PRIMARY METAL INDUSTRIES (SIC 33)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
453	JANITORS AND CLEANERS	100.0%	0.0%	0.0%	0.0%	0.0%	1,849
534	HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS	100.0%	0.0%	0.0%	0.0%	0.0%	243
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	535
707	ROLLING MACHINE OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	778
724	HEAT TREATING EQUIPMENT OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	243
755	EXTRUDING AND FORMING MACHINE OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	1,411
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	100.0%	0.0%	0.0%	0.0%	0.0%	438
849	CRANE AND TOWER OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	568
889	LABORERS, EXCEPT CONSTRUCTION	100.0%	0.0%	0.0%	0.0%	0.0%	178
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	6,243
HEALTH SERVICES (SIC 80)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
085	DENTISTS	100.0%	0.0%	0.0%	0.0%	0.0%	36
678	DENTAL LABORATORY AND MEDICAL APPLIANCE TECHNICIANS	100.0%	0.0%	0.0%	0.0%	0.0%	35
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	71
TOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	6,314
RELATED PAGES: Estimates by SIC, Estimates by Occupation, Estimates by Occupation within SIC
ABBREVIATIONS: Resp Prot = Respiratory Protection Other PPE = Personal Protective Equipment Other Than Respiratory Protection Vent = Ventilation

*(1) The estimates for each occupation apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC where the agent was observed. Not all SICs were surveyed, and not all agents were observed in all surveyed SICs. (2) When using the estimated numbers of exposures, 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. (4) For a given occupation, the estimated number of potential exposures is not necessarily equal to the estimated total number of potentially exposed workers. For example, a worker may be exposed to the same agent from multiple sources; thus, it is not the worker that is controlled but the exposure. (5) The presence or absence of controls does not imply that controls are necessary or required. The estimates and the controls are strictly based on observations associated with potential exposures.