Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	17	3
235	TECHNICIANS, N.E.C.	1,661	611
363	PRODUCTION COORDINATORS	9
374	MATERIAL RECORDING, SCHEDULING, AND DISTRIBUTING CLERKS, N.E.C.	63
379	GENERAL OFFICE CLERKS	69
453	JANITORS AND CLEANERS	14,661	649
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	559
508	AIRCRAFT ENGINE MECHANICS	6,707	57
516	HEAVY EQUIPMENT MECHANICS	244
518	INDUSTRIAL MACHINERY REPAIRERS	1,107
519	MACHINERY MAINTENANCE OCCUPATIONS	14
544	MILLWRIGHTS	57
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	502
549	NOT SPECIFIED MECHANICS AND REPAIRERS	1,953
558	SUPERVISORS, N.E.C.	374
565	TILE SETTERS, HARD AND SOFT	1,188
575	ELECTRICIANS	17,692
576	ELECTRICIAN APPRENTICES	368
577	ELECTRICAL POWER INSTALLERS AND REPAIRERS	933
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	19,910	12
633	SUPERVISORS, PRODUCTION OCCUPATIONS	37
634	TOOL AND DIE MAKERS	3,027	2
637	MACHINISTS	11,460	28
643	BOILERMAKERS	14
653	SHEET METAL WORKERS	864
674	MISCELLANEOUS PRECISION APPAREL AND FABRIC WORKERS	37	3
676	PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS	158
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	4,222	781
696	STATIONARY ENGINEERS	50
703	LATHE AND TURNING MACHINE SET-UP OPERATORS	63
704	LATHE AND TURNING MACHINE OPERATORS	1,586
705	MILLING AND PLANING MACHINE OPERATORS	34
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	467	31
708	DRILLING AND BORING MACHINE OPERATORS	183
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	302	3
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	7
719	MOLDING AND CASTING MACHINE OPERATORS	95
723	METAL PLATING MACHINE OPERATORS	41
724	HEAT TREATING EQUIPMENT OPERATORS	579
769	SLICING AND CUTTING MACHINE OPERATORS	406
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	705	141
779	MACHINE OPERATORS, NOT SPECIFIED	1,666
783	WELDERS AND CUTTERS	2,754
785	ASSEMBLERS	754	61
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	158	37
833	MARINE ENGINEERS	32
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	1,509	119
865	HELPERS, CONSTRUCTION TRADES	19
869	CONSTRUCTION LABORERS	1,735
TOTAL		101,057	2,539

*(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.