Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
215	MECHANICAL ENGINEERING TECHNICIANS	123
243	SUPERVISORS AND PROPRIETORS, SALES OCCUPATIONS	307
453	JANITORS AND CLEANERS	10,365	31
505	AUTOMOBILE MECHANICS	33,276
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	1,793	8
508	AIRCRAFT ENGINE MECHANICS	2,015
515	AIRCRAFT MECHANICS, EXC. ENGINE	1,064
516	HEAVY EQUIPMENT MECHANICS	1,042
518	INDUSTRIAL MACHINERY REPAIRERS	332
519	MACHINERY MAINTENANCE OCCUPATIONS	57
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	1,712
549	NOT SPECIFIED MECHANICS AND REPAIRERS	7,028	14
563	BRICKMASONS AND STONEMASONS	185
577	ELECTRICAL POWER INSTALLERS AND REPAIRERS	622
579	PAINTERS, CONSTRUCTION AND MAINTENANCE	132
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	11
783	WELDERS AND CUTTERS	323
785	ASSEMBLERS	1,731	21
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	329
804	TRUCK DRIVERS, HEAVY	307
844	OPERATING ENGINEERS	3,219
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	216
885	GARAGE AND SERVICE STATION RELATED OCCUPATIONS	2,015
TOTAL		68,203	74

*(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.