Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
069	PHYSICISTS AND ASTRONOMERS	1,354	829
073	CHEMISTS, EXCEPT BIOCHEMISTS	796	261
078	BIOLOGICAL AND LIFE SCIENTISTS	69	62
203	CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS	648	462
208	HEALTH TECHNOLOGISTS AND TECHNICIANS, N.E.C.	1,625	1,134
216	ENGINEERING TECHNICIANS, N.E.C.	7
224	CHEMICAL TECHNICIANS	3,656	1,693
235	TECHNICIANS, N.E.C.	525	186
453	JANITORS AND CLEANERS	714
637	MACHINISTS	268
643	BOILERMAKERS	144
677	OPTICAL GOODS WORKERS	826	426
719	MOLDING AND CASTING MACHINE OPERATORS	681
756	MIXING AND BLENDING MACHINE OPERATORS	470	63
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	1,524
769	SLICING AND CUTTING MACHINE OPERATORS	14
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	26
785	ASSEMBLERS	5,473	5,473
797	PRODUCTION TESTERS	147	49
805	TRUCK DRIVERS, LIGHT	734
889	LABORERS, EXCEPT CONSTRUCTION	165	91
TOTAL		19,867	10,730

*(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.