National Occupational Exposure Survey, Estimaged Percentages of Controlled and Uncontrolled Potential Exposures to Specific Agents by Occupation within 2-Digit Standard Industrial Classification (SIC)*

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	SILICON CARBIDE, POWDER
CAS #	409-21-2
RTECS #	VW0450000
Agent Code	X6494

TEXTILE MILL PRODUCTS (SIC 22)

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%
102

SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
102

PAPER AND ALLIED PRODUCTS (SIC 26)

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%
55

SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
55

CHEMICALS AND ALLIED PRODUCTS (SIC 28)

Code Occupation Description (1980) No
Control Resp
Prot Other
PPE
Vent Other
Control
Exposures

518 INDUSTRIAL MACHINERY REPAIRERS 0.0%
0.0%
50.0%
0.0%
50.0%
39

585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 0.0%
0.0%
50.0%
0.0%
50.0%
1,364

637 MACHINISTS 0.0%
0.0%
50.0%
0.0%
50.0%
553

783 WELDERS AND CUTTERS 0.0%
0.0%
50.0%
0.0%
50.0%
888

SUBTOTAL 0.0%
0.0%
50.0%
0.0%
50.0%
2,844

PETROLEUM AND COAL PRODUCTS (SIC 29)

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%
351

699 MISCELLANEOUS PLANT AND SYSTEM OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
703

SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
1,054

PRIMARY METAL INDUSTRIES (SIC 33)

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%
379

645 PATTERNMAKERS AND MODEL MAKERS, METAL 0.0%
0.0%
100.0%
0.0%
0.0%
78

709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
58

SUBTOTAL 11.2%
0.0%
88.7%
0.0%
0.0%
515

FABRICATED METAL PRODUCTS (SIC 34)

Code Occupation Description (1980) No
Control Resp
Prot Other
PPE
Vent Other
Control
Exposures

637 MACHINISTS 0.0%
0.0%
0.0%
100.0%
0.0%
579

644 PRECISION GRINDERS, FITTERS, AND TOOL SHARPENERS 100.0%
0.0%
0.0%
0.0%
0.0%
54

707 ROLLING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
1,373

SUBTOTAL 71.1%
0.0%
0.0%
28.8%
0.0%
2,006

MACHINERY, EXCEPT ELECTRICAL (SIC 35)

Code Occupation Description (1980) No
Control Resp
Prot Other
PPE
Vent Other
Control
Exposures

518 INDUSTRIAL MACHINERY REPAIRERS 0.0%
0.0%
50.0%
50.0%
0.0%
6,450

634 TOOL AND DIE MAKERS 0.0%
0.0%
100.0%
0.0%
0.0%
5,289

635 TOOL AND DIE MAKER APPRENTICES 0.0%
0.0%
100.0%
0.0%
0.0%
584

637 MACHINISTS 0.0%
0.0%
100.0%
0.0%
0.0%
1,126

709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
0.0%
81.3%
18.7%
0.0%
1,327

779 MACHINE OPERATORS, NOT SPECIFIED 0.0%
0.0%
100.0%
0.0%
0.0%
1,087

SUBTOTAL 0.0%
0.0%
78.1%
21.8%
0.0%
15,863

ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)

Code Occupation Description (1980) No
Control Resp
Prot Other
PPE
Vent Other
Control
Exposures

637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
5,156

644 PRECISION GRINDERS, FITTERS, AND TOOL SHARPENERS 100.0%
0.0%
0.0%
0.0%
0.0%
5

709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
0.0%
50.0%
50.0%
0.0%
10

SUBTOTAL 99.8%
0.0%
9.6%
9.6%
0.0%
5,171

TRANSPORTATION EQUIPMENT (SIC 37)

Code Occupation Description (1980) No
Control Resp
Prot Other
PPE
Vent Other
Control
Exposures

365 STOCK AND INVENTORY CLERKS 0.0%
0.0%
100.0%
0.0%
0.0%
552

684 MISCELLANEOUS PRECISION WORKERS, N.E.C. 0.0%
0.0%
50.0%
50.0%
0.0%
34

709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 34.5%
0.0%
65.5%
0.0%
0.0%
4,260

SUBTOTAL 30.3%
0.0%
69.3%
0.3%
0.0%
4,846

INSTRUMENTS AND RELATED PRODUCTS (SIC 38)

Code Occupation Description (1980) No
Control Resp
Prot Other
PPE
Vent Other
Control
Exposures

637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
196

684 MISCELLANEOUS PRECISION WORKERS, N.E.C. 0.0%
0.0%
66.7%
33.3%
0.0%
1,308

706 PUNCHING AND STAMPING PRESS MACHINE OPERATORS 0.0%
0.0%
66.7%
33.3%
0.0%
773

719 MOLDING AND CASTING MACHINE OPERATORS 0.0%
0.0%
66.7%
33.3%
0.0%
833

769 SLICING AND CUTTING MACHINE OPERATORS 0.0%
0.0%
66.7%
33.3%
0.0%
952

SUBTOTAL 4.8%
0.0%
63.4%
31.6%
0.0%
4,062

MISCELLANEOUS MANUFACTURING INDUSTRIES (SIC 39)

Code Occupation Description (1980) No
Control Resp
Prot Other
PPE
Vent Other
Control
Exposures

259 SALES REPRESENTATIVES, MINING, MANUFACTURING, AND WHOLESALE 100.0%
0.0%
0.0%
0.0%
0.0%
3,298

547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
733

647 PRECIOUS STONES AND METALS WORKERS (JEWELERS) 100.0%
0.0%
0.0%
0.0%
0.0%
366

709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
366

SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
4,763

TOTAL 34.2%
0.0%
49.3%
12.9%
3.4%
41,281

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.

TEXTILE MILL PRODUCTS (SIC 22)
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%	102
SUBTOTAL		0.0%	0.0%	100.0%	0.0%	0.0%	102
PAPER AND ALLIED PRODUCTS (SIC 26)
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%	55
SUBTOTAL		0.0%	0.0%	100.0%	0.0%	0.0%	55
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
518	INDUSTRIAL MACHINERY REPAIRERS	0.0%	0.0%	50.0%	0.0%	50.0%	39
585	PLUMBERS, PIPEFITTERS, AND STEAMFITTERS	0.0%	0.0%	50.0%	0.0%	50.0%	1,364
637	MACHINISTS	0.0%	0.0%	50.0%	0.0%	50.0%	553
783	WELDERS AND CUTTERS	0.0%	0.0%	50.0%	0.0%	50.0%	888
SUBTOTAL		0.0%	0.0%	50.0%	0.0%	50.0%	2,844
PETROLEUM AND COAL PRODUCTS (SIC 29)
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%	351
699	MISCELLANEOUS PLANT AND SYSTEM OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	703
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	1,054
PRIMARY METAL INDUSTRIES (SIC 33)
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%	379
645	PATTERNMAKERS AND MODEL MAKERS, METAL	0.0%	0.0%	100.0%	0.0%	0.0%	78
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	58
SUBTOTAL		11.2%	0.0%	88.7%	0.0%	0.0%	515
FABRICATED METAL PRODUCTS (SIC 34)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
637	MACHINISTS	0.0%	0.0%	0.0%	100.0%	0.0%	579
644	PRECISION GRINDERS, FITTERS, AND TOOL SHARPENERS	100.0%	0.0%	0.0%	0.0%	0.0%	54
707	ROLLING MACHINE OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	1,373
SUBTOTAL		71.1%	0.0%	0.0%	28.8%	0.0%	2,006
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
518	INDUSTRIAL MACHINERY REPAIRERS	0.0%	0.0%	50.0%	50.0%	0.0%	6,450
634	TOOL AND DIE MAKERS	0.0%	0.0%	100.0%	0.0%	0.0%	5,289
635	TOOL AND DIE MAKER APPRENTICES	0.0%	0.0%	100.0%	0.0%	0.0%	584
637	MACHINISTS	0.0%	0.0%	100.0%	0.0%	0.0%	1,126
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	0.0%	0.0%	81.3%	18.7%	0.0%	1,327
779	MACHINE OPERATORS, NOT SPECIFIED	0.0%	0.0%	100.0%	0.0%	0.0%	1,087
SUBTOTAL		0.0%	0.0%	78.1%	21.8%	0.0%	15,863
ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
637	MACHINISTS	100.0%	0.0%	0.0%	0.0%	0.0%	5,156
644	PRECISION GRINDERS, FITTERS, AND TOOL SHARPENERS	100.0%	0.0%	0.0%	0.0%	0.0%	5
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	0.0%	0.0%	50.0%	50.0%	0.0%	10
SUBTOTAL		99.8%	0.0%	9.6%	9.6%	0.0%	5,171
TRANSPORTATION EQUIPMENT (SIC 37)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
365	STOCK AND INVENTORY CLERKS	0.0%	0.0%	100.0%	0.0%	0.0%	552
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	0.0%	0.0%	50.0%	50.0%	0.0%	34
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	34.5%	0.0%	65.5%	0.0%	0.0%	4,260
SUBTOTAL		30.3%	0.0%	69.3%	0.3%	0.0%	4,846
INSTRUMENTS AND RELATED PRODUCTS (SIC 38)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
637	MACHINISTS	100.0%	0.0%	0.0%	0.0%	0.0%	196
684	MISCELLANEOUS PRECISION WORKERS, N.E.C.	0.0%	0.0%	66.7%	33.3%	0.0%	1,308
706	PUNCHING AND STAMPING PRESS MACHINE OPERATORS	0.0%	0.0%	66.7%	33.3%	0.0%	773
719	MOLDING AND CASTING MACHINE OPERATORS	0.0%	0.0%	66.7%	33.3%	0.0%	833
769	SLICING AND CUTTING MACHINE OPERATORS	0.0%	0.0%	66.7%	33.3%	0.0%	952
SUBTOTAL		4.8%	0.0%	63.4%	31.6%	0.0%	4,062
MISCELLANEOUS MANUFACTURING INDUSTRIES (SIC 39)
Code	Occupation Description (1980)	No Control	Resp Prot	Other PPE	Vent	Other Control	Exposures
259	SALES REPRESENTATIVES, MINING, MANUFACTURING, AND WHOLESALE	100.0%	0.0%	0.0%	0.0%	0.0%	3,298
547	SPECIFIED MECHANICS AND REPAIRERS, N.E.C.	100.0%	0.0%	0.0%	0.0%	0.0%	733
647	PRECIOUS STONES AND METALS WORKERS (JEWELERS)	100.0%	0.0%	0.0%	0.0%	0.0%	366
709	GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS	100.0%	0.0%	0.0%	0.0%	0.0%	366
SUBTOTAL		100.0%	0.0%	0.0%	0.0%	0.0%	4,763
TOTAL		34.2%	0.0%	49.3%	12.9%	3.4%	41,281
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

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)*

National Occupational Exposure Survey
(1981 - 1983)