Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
019	MANAGERS AND ADMINISTRATORS, N.E.C.	263
235	TECHNICIANS, N.E.C.	78
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	710
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	343
549	NOT SPECIFIED MECHANICS AND REPAIRERS	1,156
558	SUPERVISORS, N.E.C.	1,269
563	BRICKMASONS AND STONEMASONS	1,289
567	CARPENTERS	1,919
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	39
588	CONCRETE AND TERRAZZO FINISHERS	3,735
594	PAVING, SURFACING, AND TAMPING EQUIPMENT OPERATORS	137
595	ROOFERS	2,889
596	SHEETMETAL DUCT INSTALLERS	912
599	CONSTRUCTION TRADES, N.E.C.	155
633	SUPERVISORS, PRODUCTION OCCUPATIONS	1,431
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	1,186
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	28
753	CEMENTING AND GLUING MACHINE OPERATORS	156
755	EXTRUDING AND FORMING MACHINE OPERATORS	809
756	MIXING AND BLENDING MACHINE OPERATORS	600
768	CRUSHING AND GRINDING MACHINE OPERATORS	323
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	301
779	MACHINE OPERATORS, NOT SPECIFIED	2,852
783	WELDERS AND CUTTERS	1,225
804	TRUCK DRIVERS, HEAVY	19,217
844	OPERATING ENGINEERS	15,425	94
849	CRANE AND TOWER OPERATORS	386
853	EXCAVATING AND LOADING MACHINE OPERATORS	1,648
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	1,419
865	HELPERS, CONSTRUCTION TRADES	549
869	CONSTRUCTION LABORERS	27,811	2,550
878	MACHINE FEEDERS AND OFFBEARERS	501
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	276
889	LABORERS, EXCEPT CONSTRUCTION	4,113
TOTAL		95,151	2,643

*(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.