Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
215	MECHANICAL ENGINEERING TECHNICIANS	58
243	SUPERVISORS AND PROPRIETORS, SALES OCCUPATIONS	633	203
453	JANITORS AND CLEANERS	411
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	48
637	MACHINISTS	3,714	1,382
735	PHOTOENGRAVERS AND LITHOGRAPHERS	239
736	TYPESETTERS AND COMPOSITORS	923
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	86
889	LABORERS, EXCEPT CONSTRUCTION	151	22
TOTAL		6,263	1,607

*(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.