Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
019	MANAGERS AND ADMINISTRATORS, N.E.C.	378
036	INSPECTORS AND COMPLIANCE OFFICERS, EXC. CONSTRUCTION	41
224	CHEMICAL TECHNICIANS	205
453	JANITORS AND CLEANERS	700
505	AUTOMOBILE MECHANICS	123
516	HEAVY EQUIPMENT MECHANICS	101
519	MACHINERY MAINTENANCE OCCUPATIONS	164	41
549	NOT SPECIFIED MECHANICS AND REPAIRERS	878
558	SUPERVISORS, N.E.C.	116
563	BRICKMASONS AND STONEMASONS	15,251
565	TILE SETTERS, HARD AND SOFT	2,056
567	CARPENTERS	2,231
575	ELECTRICIANS	246
588	CONCRETE AND TERRAZZO FINISHERS	2,088	34
599	CONSTRUCTION TRADES, N.E.C.	1,797
615	EXPLOSIVES WORKERS	246
617	MINING OCCUPATIONS, N.E.C.	159
633	SUPERVISORS, PRODUCTION OCCUPATIONS	749
637	MACHINISTS	123
675	HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS	1,430
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	44	5
753	CEMENTING AND GLUING MACHINE OPERATORS	156
755	EXTRUDING AND FORMING MACHINE OPERATORS	507
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	410
768	CRUSHING AND GRINDING MACHINE OPERATORS	287
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	1,039
779	MACHINE OPERATORS, NOT SPECIFIED	44
783	WELDERS AND CUTTERS	265
787	HAND MOLDING, CASTING, AND FORMING OCCUPATIONS	7	5
804	TRUCK DRIVERS, HEAVY	7,698
844	OPERATING ENGINEERS	1,891	181
849	CRANE AND TOWER OPERATORS	509
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	316
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	1,127
869	CONSTRUCTION LABORERS	46,060	1,139
878	MACHINE FEEDERS AND OFFBEARERS	501
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	276
888	HAND PACKERS AND PACKAGERS	410
889	LABORERS, EXCEPT CONSTRUCTION	4,218
TOTAL		94,846	1,405

*(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.