Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	2,432	356
453	JANITORS AND CLEANERS	1,425	53
519	MACHINERY MAINTENANCE OCCUPATIONS	212
549	NOT SPECIFIED MECHANICS AND REPAIRERS	63
573	DRYWALL INSTALLERS	1,204
579	PAINTERS, CONSTRUCTION AND MAINTENANCE	1,067
633	SUPERVISORS, PRODUCTION OCCUPATIONS	205
734	PRINTING MACHINE OPERATORS	2,732
735	PHOTOENGRAVERS AND LITHOGRAPHERS	582
737	MISCELLANEOUS PRINTING MACHINE OPERATORS	2,051	837
756	MIXING AND BLENDING MACHINE OPERATORS	2,005
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	102	51
769	SLICING AND CUTTING MACHINE OPERATORS	578
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	2,943
798	PRODUCTION SAMPLERS AND WEIGHERS	819
869	CONSTRUCTION LABORERS	1,950
888	HAND PACKERS AND PACKAGERS	337	270
889	LABORERS, EXCEPT CONSTRUCTION	226
TOTAL		20,933	1,567

*(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.