Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
019	MANAGERS AND ADMINISTRATORS, N.E.C.	216
216	ENGINEERING TECHNICIANS, N.E.C.	343	229
455	PEST CONTROL OCCUPATIONS	100
519	MACHINERY MAINTENANCE OCCUPATIONS	300
529	TELEPHONE INSTALLERS AND REPAIRERS	1,446
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	821
549	NOT SPECIFIED MECHANICS AND REPAIRERS	63
558	SUPERVISORS, N.E.C.	4,937
563	BRICKMASONS AND STONEMASONS	14,478
567	CARPENTERS	15,036
575	ELECTRICIANS	9,707
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	366
588	CONCRETE AND TERRAZZO FINISHERS	3,179
597	STRUCTURAL METAL WORKERS	1,126
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	863
753	CEMENTING AND GLUING MACHINE OPERATORS	183
755	EXTRUDING AND FORMING MACHINE OPERATORS	1,324
756	MIXING AND BLENDING MACHINE OPERATORS	830
779	MACHINE OPERATORS, NOT SPECIFIED	10,784	67
783	WELDERS AND CUTTERS	835
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	572
804	TRUCK DRIVERS, HEAVY	2,101
844	OPERATING ENGINEERS	4,207
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	447
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	254
869	CONSTRUCTION LABORERS	44,125	813
TOTAL		118,642	1,109

*(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.