Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
225	SCIENCE TECHNICIANS, N.E.C.	53	53
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	124
449	MAIDS AND HOUSEMEN	669	669
453	JANITORS AND CLEANERS	432	432
458	HAIRDRESSERS AND COSMETOLOGISTS	17,399	14,393
549	NOT SPECIFIED MECHANICS AND REPAIRERS	403	201
636	PRECISION ASSEMBLERS, METAL	1,119	947
637	MACHINISTS	201	172
748	LAUNDERING AND DRY CLEANING MACHINE OPERATORS	487	487
756	MIXING AND BLENDING MACHINE OPERATORS	705	50
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	1,878	1,549
785	ASSEMBLERS	1,406	1,348
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	64
888	HAND PACKERS AND PACKAGERS	1,696	1,420
TOTAL		26,636	21,723

*(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.