Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	305
365	STOCK AND INVENTORY CLERKS	14
453	JANITORS AND CLEANERS	325
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	559
518	INDUSTRIAL MACHINERY REPAIRERS	147
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	8,082
544	MILLWRIGHTS	36
549	NOT SPECIFIED MECHANICS AND REPAIRERS	1,069
558	SUPERVISORS, N.E.C.	1,908
567	CARPENTERS	1,949
575	ELECTRICIANS	21,195
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	14,678	3
588	CONCRETE AND TERRAZZO FINISHERS	122
595	ROOFERS	80
596	SHEETMETAL DUCT INSTALLERS	5,879	24
634	TOOL AND DIE MAKERS	164
637	MACHINISTS	2,739	5
643	BOILERMAKERS	14
653	SHEET METAL WORKERS	13,994	331
703	LATHE AND TURNING MACHINE SET-UP OPERATORS	157
704	LATHE AND TURNING MACHINE OPERATORS	35
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	2,541	467
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	138
717	FABRICATING MACHINE OPERATORS, N.E.C.	230
725	MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS	437
733	MISCELLANEOUS WOODWORKING MACHINE OPERATORS	449
769	SLICING AND CUTTING MACHINE OPERATORS	184
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	2,202
779	MACHINE OPERATORS, NOT SPECIFIED	3,102	49
783	WELDERS AND CUTTERS	1,583	3
784	SOLDERERS AND BRAZERS	436
785	ASSEMBLERS	1,315	177
787	HAND MOLDING, CASTING, AND FORMING OCCUPATIONS	812
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	162
804	TRUCK DRIVERS, HEAVY	129
844	OPERATING ENGINEERS	351
869	CONSTRUCTION LABORERS	12,500	71
TOTAL		100,020	1,131

*(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.