Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
213	ELECTRICAL AND ELECTRONIC TECHNICIANS	293
224	CHEMICAL TECHNICIANS	1,433	179
365	STOCK AND INVENTORY CLERKS	541	35
453	JANITORS AND CLEANERS	19,519	389
505	AUTOMOBILE MECHANICS	14,850
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	5,381
508	AIRCRAFT ENGINE MECHANICS	2,015
514	AUTOMOBILE BODY AND RELATED REPAIRERS	2,991
516	HEAVY EQUIPMENT MECHANICS	6,888	156
518	INDUSTRIAL MACHINERY REPAIRERS	12,940	60
519	MACHINERY MAINTENANCE OCCUPATIONS	182
523	ELECTRONIC REPAIRERS, COMMUNICATIONS AND INDUSTRIAL EQUIPMENT	1,553
538	OFFICE MACHINE REPAIRERS	431
539	MECHANICAL CONTROLS AND VALVE REPAIRERS	3
544	MILLWRIGHTS	560
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	1,500	52
549	NOT SPECIFIED MECHANICS AND REPAIRERS	7,513
567	CARPENTERS	28
575	ELECTRICIANS	791
577	ELECTRICAL POWER INSTALLERS AND REPAIRERS	3,106
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	14,720
633	SUPERVISORS, PRODUCTION OCCUPATIONS	703
637	MACHINISTS	2,246
639	MACHINIST APPRENTICES	139
653	SHEET METAL WORKERS	806
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	205
689	INSPECTORS, TESTERS, AND GRADERS	58
696	STATIONARY ENGINEERS	107
733	MISCELLANEOUS WOODWORKING MACHINE OPERATORS	9
734	PRINTING MACHINE OPERATORS	1,815
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	9
769	SLICING AND CUTTING MACHINE OPERATORS	1,792
779	MACHINE OPERATORS, NOT SPECIFIED	1,976	54
783	WELDERS AND CUTTERS	1,687
785	ASSEMBLERS	6,772	28
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	52
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	343	172
865	HELPERS, CONSTRUCTION TRADES	326
869	CONSTRUCTION LABORERS	79
873	PRODUCTION HELPERS	198
889	LABORERS, EXCEPT CONSTRUCTION	608
TOTAL		117,167	1,125

*(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.