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 BENZOYL PEROXIDE
CAS # 94-36-0
RTECS # DM8575000 
Agent Code 11280

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

Vent
Other
Control

Exposures
216 ENGINEERING TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
753
453 JANITORS AND CLEANERS 0.0%
0.0%
0.0%
100.0%
0.0%
2,108
479 FARM WORKERS 0.0%
0.0%
0.0%
100.0%
0.0%
1,355
756 MIXING AND BLENDING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
151
768 CRUSHING AND GRINDING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
301
779 MACHINE OPERATORS, NOT SPECIFIED 0.0%
0.0%
0.0%
100.0%
0.0%
1,205
883 FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
1,205
888 HAND PACKERS AND PACKAGERS 0.0%
0.0%
0.0%
100.0%
0.0%
151
SUBTOTAL 10.4%
0.0%
0.0%
89.5%
0.0%
7,229
GENERAL BUILDING CONTRACTORS (SIC 15)
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%
122
783 WELDERS AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
183
869 CONSTRUCTION LABORERS 100.0%
0.0%
0.0%
0.0%
0.0%
2,191
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
2,496
FOOD AND KINDRED PRODUCTS (SIC 20)
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%
248
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
157
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
248
687 BAKERS 100.0%
0.0%
0.0%
0.0%
0.0%
684
754 PACKAGING AND FILLING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
53
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
497
877 STOCK HANDLERS AND BAGGERS 100.0%
0.0%
0.0%
0.0%
0.0%
248
888 HAND PACKERS AND PACKAGERS 100.0%
0.0%
0.0%
0.0%
0.0%
559
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
2,694
TEXTILE MILL PRODUCTS (SIC 22)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
095 REGISTERED NURSES 100.0%
0.0%
0.0%
0.0%
0.0%
48
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
48
LUMBER AND WOOD PRODUCTS (SIC 24)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
216 ENGINEERING TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
134
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
448
544 MILLWRIGHTS 100.0%
0.0%
0.0%
0.0%
0.0%
45
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
627
FURNITURE AND FIXTURES (SIC 25)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
668 UPHOLSTERERS 0.0%
0.0%
0.0%
100.0%
0.0%
58
SUBTOTAL 0.0%
0.0%
0.0%
100.0%
0.0%
58
PAPER AND ALLIED PRODUCTS (SIC 26)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
734 PRINTING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
2,092
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
110
SUBTOTAL 4.9%
0.0%
95.0%
0.0%
0.0%
2,202
PRINTING AND PUBLISHING (SIC 27)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
213 ELECTRICAL AND ELECTRONIC TECHNICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
114
235 TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
105
734 PRINTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
5,966
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
6,185
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
224 CHEMICAL TECHNICIANS 0.0%
0.0%
0.0%
50.0%
50.0%
917
633 SUPERVISORS, PRODUCTION OCCUPATIONS 0.0%
0.0%
0.0%
66.7%
33.3%
1,650
734 PRINTING MACHINE OPERATORS 0.0%
0.0%
75.0%
25.0%
0.0%
2,549
757 SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS 0.0%
0.0%
0.0%
66.7%
33.3%
3,850
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
37
889 LABORERS, EXCEPT CONSTRUCTION 0.0%
0.0%
0.0%
66.7%
33.3%
688
SUBTOTAL 0.3%
0.0%
19.7%
53.8%
25.9%
9,691
RUBBER AND MISC. PLASTICS PRODUCTS (SIC 30)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
216 ENGINEERING TECHNICIANS, N.E.C. 0.8%
19.8%
59.5%
0.0%
19.8%
2,082
453 JANITORS AND CLEANERS 21.7%
0.0%
52.2%
26.1%
0.0%
1,996
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
308
719 MOLDING AND CASTING MACHINE OPERATORS 0.0%
0.0%
89.2%
10.8%
0.0%
355
723 METAL PLATING MACHINE OPERATORS 0.0%
20.0%
60.0%
0.0%
20.0%
2,606
728 SHAPING AND JOINING MACHINE OPERATORS 0.0%
0.0%
66.7%
33.3%
0.0%
11,722
755 EXTRUDING AND FORMING MACHINE OPERATORS 0.0%
0.0%
50.0%
0.0%
50.0%
272
756 MIXING AND BLENDING MACHINE OPERATORS 50.0%
0.0%
50.0%
0.0%
0.0%
175
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 50.0%
0.0%
50.0%
0.0%
0.0%
349
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
769
779 MACHINE OPERATORS, NOT SPECIFIED 0.0%
0.0%
0.0%
100.0%
0.0%
192
785 ASSEMBLERS 47.1%
0.0%
47.1%
5.8%
0.0%
3,336
SUBTOTAL 9.4%
3.8%
57.7%
24.5%
4.4%
24,162
LEATHER AND LEATHER PRODUCTS (SIC 31)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
669 SHOE REPAIRERS 0.0%
0.0%
0.0%
100.0%
0.0%
97
SUBTOTAL 0.0%
0.0%
0.0%
100.0%
0.0%
97
STONE, CLAY, AND GLASS PRODUCTS (SIC 32)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
507 BUS, TRUCK, AND STATIONARY ENGINE MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
214
549 NOT SPECIFIED MECHANICS AND REPAIRERS 50.0%
0.0%
0.0%
50.0%
0.0%
464
599 CONSTRUCTION TRADES, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
155
756 MIXING AND BLENDING MACHINE OPERATORS 0.0%
0.0%
66.7%
33.3%
0.0%
184
769 SLICING AND CUTTING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
891
785 ASSEMBLERS 11.8%
0.0%
88.2%
0.0%
0.0%
1,567
849 CRANE AND TOWER OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
386
889 LABORERS, EXCEPT CONSTRUCTION 0.0%
0.0%
0.0%
100.0%
0.0%
850
SUBTOTAL 13.3%
0.0%
50.8%
35.7%
0.0%
4,711
PRIMARY METAL INDUSTRIES (SIC 33)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
365 STOCK AND INVENTORY CLERKS 100.0%
0.0%
0.0%
0.0%
0.0%
238
645 PATTERNMAKERS AND MODEL MAKERS, METAL 50.4%
0.0%
49.6%
0.0%
0.0%
314
656 PATTERNMAKERS AND MODEL MAKERS, WOOD 100.0%
0.0%
0.0%
0.0%
0.0%
86
676 PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS 0.0%
0.0%
100.0%
0.0%
0.0%
596
733 MISCELLANEOUS WOODWORKING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
14
763 ROASTING AND BAKING MACHINE OPERATORS, FOOD 100.0%
0.0%
0.0%
0.0%
0.0%
28
SUBTOTAL 39.9%
0.0%
60.0%
0.0%
0.0%
1,276
FABRICATED METAL PRODUCTS (SIC 34)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
507 BUS, TRUCK, AND STATIONARY ENGINE MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
316
676 PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
881
707 ROLLING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
174
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
835
783 WELDERS AND CUTTERS 0.0%
0.0%
66.7%
33.3%
0.0%
6,260
SUBTOTAL 16.1%
0.0%
59.1%
24.6%
0.0%
8,466
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
059 ENGINEERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
83
215 MECHANICAL ENGINEERING TECHNICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
181
217 DRAFTING OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
1,105
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
411
596 SHEETMETAL DUCT INSTALLERS 100.0%
0.0%
0.0%
0.0%
0.0%
244
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
370
675 HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS 0.0%
0.0%
0.0%
100.0%
0.0%
232
676 PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
134
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
178
753 CEMENTING AND GLUING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
128
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
77
783 WELDERS AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
966
785 ASSEMBLERS 25.7%
10.8%
33.6%
29.9%
0.0%
1,187
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 100.0%
0.0%
0.0%
0.0%
0.0%
51
SUBTOTAL 75.8%
2.3%
10.7%
10.9%
0.0%
5,347
ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
633 SUPERVISORS, PRODUCTION OCCUPATIONS 0.0%
0.0%
100.0%
0.0%
0.0%
33
779 MACHINE OPERATORS, NOT SPECIFIED 0.0%
0.0%
100.0%
0.0%
0.0%
12
SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
45
TRANSPORTATION EQUIPMENT (SIC 37)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
216 ENGINEERING TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
7
235 TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
22
515 AIRCRAFT MECHANICS, EXC. ENGINE 100.0%
0.0%
0.0%
0.0%
0.0%
2,836
579 PAINTERS, CONSTRUCTION AND MAINTENANCE 0.0%
0.0%
100.0%
0.0%
0.0%
636
593 INSULATION WORKERS 0.0%
0.0%
100.0%
0.0%
0.0%
295
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
72
683 ELECTRICAL AND ELECTRONIC EQUIPMENT ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
29
703 LATHE AND TURNING MACHINE SET-UP OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
259
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
100.0%
0.0%
0.0%
0.0%
1,335
719 MOLDING AND CASTING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
11
753 CEMENTING AND GLUING MACHINE OPERATORS 23.5%
0.0%
76.5%
0.0%
0.0%
1,689
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
17
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
0.0%
0.0%
0.0%
0.0%
615
783 WELDERS AND CUTTERS 0.0%
0.0%
0.0%
100.0%
0.0%
6
785 ASSEMBLERS 65.6%
0.0%
0.0%
34.4%
0.0%
3,397
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 0.0%
0.0%
0.0%
100.0%
0.0%
26
797 PRODUCTION TESTERS 100.0%
0.0%
0.0%
0.0%
0.0%
36
SUBTOTAL 57.7%
11.8%
19.6%
10.7%
0.0%
11,288
INSTRUMENTS AND RELATED PRODUCTS (SIC 38)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
208 HEALTH TECHNOLOGISTS AND TECHNICIANS, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
1,033
235 TECHNICIANS, N.E.C. 33.3%
0.0%
0.0%
66.7%
0.0%
729
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
0.0%
0.0%
0.0%
0.0%
17,789
785 ASSEMBLERS 0.0%
0.0%
50.0%
50.0%
0.0%
347
888 HAND PACKERS AND PACKAGERS 100.0%
0.0%
0.0%
0.0%
0.0%
220
SUBTOTAL 90.7%
0.0%
0.8%
8.4%
0.0%
20,118
MISCELLANEOUS MANUFACTURING INDUSTRIES (SIC 39)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
1,550
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
2,067
804 TRUCK DRIVERS, HEAVY 0.0%
100.0%
0.0%
0.0%
0.0%
517
SUBTOTAL 87.4%
12.5%
0.0%
0.0%
0.0%
4,134
TRANSPORTATION BY AIR (SIC 45)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
515 AIRCRAFT MECHANICS, EXC. ENGINE 100.0%
0.0%
0.0%
0.0%
0.0%
57
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
43
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
3,317
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
0.0%
50.0%
50.0%
0.0%
62
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
0.0%
0.0%
0.0%
0.0%
79
SUBTOTAL 97.0%
0.0%
0.8%
2.0%
0.0%
3,558
WHOLESALE TRADE - DURABLE GOODS (SIC 50)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
027 PERSONNEL, TRAINING, AND LABOR RELATIONS SPECIALISTS 100.0%
0.0%
0.0%
0.0%
0.0%
5,763
235 TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
861
503 SUPERVISORS, MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
960
514 AUTOMOBILE BODY AND RELATED REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
788
873 PRODUCTION HELPERS 100.0%
0.0%
0.0%
0.0%
0.0%
344
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
8,716
AUTOMOTIVE DEALERS & SERVICE STATIONS (SIC 55)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
153
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
153
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
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
161
BUSINESS SERVICES (SIC 73)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
073 CHEMISTS, EXCEPT BIOCHEMISTS 32.3%
0.0%
0.0%
67.7%
0.0%
578
SUBTOTAL 32.3%
0.0%
0.0%
67.7%
0.0%
578
AUTO REPAIR, SERVICES, AND GARAGES (SIC 75)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
503 SUPERVISORS, MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
1,013
507 BUS, TRUCK, AND STATIONARY ENGINE MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
512
514 AUTOMOBILE BODY AND RELATED REPAIRERS 47.1%
26.5%
26.5%
0.0%
0.0%
33,458
SUBTOTAL 49.4%
25.3%
25.3%
0.0%
0.0%
34,983
HEALTH SERVICES (SIC 80)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
083 MEDICAL SCIENTISTS 0.0%
0.0%
0.0%
100.0%
0.0%
21
084 PHYSICIANS 50.0%
0.0%
50.0%
0.0%
0.0%
1,999
095 REGISTERED NURSES 59.4%
0.0%
29.7%
10.9%
0.0%
2,126
096 PHARMACISTS 0.0%
20.0%
60.0%
20.0%
0.0%
411
207 LICENSED PRACTICAL NURSES 0.0%
0.0%
50.0%
50.0%
0.0%
309
208 HEALTH TECHNOLOGISTS AND TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
3
235 TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
7
445 DENTAL ASSISTANTS 100.0%
0.0%
0.0%
0.0%
0.0%
98
446 HEALTH AIDES, EXCEPT NURSING 0.0%
0.0%
75.0%
25.0%
0.0%
200
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
294
567 CARPENTERS 100.0%
0.0%
0.0%
0.0%
0.0%
28
678 DENTAL LABORATORY AND MEDICAL APPLIANCE TECHNICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
70
SUBTOTAL 49.6%
1.4%
39.2%
9.6%
0.0%
5,566
TOTAL 50.3%
7.2%
24.4%
15.8%
2.1%
164,589
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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