Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	112
224	CHEMICAL TECHNICIANS	351
335	FILE CLERKS	227
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	847
385	DATA-ENTRY KEYERS	568	568
449	MAIDS AND HOUSEMEN	119	59
453	JANITORS AND CLEANERS	2,550	232
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	287
549	NOT SPECIFIED MECHANICS AND REPAIRERS	165
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	1,406
734	PRINTING MACHINE OPERATORS	5,430	199
735	PHOTOENGRAVERS AND LITHOGRAPHERS	29
737	MISCELLANEOUS PRINTING MACHINE OPERATORS	1,476	768
748	LAUNDERING AND DRY CLEANING MACHINE OPERATORS	96
754	PACKAGING AND FILLING MACHINE OPERATORS	2,249	97
756	MIXING AND BLENDING MACHINE OPERATORS	28
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	92
774	PHOTOGRAPHIC PROCESS MACHINE OPERATORS	3
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	995
779	MACHINE OPERATORS, NOT SPECIFIED	486
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	292
887	VEHICLE WASHERS AND EQUIPMENT CLEANERS	985	159
TOTAL		18,791	2,083

*(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.