Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
059	ENGINEERS, N.E.C.	945
453	JANITORS AND CLEANERS	493
518	INDUSTRIAL MACHINERY REPAIRERS	625
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	1,781
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	367
549	NOT SPECIFIED MECHANICS AND REPAIRERS	666
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	113
596	SHEETMETAL DUCT INSTALLERS	873
633	SUPERVISORS, PRODUCTION OCCUPATIONS	133
645	PATTERNMAKERS AND MODEL MAKERS, METAL	139
696	STATIONARY ENGINEERS	45
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	26
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	14
785	ASSEMBLERS	21
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	495	185
TOTAL		6,736	185

*(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.