HEAVY CONSTRUCTION CONTRACTORS (SIC 16)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
235	TECHNICIANS, N.E.C.	2,080
539	MECHANICAL CONTROLS AND VALVE REPAIRERS	353
549	NOT SPECIFIED MECHANICS AND REPAIRERS	510
558	SUPERVISORS, N.E.C.	275
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	78
783	WELDERS AND CUTTERS	746
865	HELPERS, CONSTRUCTION TRADES	549
SUBTOTAL		4,591
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	1,902	1,098
235	TECHNICIANS, N.E.C.	512	183
453	JANITORS AND CLEANERS	426
754	PACKAGING AND FILLING MACHINE OPERATORS	827	276
756	MIXING AND BLENDING MACHINE OPERATORS	595	21
779	MACHINE OPERATORS, NOT SPECIFIED	967	580
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	21
797	PRODUCTION TESTERS	43
877	STOCK HANDLERS AND BAGGERS	138
889	LABORERS, EXCEPT CONSTRUCTION	302	91
SUBTOTAL		5,733	2,249
AUTO REPAIR, SERVICES, AND GARAGES (SIC 75)
Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
453	JANITORS AND CLEANERS	932	466
SUBTOTAL		932	466
TOTAL		11,256	2,715
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.