Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
095	REGISTERED NURSES	7,260	7,260
203	CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS	521	456
206	RADIOLOGIC TECHNICIANS	718	507
216	ENGINEERING TECHNICIANS, N.E.C.	38
448	SUPERVISORS, CLEANING AND BUILDING SERVICE WORKERS	28
449	MAIDS AND HOUSEMEN	4,971	3,642
453	JANITORS AND CLEANERS	20,649	7,719
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	516
518	INDUSTRIAL MACHINERY REPAIRERS	114
637	MACHINISTS	788
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	283	177
725	MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS	71
753	CEMENTING AND GLUING MACHINE OPERATORS	167
756	MIXING AND BLENDING MACHINE OPERATORS	1,540	118
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	374	107
779	MACHINE OPERATORS, NOT SPECIFIED	23
783	WELDERS AND CUTTERS	71
869	CONSTRUCTION LABORERS	6,136	453
TOTAL		44,268	20,439

*(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.