Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
365	STOCK AND INVENTORY CLERKS	56
366	METER READERS	2,207
453	JANITORS AND CLEANERS	2,978
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	218
516	HEAVY EQUIPMENT MECHANICS	619
518	INDUSTRIAL MACHINERY REPAIRERS	162
539	MECHANICAL CONTROLS AND VALVE REPAIRERS	2,515
544	MILLWRIGHTS	749
575	ELECTRICIANS	886
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	3,754
597	STRUCTURAL METAL WORKERS	1,196
634	TOOL AND DIE MAKERS	273
637	MACHINISTS	3,997
653	SHEET METAL WORKERS	299
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	1,188	56
704	LATHE AND TURNING MACHINE OPERATORS	652
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	1,615	323
708	DRILLING AND BORING MACHINE OPERATORS	24
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	41
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	43
719	MOLDING AND CASTING MACHINE OPERATORS	319
727	SAWING MACHINE OPERATORS	192
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	606
779	MACHINE OPERATORS, NOT SPECIFIED	16,937	4,693
783	WELDERS AND CUTTERS	79
785	ASSEMBLERS	181
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	6
TOTAL		41,791	5,072

*(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.