GENERAL BUILDING CONTRACTORS (SIC 15)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
593	INSULATION WORKERS	5,892
SUBTOTAL		5,892
PRIMARY METAL INDUSTRIES (SIC 33)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
563	BRICKMASONS AND STONEMASONS	718
724	HEAT TREATING EQUIPMENT OPERATORS	247
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	234
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	25
865	HELPERS, CONSTRUCTION TRADES	288
889	LABORERS, EXCEPT CONSTRUCTION	165
SUBTOTAL		1,677
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	37
704	LATHE AND TURNING MACHINE OPERATORS	8
705	MILLING AND PLANING MACHINE OPERATORS	12
756	MIXING AND BLENDING MACHINE OPERATORS	33
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	8
779	MACHINE OPERATORS, NOT SPECIFIED	8
SUBTOTAL		106
INSTRUMENTS AND RELATED PRODUCTS (SIC 38)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	140
SUBTOTAL		140
TOTAL		7,815
RELATED PAGES: Estimates by SIC, Estimates by Occupation

*(1) The estimates for each occupation apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC where the agent was observed. Not all SICs were surveyed, and not all agents were observed in all surveyed SICs. (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.