National Occupational Exposure Survey
(1981 - 1983)

Estimated Percentages of Controlled and Uncontrolled Potential Exposures to Specific Agents by Occupation within 2-Digit Standard Industrial Classification (SIC)*

Agent Name W, TUNGSTEN-MF UNKNOWN
CAS # 7440-33-7
RTECS # YO7175000 
Agent Code 74980

SPECIAL TRADE CONTRACTORS (SIC 17)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
783 WELDERS AND CUTTERS 0.0%
 0.0%
 50.0%
 50.0%
 0.0%
 475
869 CONSTRUCTION LABORERS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 4,390
SUBTOTAL 90.2%
 0.0%
 4.8%
 4.8%
 0.0%
 4,865
FOOD AND KINDRED PRODUCTS (SIC 20)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
783 WELDERS AND CUTTERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 36
SUBTOTAL 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 36
RUBBER AND MISC. PLASTICS PRODUCTS (SIC 30)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
783 WELDERS AND CUTTERS 0.0%
 0.0%
 80.0%
 20.0%
 0.0%
 54
SUBTOTAL 0.0%
 0.0%
 80.0%
 20.0%
 0.0%
 54
STONE, CLAY, AND GLASS PRODUCTS (SIC 32)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
637 MACHINISTS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 339
783 WELDERS AND CUTTERS 0.0%
 0.0%
 59.9%
 40.1%
 0.0%
 577
SUBTOTAL 0.0%
 0.0%
 74.7%
 25.2%
 0.0%
 916
PRIMARY METAL INDUSTRIES (SIC 33)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
453 JANITORS AND CLEANERS 98.6%
 0.0%
 1.4%
 0.0%
 0.0%
 4,316
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 243
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 224
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 37
637 MACHINISTS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 1,032
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
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
 0.0%
 72.9%
 27.1%
 0.0%
 24,776
724 HEAT TREATING EQUIPMENT OPERATORS 12.4%
 0.0%
 87.6%
 0.0%
 0.0%
 1,964
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
779 MACHINE OPERATORS, NOT SPECIFIED 3.1%
 3.1%
 93.8%
 0.0%
 0.0%
 4,711
783 WELDERS AND CUTTERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 1,964
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 149
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%
 3,620
SUBTOTAL 26.5%
 0.3%
 58.7%
 14.3%
 0.0%
 46,766
FABRICATED METAL PRODUCTS (SIC 34)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
453 JANITORS AND CLEANERS 0.0%
 0.0%
 96.3%
 3.7%
 0.0%
 1,109
634 TOOL AND DIE MAKERS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 1,722
769 SLICING AND CUTTING MACHINE OPERATORS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 775
783 WELDERS AND CUTTERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 865
785 ASSEMBLERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 2,510
SUBTOTAL 24.6%
 0.0%
 74.7%
 0.5%
 0.0%
 6,981
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
453 JANITORS AND CLEANERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 247
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 731
549 NOT SPECIFIED MECHANICS AND REPAIRERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 1,233
724 HEAT TREATING EQUIPMENT OPERATORS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 47
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 93
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 1,710
783 WELDERS AND CUTTERS 0.0%
 0.0%
 79.1%
 20.9%
 0.0%
 1,654
785 ASSEMBLERS 0.0%
 0.0%
 73.1%
 26.9%
 0.0%
 2,952
SUBTOTAL 19.7%
 0.0%
 67.1%
 13.1%
 0.0%
 8,667
ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
055 ELECTRICAL AND ELECTRONIC ENGINEERS 0.0%
 0.0%
 0.0%
 0.0%
 100.0%
 488
213 ELECTRICAL AND ELECTRONIC TECHNICIANS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 17
225 SCIENCE TECHNICIANS, N.E.C. 0.0%
 0.0%
 0.0%
 0.0%
 100.0%
 6
453 JANITORS AND CLEANERS 75.0%
 0.0%
 25.0%
 0.0%
 0.0%
 1,036
535 CAMERA, WATCH, AND MUSICAL INSTRUMENT REPAIRERS 0.0%
 0.0%
 0.0%
 0.0%
 100.0%
 86
633 SUPERVISORS, PRODUCTION OCCUPATIONS 88.9%
 0.0%
 11.1%
 0.0%
 0.0%
 699
684 MISCELLANEOUS PRECISION WORKERS, N.E.C. 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 311
695 POWER PLANT OPERATORS 0.0%
 0.0%
 0.0%
 100.0%
 0.0%
 35
703 LATHE AND TURNING MACHINE SET-UP OPERATORS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 130
723 METAL PLATING MACHINE OPERATORS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 1,606
754 PACKAGING AND FILLING MACHINE OPERATORS 0.0%
 0.0%
 0.0%
 0.0%
 100.0%
 22
766 FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD 0.0%
 0.0%
 0.0%
 0.0%
 100.0%
 626
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 104
783 WELDERS AND CUTTERS 0.0%
 0.0%
 64.1%
 17.9%
 17.9%
 273
785 ASSEMBLERS 19.5%
 0.0%
 25.5%
 54.9%
 0.0%
 1,418
SUBTOTAL 51.5%
 0.0%
 17.2%
 12.5%
 18.6%
 6,857
TRANSPORTATION EQUIPMENT (SIC 37)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
073 CHEMISTS, EXCEPT BIOCHEMISTS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 9
365 STOCK AND INVENTORY CLERKS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 341
453 JANITORS AND CLEANERS 0.0%
 0.0%
 50.0%
 50.0%
 0.0%
 3,056
515 AIRCRAFT MECHANICS, EXC. ENGINE 7.3%
 0.0%
 0.0%
 0.0%
 92.7%
 612
544 MILLWRIGHTS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 1,556
637 MACHINISTS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 148
703 LATHE AND TURNING MACHINE SET-UP OPERATORS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 65
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 450
715 MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 89
723 METAL PLATING MACHINE OPERATORS 0.0%
 0.0%
 50.0%
 50.0%
 0.0%
 273
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 505
783 WELDERS AND CUTTERS 0.3%
 0.0%
 75.0%
 21.8%
 2.9%
 3,070
SUBTOTAL 0.6%
 0.0%
 69.9%
 22.9%
 6.4%
 10,174
INSTRUMENTS AND RELATED PRODUCTS (SIC 38)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
216 ENGINEERING TECHNICIANS, N.E.C. 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 878
235 TECHNICIANS, N.E.C. 0.0%
 0.0%
 0.0%
 33.3%
 66.7%
 177
535 CAMERA, WATCH, AND MUSICAL INSTRUMENT REPAIRERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 1,025
719 MOLDING AND CASTING MACHINE OPERATORS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 22
756 MIXING AND BLENDING MACHINE OPERATORS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 45
783 WELDERS AND CUTTERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 69
SUBTOTAL 3.0%
 0.0%
 88.9%
 2.6%
 5.3%
 2,216
MISCELLANEOUS MANUFACTURING INDUSTRIES (SIC 39)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
675 HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 255
783 WELDERS AND CUTTERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 1,230
889 LABORERS, EXCEPT CONSTRUCTION 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 96
SUBTOTAL 22.2%
 0.0%
 77.7%
 0.0%
 0.0%
 1,581
TRANSPORTATION BY AIR (SIC 45)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
515 AIRCRAFT MECHANICS, EXC. ENGINE 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 60
704 LATHE AND TURNING MACHINE OPERATORS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 335
723 METAL PLATING MACHINE OPERATORS 0.0%
 0.0%
 0.0%
 100.0%
 0.0%
 233
783 WELDERS AND CUTTERS 0.0%
 0.0%
 73.1%
 25.5%
 1.4%
 10,058
SUBTOTAL 3.1%
 0.0%
 69.3%
 26.1%
 1.3%
 10,686
BUSINESS SERVICES (SIC 73)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
224 CHEMICAL TECHNICIANS 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 109
SUBTOTAL 100.0%
 0.0%
 0.0%
 0.0%
 0.0%
 109
HEALTH SERVICES (SIC 80)
Code Occupation Description (1980) No
Control		 Resp
Prot		 Other
PPE
Vent		 Other
Control
Exposures
783 WELDERS AND CUTTERS 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 40
SUBTOTAL 0.0%
 0.0%
 100.0%
 0.0%
 0.0%
 40
TOTAL 24.7%
 0.1%
 58.5%
 14.4%
 2.1%
 99,948
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.

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