Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
224	CHEMICAL TECHNICIANS	2,320	356
384	PROOFREADERS	303	303
453	JANITORS AND CLEANERS	1,066
519	MACHINERY MAINTENANCE OCCUPATIONS	22
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
669	SHOE REPAIRERS	120	120
694	WATER AND SEWAGE TREATMENT PLANT OPERATORS	66
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	114
749	MISCELLANEOUS TEXTILE MACHINE OPERATORS	696	339
754	PACKAGING AND FILLING MACHINE OPERATORS	23	23
756	MIXING AND BLENDING MACHINE OPERATORS	1,203
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	306	249
774	PHOTOGRAPHIC PROCESS MACHINE OPERATORS	96
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	954	123
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	9
888	HAND PACKERS AND PACKAGERS	428	380
TOTAL		8,470	1,892

*(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.