Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
059	ENGINEERS, N.E.C.	182
216	ENGINEERING TECHNICIANS, N.E.C.	1,311	426
453	JANITORS AND CLEANERS	1,312
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	140
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	382
549	NOT SPECIFIED MECHANICS AND REPAIRERS	616
563	BRICKMASONS AND STONEMASONS	1,440
593	INSULATION WORKERS	5,892
637	MACHINISTS	2,313	431
675	HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS	19
707	ROLLING MACHINE OPERATORS	60
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	2,087	928
719	MOLDING AND CASTING MACHINE OPERATORS	681
723	METAL PLATING MACHINE OPERATORS	47	35
755	EXTRUDING AND FORMING MACHINE OPERATORS	429	241
756	MIXING AND BLENDING MACHINE OPERATORS	2,090
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	503	453
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	2,853	84
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	954
779	MACHINE OPERATORS, NOT SPECIFIED	1,710
783	WELDERS AND CUTTERS	979
785	ASSEMBLERS	114
798	PRODUCTION SAMPLERS AND WEIGHERS	73
849	CRANE AND TOWER OPERATORS	218
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	106
878	MACHINE FEEDERS AND OFFBEARERS	19	16
889	LABORERS, EXCEPT CONSTRUCTION	1,141
TOTAL		27,669	2,616

*(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.