Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	243
365	STOCK AND INVENTORY CLERKS	776
453	JANITORS AND CLEANERS	237
518	INDUSTRIAL MACHINERY REPAIRERS	3,301
519	MACHINERY MAINTENANCE OCCUPATIONS	92
549	NOT SPECIFIED MECHANICS AND REPAIRERS	24
636	PRECISION ASSEMBLERS, METAL	508
637	MACHINISTS	1,837	8
724	HEAT TREATING EQUIPMENT OPERATORS	146
779	MACHINE OPERATORS, NOT SPECIFIED	243
799	GRADERS AND SORTERS, EXCEPT AGRICULTURAL	243	49
TOTAL		7,648	57

*(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.