OIL AND GAS EXTRACTION (SIC 13)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
617	MINING OCCUPATIONS, N.E.C.	100.0%	0.0%	0.0%	0.0%	0.0%	12,222
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	12,222
GENERAL BUILDING CONTRACTORS (SIC 15)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
563	BRICKMASONS AND STONEMASONS	100.0%	0.0%	0.0%	0.0%	0.0%	615
567	CARPENTERS	100.0%	0.0%	0.0%	0.0%	0.0%	492
869	CONSTRUCTION LABORERS	100.0%	0.0%	0.0%	0.0%	0.0%	862
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	1,969
HEAVY CONSTRUCTION CONTRACTORS (SIC 16)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
844	OPERATING ENGINEERS	100.0%	0.0%	0.0%	0.0%	0.0%	2,049
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	2,049
SPECIAL TRADE CONTRACTORS (SIC 17)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
558	SUPERVISORS, N.E.C.	100.0%	0.0%	0.0%	0.0%	0.0%	784
599	CONSTRUCTION TRADES, N.E.C.	100.0%	0.0%	0.0%	0.0%	0.0%	2,612
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	3,396
STONE, CLAY, AND GLASS PRODUCTS (SIC 32)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
584	PLASTERERS	100.0%	0.0%	0.0%	0.0%	0.0%	188
633	SUPERVISORS, PRODUCTION OCCUPATIONS	0.0%	0.0%	0.0%	100.0%	0.0%	697
779	MACHINE OPERATORS, NOT SPECIFIED	100.0%	0.0%	0.0%	0.0%	0.0%	4,848
804	TRUCK DRIVERS, HEAVY	0.0%	0.0%	0.0%	100.0%	0.0%	1,741
SUBTOTAL		67.3%	0.0%	0.0%	32.6%	0.0%	7,474
HEALTH SERVICES (SIC 80)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
563	BRICKMASONS AND STONEMASONS	0.0%	0.0%	100.0%	0.0%	0.0%	18
SUBTOTAL		0.0%	0.0%	100.0%	0.0%	0.0%	18
TOTAL		90.9%	0.0%	6.6%	8.9%	0.0%	27,128
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.