Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
083	MEDICAL SCIENTISTS	523	149
216	ENGINEERING TECHNICIANS, N.E.C.	1,029	365
223	BIOLOGICAL TECHNICIANS	338	188
224	CHEMICAL TECHNICIANS	3,210	896
453	JANITORS AND CLEANERS	145
487	ANIMAL CARETAKERS, EXCEPT FARM	1,032	27
TOTAL		6,276	1,625

*(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.