OIL AND GAS EXTRACTION (SIC 13)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
617	MINING OCCUPATIONS, N.E.C.	6,111
SUBTOTAL		6,111
GENERAL BUILDING CONTRACTORS (SIC 15)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
563	BRICKMASONS AND STONEMASONS	615
567	CARPENTERS	492
869	CONSTRUCTION LABORERS	862
SUBTOTAL		1,969
HEAVY CONSTRUCTION CONTRACTORS (SIC 16)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
844	OPERATING ENGINEERS	2,049
SUBTOTAL		2,049
SPECIAL TRADE CONTRACTORS (SIC 17)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
558	SUPERVISORS, N.E.C.	784
599	CONSTRUCTION TRADES, N.E.C.	2,612
SUBTOTAL		3,396
STONE, CLAY, AND GLASS PRODUCTS (SIC 32)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
584	PLASTERERS	188
633	SUPERVISORS, PRODUCTION OCCUPATIONS	697
779	MACHINE OPERATORS, NOT SPECIFIED	1,212
804	TRUCK DRIVERS, HEAVY	1,741
SUBTOTAL		3,838
HEALTH SERVICES (SIC 80)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
563	BRICKMASONS AND STONEMASONS	18
SUBTOTAL		18
TOTAL		17,381
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.