Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
365	STOCK AND INVENTORY CLERKS	142
453	JANITORS AND CLEANERS	2,562
515	AIRCRAFT MECHANICS, EXC. ENGINE	206
516	HEAVY EQUIPMENT MECHANICS	548
518	INDUSTRIAL MACHINERY REPAIRERS	570
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	1,703
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	76
549	NOT SPECIFIED MECHANICS AND REPAIRERS	1,862
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	100	6
634	TOOL AND DIE MAKERS	3,539
637	MACHINISTS	1,366	9
653	SHEET METAL WORKERS	1,986
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	653
717	FABRICATING MACHINE OPERATORS, N.E.C.	412
733	MISCELLANEOUS WOODWORKING MACHINE OPERATORS	119
779	MACHINE OPERATORS, NOT SPECIFIED	118
783	WELDERS AND CUTTERS	5,300	23
785	ASSEMBLERS	3,048	110
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	162
TOTAL		24,473	148

*(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.