Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
203	CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS	402	277
447	NURSING AIDES, ORDERLIES, AND ATTENDANTS	94	16
449	MAIDS AND HOUSEMEN	1,070	733
453	JANITORS AND CLEANERS	1,415
518	INDUSTRIAL MACHINERY REPAIRERS	424	22
696	STATIONARY ENGINEERS	290
747	PRESSING MACHINE OPERATORS	439	220
748	LAUNDERING AND DRY CLEANING MACHINE OPERATORS	9,183	4,976
756	MIXING AND BLENDING MACHINE OPERATORS	184
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	4,304	220
806	DRIVER-SALES WORKERS	1,110
889	LABORERS, EXCEPT CONSTRUCTION	2,203	1,253
TOTAL		21,120	7,716

*(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.