Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	355	229
224	CHEMICAL TECHNICIANS	3,274	1,427
235	TECHNICIANS, N.E.C.	591	183
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	307
368	WEIGHERS, MEASURERS, AND CHECKERS	62
448	SUPERVISORS, CLEANING AND BUILDING SERVICE WORKERS	614	368
453	JANITORS AND CLEANERS	15,918	10,610
454	ELEVATOR OPERATORS	150
505	AUTOMOBILE MECHANICS	566
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	343
516	HEAVY EQUIPMENT MECHANICS	1,171
518	INDUSTRIAL MACHINERY REPAIRERS	1,492
519	MACHINERY MAINTENANCE OCCUPATIONS	725
529	TELEPHONE INSTALLERS AND REPAIRERS	1,446
535	CAMERA, WATCH, AND MUSICAL INSTRUMENT REPAIRERS	251
544	MILLWRIGHTS	153
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	208
549	NOT SPECIFIED MECHANICS AND REPAIRERS	2,119
558	SUPERVISORS, N.E.C.	5,597
563	BRICKMASONS AND STONEMASONS	38,219
567	CARPENTERS	13,080
573	DRYWALL INSTALLERS	2,592
575	ELECTRICIANS	5,372
584	PLASTERERS	746
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	432
588	CONCRETE AND TERRAZZO FINISHERS	4,546	34
594	PAVING, SURFACING, AND TAMPING EQUIPMENT OPERATORS	682
595	ROOFERS	19,855
599	CONSTRUCTION TRADES, N.E.C.	6,251
617	MINING OCCUPATIONS, N.E.C.	7,885
633	SUPERVISORS, PRODUCTION OCCUPATIONS	2,269
634	TOOL AND DIE MAKERS	3,539
637	MACHINISTS	244
645	PATTERNMAKERS AND MODEL MAKERS, METAL	78
653	SHEET METAL WORKERS	1,986
675	HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS	1,907
695	POWER PLANT OPERATORS	45
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	579
704	LATHE AND TURNING MACHINE OPERATORS	5,098
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	233	130
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	3,766	953
719	MOLDING AND CASTING MACHINE OPERATORS	3,808	55
724	HEAT TREATING EQUIPMENT OPERATORS	353
725	MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS	1,243	71
727	SAWING MACHINE OPERATORS	101
753	CEMENTING AND GLUING MACHINE OPERATORS	239	7
755	EXTRUDING AND FORMING MACHINE OPERATORS	1,570
756	MIXING AND BLENDING MACHINE OPERATORS	7,869	245
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	17	3
758	COMPRESSING AND COMPACTING MACHINE OPERATORS	380
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	763
764	WASHING, CLEANING, AND PICKLING MACHINE OPERATORS	159
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	888	59
768	CRUSHING AND GRINDING MACHINE OPERATORS	582
769	SLICING AND CUTTING MACHINE OPERATORS	107	14
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	6,680	318
779	MACHINE OPERATORS, NOT SPECIFIED	5,509	192
783	WELDERS AND CUTTERS	879
785	ASSEMBLERS	500
795	MISCELLANEOUS HAND WORKING OCCUPATIONS	182
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	205
797	PRODUCTION TESTERS	277
804	TRUCK DRIVERS, HEAVY	31,783	119
844	OPERATING ENGINEERS	19,441
848	HOIST AND WINCH OPERATORS	8,072
849	CRANE AND TOWER OPERATORS	172
853	EXCAVATING AND LOADING MACHINE OPERATORS	2,334
855	GRADER, DOZER, AND SCRAPER OPERATORS	2,177
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	874
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	2,572
865	HELPERS, CONSTRUCTION TRADES	1,812
869	CONSTRUCTION LABORERS	93,400	2,725
873	PRODUCTION HELPERS	130
878	MACHINE FEEDERS AND OFFBEARERS	1,012
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	1,370
888	HAND PACKERS AND PACKAGERS	380
889	LABORERS, EXCEPT CONSTRUCTION	8,950	927
TOTAL		361,534	18,669

*(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.