OIL AND GAS EXTRACTION (SIC 13)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
889	LABORERS, EXCEPT CONSTRUCTION	11,333
SUBTOTAL		11,333
HEAVY CONSTRUCTION CONTRACTORS (SIC 16)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
829	SAILORS AND DECKHANDS	1,650
SUBTOTAL		1,650
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
549	NOT SPECIFIED MECHANICS AND REPAIRERS	1,376
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	1,079	5
SUBTOTAL		2,455	5
PETROLEUM AND COAL PRODUCTS (SIC 29)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	322
224	CHEMICAL TECHNICIANS	1,031	372
453	JANITORS AND CLEANERS	1,312
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	795
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	1,715	158
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	4,930
878	MACHINE FEEDERS AND OFFBEARERS	801
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	475	79
SUBTOTAL		11,381	609
TRANSPORTATION BY AIR (SIC 45)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
226	AIRPLANE PILOTS AND NAVIGATORS	6,064
465	PUBLIC TRANSPORTATION ATTENDANTS	1,455	243
508	AIRCRAFT ENGINE MECHANICS	2,425	243
515	AIRCRAFT MECHANICS, EXC. ENGINE	38
SUBTOTAL		9,982	486
TOTAL		36,801	1,100
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.