Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
243	SUPERVISORS AND PROPRIETORS, SALES OCCUPATIONS	307
453	JANITORS AND CLEANERS	481
486	GROUNDSKEEPERS AND GARDENERS, EXCEPT FARM	2,373
505	AUTOMOBILE MECHANICS	1,227
518	INDUSTRIAL MACHINERY REPAIRERS	253	46
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	307
549	NOT SPECIFIED MECHANICS AND REPAIRERS	493
695	POWER PLANT OPERATORS	59	14
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	645
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	506
727	SAWING MACHINE OPERATORS	723
779	MACHINE OPERATORS, NOT SPECIFIED	1,446
783	WELDERS AND CUTTERS	1,094
785	ASSEMBLERS	1,516	20
804	TRUCK DRIVERS, HEAVY	1,422
844	OPERATING ENGINEERS	104
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	723
TOTAL		13,678	80

*(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.