Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
057	MECHANICAL ENGINEERS	87	19
453	JANITORS AND CLEANERS	4,513
508	AIRCRAFT ENGINE MECHANICS	2,445	243
533	MISCELLANEOUS ELECTRICAL AND ELECTRONIC EQUIPMENT REPAIRERS	116	19
549	NOT SPECIFIED MECHANICS AND REPAIRERS	60
637	MACHINISTS	708
696	STATIONARY ENGINEERS	158
703	LATHE AND TURNING MACHINE SET-UP OPERATORS	9
723	METAL PLATING MACHINE OPERATORS	1,522	81
734	PRINTING MACHINE OPERATORS	503
754	PACKAGING AND FILLING MACHINE OPERATORS	68
755	EXTRUDING AND FORMING MACHINE OPERATORS	755	378
756	MIXING AND BLENDING MACHINE OPERATORS	805	544
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	380	41
779	MACHINE OPERATORS, NOT SPECIFIED	563
785	ASSEMBLERS	3,113	2,044
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	223
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	215
878	MACHINE FEEDERS AND OFFBEARERS	382	287
889	LABORERS, EXCEPT CONSTRUCTION	387	106
TOTAL		17,011	3,762

*(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.