PRIMARY METAL INDUSTRIES (SIC 33)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
045	METALLURGICAL AND MATERIALS ENGINEERS	100.0%	0.0%	0.0%	0.0%	0.0%	64
055	ELECTRICAL AND ELECTRONIC ENGINEERS	100.0%	0.0%	0.0%	0.0%	0.0%	5
073	CHEMISTS, EXCEPT BIOCHEMISTS	100.0%	0.0%	0.0%	0.0%	0.0%	19
216	ENGINEERING TECHNICIANS, N.E.C.	100.0%	0.0%	0.0%	0.0%	0.0%	40
224	CHEMICAL TECHNICIANS	100.0%	0.0%	0.0%	0.0%	0.0%	37
363	PRODUCTION COORDINATORS	100.0%	0.0%	0.0%	0.0%	0.0%	8
364	TRAFFIC, SHIPPING, AND RECEIVING CLERKS	100.0%	0.0%	0.0%	0.0%	0.0%	8
374	MATERIAL RECORDING, SCHEDULING, AND DISTRIBUTING CLERKS, N.E.C.	40.0%	0.0%	0.0%	0.0%	60.0%	13
453	JANITORS AND CLEANERS	100.0%	0.0%	0.0%	0.0%	0.0%	67
516	HEAVY EQUIPMENT MECHANICS	100.0%	0.0%	0.0%	0.0%	0.0%	11
518	INDUSTRIAL MACHINERY REPAIRERS	100.0%	0.0%	0.0%	0.0%	0.0%	21
519	MACHINERY MAINTENANCE OCCUPATIONS	100.0%	0.0%	0.0%	0.0%	0.0%	27
523	ELECTRONIC REPAIRERS, COMMUNICATIONS AND INDUSTRIAL EQUIPMENT	100.0%	0.0%	0.0%	0.0%	0.0%	88
533	MISCELLANEOUS ELECTRICAL AND ELECTRONIC EQUIPMENT REPAIRERS	0.0%	0.0%	0.0%	0.0%	100.0%	11
539	MECHANICAL CONTROLS AND VALVE REPAIRERS	100.0%	0.0%	0.0%	0.0%	0.0%	37
544	MILLWRIGHTS	100.0%	0.0%	0.0%	0.0%	0.0%	717
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	100.0%	0.0%	0.0%	0.0%	0.0%	93
549	NOT SPECIFIED MECHANICS AND REPAIRERS	100.0%	0.0%	0.0%	0.0%	0.0%	16
563	BRICKMASONS AND STONEMASONS	100.0%	0.0%	0.0%	0.0%	0.0%	5
575	ELECTRICIANS	100.0%	0.0%	0.0%	0.0%	0.0%	43
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	100.0%	0.0%	0.0%	0.0%	0.0%	48
637	MACHINISTS	100.0%	0.0%	0.0%	0.0%	0.0%	32
643	BOILERMAKERS	100.0%	0.0%	0.0%	0.0%	0.0%	40
689	INSPECTORS, TESTERS, AND GRADERS	100.0%	0.0%	0.0%	0.0%	0.0%	13
696	STATIONARY ENGINEERS	100.0%	0.0%	0.0%	0.0%	0.0%	3
704	LATHE AND TURNING MACHINE OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	3
707	ROLLING MACHINE OPERATORS	74.5%	0.0%	0.0%	0.0%	25.5%	125
715	MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	24
724	HEAT TREATING EQUIPMENT OPERATORS	83.3%	0.0%	0.0%	0.0%	16.7%	48
727	SAWING MACHINE OPERATORS	0.0%	0.0%	0.0%	0.0%	100.0%	3
756	MIXING AND BLENDING MACHINE OPERATORS	15.5%	0.0%	84.5%	0.0%	0.0%	138
757	SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS	92.0%	0.0%	0.0%	0.0%	8.0%	133
758	COMPRESSING AND COMPACTING MACHINE OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	13
766	FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD	35.1%	0.0%	54.1%	10.8%	0.0%	99
768	CRUSHING AND GRINDING MACHINE OPERATORS	5.4%	0.0%	0.0%	0.0%	94.6%	99
769	SLICING AND CUTTING MACHINE OPERATORS	0.0%	0.0%	0.0%	0.0%	100.0%	13
777	MISCELLANEOUS MACHINE OPERATORS, N.E.C.	100.0%	0.0%	0.0%	0.0%	0.0%	13
779	MACHINE OPERATORS, NOT SPECIFIED	64.3%	0.0%	0.0%	0.0%	35.7%	37
783	WELDERS AND CUTTERS	100.0%	0.0%	0.0%	0.0%	0.0%	19
785	ASSEMBLERS	100.0%	0.0%	0.0%	0.0%	0.0%	117
796	PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS	100.0%	0.0%	0.0%	0.0%	0.0%	69
797	PRODUCTION TESTERS	100.0%	0.0%	0.0%	0.0%	0.0%	21
798	PRODUCTION SAMPLERS AND WEIGHERS	100.0%	0.0%	0.0%	0.0%	0.0%	8
804	TRUCK DRIVERS, HEAVY	100.0%	0.0%	0.0%	0.0%	0.0%	5
849	CRANE AND TOWER OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	51
856	INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	21
859	MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	16
873	PRODUCTION HELPERS	100.0%	0.0%	0.0%	0.0%	0.0%	72
883	FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C.	100.0%	0.0%	0.0%	0.0%	0.0%	85
889	LABORERS, EXCEPT CONSTRUCTION	86.4%	0.0%	0.0%	0.0%	13.6%	117
SUBTOTAL		86.1%	0.0%	6.0%	0.3%	7.3%	2,815
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
889	LABORERS, EXCEPT CONSTRUCTION	100.0%	0.0%	0.0%	0.0%	0.0%	2,042
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	2,042
TRANSPORTATION EQUIPMENT (SIC 37)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
889	LABORERS, EXCEPT CONSTRUCTION	100.0%	0.0%	0.0%	0.0%	0.0%	34
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	34
TOTAL		92.0%	0.0%	3.4%	0.2%	4.2%	4,891
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.