Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	140
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	37
563	BRICKMASONS AND STONEMASONS	718
593	INSULATION WORKERS	5,892
704	LATHE AND TURNING MACHINE OPERATORS	8
705	MILLING AND PLANING MACHINE OPERATORS	12
724	HEAT TREATING EQUIPMENT OPERATORS	247
756	MIXING AND BLENDING MACHINE OPERATORS	33
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	234
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	33
779	MACHINE OPERATORS, NOT SPECIFIED	8
865	HELPERS, CONSTRUCTION TRADES	288
889	LABORERS, EXCEPT CONSTRUCTION	165
TOTAL		7,816

*(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.