Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	2,320	356
346	MAIL PREPARING AND PAPER HANDLING MACHINE OPERATORS	377	63
453	JANITORS AND CLEANERS	1,018
518	INDUSTRIAL MACHINERY REPAIRERS	366
519	MACHINERY MAINTENANCE OCCUPATIONS	22
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	260	94
549	NOT SPECIFIED MECHANICS AND REPAIRERS	470
567	CARPENTERS	57
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	44
593	INSULATION WORKERS	44
637	MACHINISTS	57
653	SHEET METAL WORKERS	75
694	WATER AND SEWAGE TREATMENT PLANT OPERATORS	66
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	114
719	MOLDING AND CASTING MACHINE OPERATORS	2,644	187
734	PRINTING MACHINE OPERATORS	880
749	MISCELLANEOUS TEXTILE MACHINE OPERATORS	65
756	MIXING AND BLENDING MACHINE OPERATORS	1,203
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	57
769	SLICING AND CUTTING MACHINE OPERATORS	419
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	1,449	395
779	MACHINE OPERATORS, NOT SPECIFIED	2,255	1,052
785	ASSEMBLERS	935	569
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	37
TOTAL		15,233	2,716

*(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.