Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
225	SCIENCE TECHNICIANS, N.E.C.	313	313
453	JANITORS AND CLEANERS	626
516	HEAVY EQUIPMENT MECHANICS	3,129	75
549	NOT SPECIFIED MECHANICS AND REPAIRERS	375
579	PAINTERS, CONSTRUCTION AND MAINTENANCE	408
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	3,110
653	SHEET METAL WORKERS	2,653
754	PACKAGING AND FILLING MACHINE OPERATORS	89
756	MIXING AND BLENDING MACHINE OPERATORS	89
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	268
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	1,008
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	715
779	MACHINE OPERATORS, NOT SPECIFIED	835
783	WELDERS AND CUTTERS	2,678
785	ASSEMBLERS	103
789	HAND PAINTING, COATING, AND DECORATING OCCUPATIONS	184
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	268
888	HAND PACKERS AND PACKAGERS	1,789	1,789
889	LABORERS, EXCEPT CONSTRUCTION	1,199
TOTAL		19,841	2,177

*(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.