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 THIOUREA
CAS # 62-56-6
RTECS # YU2800000 
Agent Code 82272

AGRICULTURAL SERVICES (SIC 07)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
487 ANIMAL CARETAKERS, EXCEPT FARM 100.0%
0.0%
0.0%
0.0%
0.0%
589
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
589
GENERAL BUILDING CONTRACTORS (SIC 15)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
059 ENGINEERS, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
1,394
SUBTOTAL 0.0%
0.0%
0.0%
100.0%
0.0%
1,394
SPECIAL TRADE CONTRACTORS (SIC 17)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
217 DRAFTING OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
578
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
578
LUMBER AND WOOD PRODUCTS (SIC 24)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
217 DRAFTING OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
2,041
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
2,041
PAPER AND ALLIED PRODUCTS (SIC 26)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
217 DRAFTING OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
343
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
343
PRINTING AND PUBLISHING (SIC 27)
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%
135
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
135
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
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%
418
224 CHEMICAL TECHNICIANS 97.3%
0.0%
0.0%
2.7%
0.0%
3,366
235 TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
512
453 JANITORS AND CLEANERS 72.1%
0.0%
0.0%
27.9%
0.0%
457
519 MACHINERY MAINTENANCE OCCUPATIONS 0.0%
0.0%
0.0%
100.0%
0.0%
22
549 NOT SPECIFIED MECHANICS AND REPAIRERS 0.0%
0.0%
0.0%
100.0%
0.0%
470
567 CARPENTERS 0.0%
0.0%
0.0%
100.0%
0.0%
57
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 0.0%
0.0%
0.0%
100.0%
0.0%
44
593 INSULATION WORKERS 0.0%
0.0%
0.0%
100.0%
0.0%
44
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
93
637 MACHINISTS 0.0%
0.0%
0.0%
100.0%
0.0%
57
653 SHEET METAL WORKERS 0.0%
0.0%
0.0%
100.0%
0.0%
75
694 WATER AND SEWAGE TREATMENT PLANT OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
66
699 MISCELLANEOUS PLANT AND SYSTEM OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
79
756 MIXING AND BLENDING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
18
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
57
766 FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD 0.0%
0.0%
0.0%
100.0%
0.0%
18
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
158
779 MACHINE OPERATORS, NOT SPECIFIED 0.0%
0.0%
40.0%
20.0%
40.0%
257
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 0.0%
0.0%
0.0%
100.0%
0.0%
9
889 LABORERS, EXCEPT CONSTRUCTION 100.0%
0.0%
0.0%
0.0%
0.0%
165
SUBTOTAL 74.3%
0.0%
1.5%
22.4%
1.5%
6,442
PRIMARY METAL INDUSTRIES (SIC 33)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
707 ROLLING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
658
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 50.0%
0.0%
0.0%
50.0%
0.0%
21
779 MACHINE OPERATORS, NOT SPECIFIED 85.6%
0.0%
0.0%
14.4%
0.0%
514
797 PRODUCTION TESTERS 0.0%
0.0%
100.0%
0.0%
0.0%
41
889 LABORERS, EXCEPT CONSTRUCTION 0.0%
0.0%
92.6%
7.4%
0.0%
289
SUBTOTAL 29.5%
0.0%
63.4%
6.9%
0.0%
1,523
FABRICATED METAL PRODUCTS (SIC 34)
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%
322
637 MACHINISTS 0.0%
0.0%
100.0%
0.0%
0.0%
803
696 STATIONARY ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
16
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
289
717 FABRICATING MACHINE OPERATORS, N.E.C. 40.7%
0.0%
29.7%
29.7%
0.0%
1,086
723 METAL PLATING MACHINE OPERATORS 28.7%
0.0%
36.2%
35.2%
0.0%
16,779
725 MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
1,127
785 ASSEMBLERS 0.0%
0.0%
100.0%
0.0%
0.0%
131
873 PRODUCTION HELPERS 0.0%
0.0%
50.0%
50.0%
0.0%
1,810
878 MACHINE FEEDERS AND OFFBEARERS 100.0%
0.0%
0.0%
0.0%
0.0%
1,155
887 VEHICLE WASHERS AND EQUIPMENT CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
289
SUBTOTAL 35.5%
0.0%
34.5%
29.9%
0.0%
23,807
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
057 MECHANICAL ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
463
235 TECHNICIANS, N.E.C. 0.0%
0.0%
50.0%
50.0%
0.0%
1,645
453 JANITORS AND CLEANERS 50.0%
0.0%
25.0%
25.0%
0.0%
1,645
723 METAL PLATING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
62
774 PHOTOGRAPHIC PROCESS MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
753
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.0%
0.0%
6.6%
93.4%
0.0%
626
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
465
793 HAND ENGRAVING AND PRINTING OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
526
SUBTOTAL 48.9%
0.0%
20.6%
30.4%
0.0%
6,185
ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
048 CHEMICAL ENGINEERS 0.0%
0.0%
100.0%
0.0%
0.0%
14
213 ELECTRICAL AND ELECTRONIC TECHNICIANS 82.0%
0.0%
14.4%
3.6%
0.0%
128
216 ENGINEERING TECHNICIANS, N.E.C. 0.0%
0.0%
75.0%
25.0%
0.0%
96
224 CHEMICAL TECHNICIANS 0.0%
0.0%
50.0%
50.0%
0.0%
51
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 0.0%
0.0%
75.0%
25.0%
0.0%
9
675 HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS 0.0%
0.0%
100.0%
0.0%
0.0%
17
723 METAL PLATING MACHINE OPERATORS 1.7%
0.0%
61.5%
21.3%
15.4%
10,407
749 MISCELLANEOUS TEXTILE MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
52
774 PHOTOGRAPHIC PROCESS MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
55
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 22.7%
0.0%
17.4%
60.0%
0.0%
532
779 MACHINE OPERATORS, NOT SPECIFIED 0.0%
0.0%
0.0%
100.0%
0.0%
74
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 0.0%
0.0%
100.0%
0.0%
0.0%
23
887 VEHICLE WASHERS AND EQUIPMENT CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
793
889 LABORERS, EXCEPT CONSTRUCTION 0.0%
0.0%
0.0%
100.0%
0.0%
493
SUBTOTAL 10.2%
0.0%
52.3%
24.7%
12.5%
12,744
TRANSPORTATION EQUIPMENT (SIC 37)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
055 ELECTRICAL AND ELECTRONIC ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
144
189 PHOTOGRAPHERS 0.0%
0.0%
0.0%
0.0%
100.0%
22
217 DRAFTING OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
150
649 ENGRAVERS, METAL 25.0%
0.0%
50.0%
25.0%
0.0%
404
723 METAL PLATING MACHINE OPERATORS 14.6%
0.0%
52.1%
33.3%
0.0%
273
724 HEAT TREATING EQUIPMENT OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
8
734 PRINTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
3
735 PHOTOENGRAVERS AND LITHOGRAPHERS 0.0%
0.0%
100.0%
0.0%
0.0%
144
766 FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD 0.0%
0.0%
100.0%
0.0%
0.0%
258
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
50
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
0.0%
0.0%
0.0%
0.0%
1,962
785 ASSEMBLERS 0.0%
0.0%
100.0%
0.0%
0.0%
23
SUBTOTAL 71.1%
0.0%
22.5%
5.5%
0.6%
3,441
INSTRUMENTS AND RELATED PRODUCTS (SIC 38)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
073 CHEMISTS, EXCEPT BIOCHEMISTS 0.0%
0.0%
66.7%
33.3%
0.0%
413
217 DRAFTING OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
159
235 TECHNICIANS, N.E.C. 16.9%
0.0%
55.4%
27.7%
0.0%
596
374 MATERIAL RECORDING, SCHEDULING, AND DISTRIBUTING CLERKS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
18
533 MISCELLANEOUS ELECTRICAL AND ELECTRONIC EQUIPMENT REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
116
683 ELECTRICAL AND ELECTRONIC EQUIPMENT ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
2,860
723 METAL PLATING MACHINE OPERATORS 0.0%
0.0%
66.7%
33.3%
0.0%
661
774 PHOTOGRAPHIC PROCESS MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
1,513
785 ASSEMBLERS 50.0%
0.0%
50.0%
0.0%
0.0%
347
SUBTOTAL 73.9%
0.0%
18.2%
7.8%
0.0%
6,683
TRUCKING AND WAREHOUSING (SIC 42)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
723 METAL PLATING MACHINE OPERATORS 20.0%
0.0%
60.0%
20.0%
0.0%
3,033
SUBTOTAL 20.0%
0.0%
60.0%
20.0%
0.0%
3,033
TRANSPORTATION BY AIR (SIC 45)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
723 METAL PLATING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
131
SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
131
PERSONAL SERVICES (SIC 72)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
696 STATIONARY ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
161
748 LAUNDERING AND DRY CLEANING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
257
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
418
BUSINESS SERVICES (SIC 73)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
188 PAINTERS, SCULPTORS, CRAFT-ARTISTS, AND ARTIST PRINTMAKERS 100.0%
0.0%
0.0%
0.0%
0.0%
975
216 ENGINEERING TECHNICIANS, N.E.C. 0.0%
0.0%
66.7%
33.3%
0.0%
21
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
551
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
1,103
SUBTOTAL 99.2%
0.0%
0.5%
0.2%
0.0%
2,650
HEALTH SERVICES (SIC 80)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
203 CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS 36.9%
0.0%
36.8%
26.3%
0.0%
3,382
216 ENGINEERING TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
424
224 CHEMICAL TECHNICIANS 14.5%
0.0%
64.2%
21.4%
0.0%
561
446 HEALTH AIDES, EXCEPT NURSING 100.0%
0.0%
0.0%
0.0%
0.0%
28
449 MAIDS AND HOUSEMEN 0.0%
0.0%
100.0%
0.0%
0.0%
34
SUBTOTAL 40.2%
0.0%
37.0%
22.7%
0.0%
4,429
MUSEUMS, BOTANICAL, ZOOLOGICAL GARDENS (SIC 84)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
189 PHOTOGRAPHERS 0.0%
0.0%
100.0%
0.0%
0.0%
92
SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
92
TOTAL 45.0%
0.0%
29.9%
22.7%
2.2%
76,658
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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