATORS	123
869	CONSTRUCTION LABORERS	332
TOTAL		48,418	1,530

*(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.