Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	718	120
225	SCIENCE TECHNICIANS, N.E.C.	53
453	JANITORS AND CLEANERS	31
557	SUPERVISORS; PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	3,250
558	SUPERVISORS, N.E.C.	906
563	BRICKMASONS AND STONEMASONS	5,343
565	TILE SETTERS, HARD AND SOFT	4,274
567	CARPENTERS	2,241
584	PLASTERERS	188
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	366
588	CONCRETE AND TERRAZZO FINISHERS	122
595	ROOFERS	5,584
599	CONSTRUCTION TRADES, N.E.C.	2,612
617	MINING OCCUPATIONS, N.E.C.	6,111
633	SUPERVISORS, PRODUCTION OCCUPATIONS	767
704	LATHE AND TURNING MACHINE OPERATORS	5,098
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	90
753	CEMENTING AND GLUING MACHINE OPERATORS	156
756	MIXING AND BLENDING MACHINE OPERATORS	319	45
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	33
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	2,098	299
779	MACHINE OPERATORS, NOT SPECIFIED	2,276
804	TRUCK DRIVERS, HEAVY	1,741
844	OPERATING ENGINEERS	2,049
869	CONSTRUCTION LABORERS	16,820
873	PRODUCTION HELPERS	124
TOTAL		63,367	464

*(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.