Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
073	CHEMISTS, EXCEPT BIOCHEMISTS	851	187
075	GEOLOGISTS AND GEODESISTS	28
223	BIOLOGICAL TECHNICIANS	686	300
224	CHEMICAL TECHNICIANS	92
453	JANITORS AND CLEANERS	127
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
694	WATER AND SEWAGE TREATMENT PLANT OPERATORS	66
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	79
756	MIXING AND BLENDING MACHINE OPERATORS	18
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	2,574	386
759	PAINTING AND PAINT SPRAYING MACHINE OPERATORS	314	43
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	123
779	MACHINE OPERATORS, NOT SPECIFIED	86
783	WELDERS AND CUTTERS	751
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	9
TOTAL		6,571	916

*(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.