Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
507	BUS, TRUCK, AND STATIONARY ENGINE MECHANICS	349
515	AIRCRAFT MECHANICS, EXC. ENGINE	12,855
549	NOT SPECIFIED MECHANICS AND REPAIRERS	1,468
689	INSPECTORS, TESTERS, AND GRADERS	170
785	ASSEMBLERS	1,426	91
TOTAL		16,268	91

*(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.