Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	36
365	STOCK AND INVENTORY CLERKS	142
453	JANITORS AND CLEANERS	2,855	64
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	469
516	HEAVY EQUIPMENT MECHANICS	758
518	INDUSTRIAL MACHINERY REPAIRERS	75
549	NOT SPECIFIED MECHANICS AND REPAIRERS	4,556
633	SUPERVISORS, PRODUCTION OCCUPATIONS	243
653	SHEET METAL WORKERS	18
779	MACHINE OPERATORS, NOT SPECIFIED	806
783	WELDERS AND CUTTERS	3,202	19
785	ASSEMBLERS	314
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	36
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	72
873	PRODUCTION HELPERS	180
TOTAL		13,762	84

*(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.