Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
057	MECHANICAL ENGINEERS	205
278	NEWS VENDORS	423
356	MAIL CLERKS, EXC. POSTAL SERVICE	5,396
374	MATERIAL RECORDING, SCHEDULING, AND DISTRIBUTING CLERKS, N.E.C.	63
426	GUARDS AND POLICE, EXC. PUBLIC SERVICE	140
453	JANITORS AND CLEANERS	11,962	300
505	AUTOMOBILE MECHANICS	8
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	559
508	AIRCRAFT ENGINE MECHANICS	6,707	57
516	HEAVY EQUIPMENT MECHANICS	244
518	INDUSTRIAL MACHINERY REPAIRERS	1,088
543	ELEVATOR INSTALLERS AND REPAIRERS	25
544	MILLWRIGHTS	256
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	469
549	NOT SPECIFIED MECHANICS AND REPAIRERS	2,727
558	SUPERVISORS, N.E.C.	374
565	TILE SETTERS, HARD AND SOFT	1,188
575	ELECTRICIANS	17,531
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	1,325	2
637	MACHINISTS	6,744	8
643	BOILERMAKERS	14
676	PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS	158
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	684
704	LATHE AND TURNING MACHINE OPERATORS	772
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	221
719	MOLDING AND CASTING MACHINE OPERATORS	1,516
723	METAL PLATING MACHINE OPERATORS	41
724	HEAT TREATING EQUIPMENT OPERATORS	579
734	PRINTING MACHINE OPERATORS	7,099
737	MISCELLANEOUS PRINTING MACHINE OPERATORS	573	64
755	EXTRUDING AND FORMING MACHINE OPERATORS	645	322
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	1,536
769	SLICING AND CUTTING MACHINE OPERATORS	394
779	MACHINE OPERATORS, NOT SPECIFIED	1,162
783	WELDERS AND CUTTERS	2,756
785	ASSEMBLERS	1,003	71
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	149	37
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	1,509	119
865	HELPERS, CONSTRUCTION TRADES	19
869	CONSTRUCTION LABORERS	1,735
873	PRODUCTION HELPERS	683	171
TOTAL		101,932	1,164

*(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.