Code	Occupation Description (1980)	Total # Employees (Male & Female)	Total # Female Employees
216	ENGINEERING TECHNICIANS, N.E.C.	17	17
225	SCIENCE TECHNICIANS, N.E.C.	1,185	474
613	SUPERVISORS, EXTRACTIVE OCCUPATIONS	335
614	DRILLERS, OIL WELL	11,128
617	MINING OCCUPATIONS, N.E.C.	11,231
633	SUPERVISORS, PRODUCTION OCCUPATIONS	1,185
677	OPTICAL GOODS WORKERS	2,144	857
696	STATIONARY ENGINEERS	2,259
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	516
723	METAL PLATING MACHINE OPERATORS	25	7
753	CEMENTING AND GLUING MACHINE OPERATORS	35	35
756	MIXING AND BLENDING MACHINE OPERATORS	387
768	CRUSHING AND GRINDING MACHINE OPERATORS	67	67
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	5,466	137
804	TRUCK DRIVERS, HEAVY	3,227
824	LOCOMOTIVE OPERATING OCCUPATIONS	3,346
878	MACHINE FEEDERS AND OFFBEARERS	6,492
889	LABORERS, EXCEPT CONSTRUCTION	4,598
TOTAL		53,641	1,594

*(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.