Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	121	35
368	WEIGHERS, MEASURERS, AND CHECKERS	119
453	JANITORS AND CLEANERS	470
633	SUPERVISORS, PRODUCTION OCCUPATIONS	70
719	MOLDING AND CASTING MACHINE OPERATORS	2,150	80
748	LAUNDERING AND DRY CLEANING MACHINE OPERATORS	175
749	MISCELLANEOUS TEXTILE MACHINE OPERATORS	1,359
756	MIXING AND BLENDING MACHINE OPERATORS	2,839	116
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	119
TOTAL		7,422	231

*(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.