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 LANOLIN (CAS#=8020846)
CAS # 8020-84-6
RTECS #  
Agent Code X1425

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

Vent
Other
Control

Exposures
086 VETERINARIANS 100.0%
0.0%
0.0%
0.0%
0.0%
1,472
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%
2,061
HEAVY CONSTRUCTION CONTRACTORS (SIC 16)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
597 STRUCTURAL METAL WORKERS 100.0%
0.0%
0.0%
0.0%
0.0%
1,319
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
1,319
FOOD AND KINDRED PRODUCTS (SIC 20)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
453 JANITORS AND CLEANERS 74.7%
0.0%
25.3%
0.0%
0.0%
1,748
549 NOT SPECIFIED MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
31
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
154
696 STATIONARY ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
282
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
51
SUBTOTAL 80.4%
0.0%
19.5%
0.0%
0.0%
2,266
TEXTILE MILL PRODUCTS (SIC 22)
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%
962
518 INDUSTRIAL MACHINERY REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
104
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
550
549 NOT SPECIFIED MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
240
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
0.0%
0.0%
0.0%
0.0%
1,586
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 100.0%
0.0%
0.0%
0.0%
0.0%
120
859 MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
1,100
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
4,662
LUMBER AND WOOD PRODUCTS (SIC 24)
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%
97
727 SAWING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
2,775
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
2,872
FURNITURE AND FIXTURES (SIC 25)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
653 SHEET METAL WORKERS 0.0%
0.0%
100.0%
0.0%
0.0%
338
708 DRILLING AND BORING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
169
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.0%
0.0%
100.0%
0.0%
0.0%
177
SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
684
PAPER AND ALLIED PRODUCTS (SIC 26)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
769 SLICING AND CUTTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
218
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
218
PRINTING AND PUBLISHING (SIC 27)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
549 NOT SPECIFIED MECHANICS AND REPAIRERS 16.9%
0.0%
0.0%
83.1%
0.0%
82
645 PATTERNMAKERS AND MODEL MAKERS, METAL 100.0%
0.0%
0.0%
0.0%
0.0%
250
736 TYPESETTERS AND COMPOSITORS 100.0%
0.0%
0.0%
0.0%
0.0%
289
779 MACHINE OPERATORS, NOT SPECIFIED 0.0%
0.0%
100.0%
0.0%
0.0%
103
SUBTOTAL 76.3%
0.0%
14.2%
9.4%
0.0%
724
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
783 WELDERS AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
257
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
257
RUBBER AND MISC. PLASTICS PRODUCTS (SIC 30)
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%
443
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
443
STONE, CLAY, AND GLASS PRODUCTS (SIC 32)
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%
1,756
549 NOT SPECIFIED MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
476
575 ELECTRICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
38
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
123
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
2,393
PRIMARY METAL INDUSTRIES (SIC 33)
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%
1,508
519 MACHINERY MAINTENANCE OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
92
575 ELECTRICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
331
634 TOOL AND DIE MAKERS 100.0%
0.0%
0.0%
0.0%
0.0%
280
719 MOLDING AND CASTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
319
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
27
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
2,557
FABRICATED METAL PRODUCTS (SIC 34)
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%
119
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
253
518 INDUSTRIAL MACHINERY REPAIRERS 45.5%
0.0%
54.5%
0.0%
0.0%
165
544 MILLWRIGHTS 0.0%
0.0%
100.0%
0.0%
0.0%
192
597 STRUCTURAL METAL WORKERS 0.0%
0.0%
0.0%
100.0%
0.0%
1,599
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
271
634 TOOL AND DIE MAKERS 100.0%
0.0%
0.0%
0.0%
0.0%
730
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
2,440
704 LATHE AND TURNING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
171
706 PUNCHING AND STAMPING PRESS MACHINE OPERATORS 92.7%
0.0%
7.3%
0.0%
0.0%
1,273
707 ROLLING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
40
708 DRILLING AND BORING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
486
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
5,646
724 HEAT TREATING EQUIPMENT OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
6
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
0.0%
0.0%
0.0%
0.0%
267
783 WELDERS AND CUTTERS 0.0%
0.0%
0.0%
100.0%
0.0%
1,827
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 100.0%
0.0%
0.0%
0.0%
0.0%
86
SUBTOTAL 39.2%
0.0%
38.7%
22.0%
0.0%
15,571
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
215 MECHANICAL ENGINEERING TECHNICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
123
216 ENGINEERING TECHNICIANS, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
104
225 SCIENCE TECHNICIANS, N.E.C. 0.0%
0.0%
50.0%
50.0%
0.0%
411
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
649
633 SUPERVISORS, PRODUCTION OCCUPATIONS 0.0%
0.0%
100.0%
0.0%
0.0%
123
634 TOOL AND DIE MAKERS 0.0%
0.0%
100.0%
0.0%
0.0%
1,235
637 MACHINISTS 44.4%
0.0%
21.5%
34.1%
0.0%
10,156
684 MISCELLANEOUS PRECISION WORKERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
261
704 LATHE AND TURNING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
190
705 MILLING AND PLANING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
1,372
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
1,034
714 NUMERICAL CONTROL MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
237
769 SLICING AND CUTTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
12
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
0.0%
0.0%
0.0%
0.0%
1,379
783 WELDERS AND CUTTERS 83.3%
0.0%
16.7%
0.0%
0.0%
1,480
785 ASSEMBLERS 72.5%
0.0%
27.5%
0.0%
0.0%
897
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 84.2%
0.0%
15.8%
0.0%
0.0%
391
873 PRODUCTION HELPERS 100.0%
0.0%
0.0%
0.0%
0.0%
347
SUBTOTAL 60.4%
0.0%
21.0%
18.4%
0.0%
20,401
ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
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%
29
518 INDUSTRIAL MACHINERY REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
66
633 SUPERVISORS, PRODUCTION OCCUPATIONS 0.0%
0.0%
100.0%
0.0%
0.0%
33
634 TOOL AND DIE MAKERS 100.0%
0.0%
0.0%
0.0%
0.0%
832
637 MACHINISTS 94.7%
0.0%
5.3%
0.0%
0.0%
2,348
653 SHEET METAL WORKERS 0.0%
0.0%
100.0%
0.0%
0.0%
347
706 PUNCHING AND STAMPING PRESS MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
618
717 FABRICATING MACHINE OPERATORS, N.E.C. 0.0%
0.0%
100.0%
0.0%
0.0%
397
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
69
785 ASSEMBLERS 50.9%
0.0%
49.1%
0.0%
0.0%
114
SUBTOTAL 80.2%
0.0%
19.7%
0.0%
0.0%
4,853
TRANSPORTATION EQUIPMENT (SIC 37)
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%
86
215 MECHANICAL ENGINEERING TECHNICIANS 0.0%
0.0%
0.0%
100.0%
0.0%
567
364 TRAFFIC, SHIPPING, AND RECEIVING CLERKS 0.0%
0.0%
0.0%
100.0%
0.0%
244
453 JANITORS AND CLEANERS 0.0%
0.0%
0.0%
100.0%
0.0%
1,528
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
28
575 ELECTRICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
52
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 100.0%
0.0%
0.0%
0.0%
0.0%
144
596 SHEETMETAL DUCT INSTALLERS 100.0%
0.0%
0.0%
0.0%
0.0%
395
634 TOOL AND DIE MAKERS 100.0%
0.0%
0.0%
0.0%
0.0%
611
637 MACHINISTS 10.1%
0.0%
35.5%
54.5%
0.0%
5,914
653 SHEET METAL WORKERS 100.0%
0.0%
0.0%
0.0%
0.0%
86
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
1,109
723 METAL PLATING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
10
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
454
783 WELDERS AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
7
785 ASSEMBLERS 0.0%
0.0%
50.0%
50.0%
0.0%
216
856 INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
70
888 HAND PACKERS AND PACKAGERS 0.0%
0.0%
0.0%
100.0%
0.0%
306
889 LABORERS, EXCEPT CONSTRUCTION 0.0%
0.0%
0.0%
100.0%
0.0%
1,240
SUBTOTAL 18.9%
0.0%
16.8%
64.2%
0.0%
13,067
INSTRUMENTS AND RELATED PRODUCTS (SIC 38)
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
549 NOT SPECIFIED MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
662
634 TOOL AND DIE MAKERS 100.0%
0.0%
0.0%
0.0%
0.0%
662
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
578
645 PATTERNMAKERS AND MODEL MAKERS, METAL 100.0%
0.0%
0.0%
0.0%
0.0%
2,386
684 MISCELLANEOUS PRECISION WORKERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
110
705 MILLING AND PLANING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
30
719 MOLDING AND CASTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
233
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
140
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
4,923
MISCELLANEOUS MANUFACTURING INDUSTRIES (SIC 39)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
235 TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
100
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
50
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
150
TRUCKING AND WAREHOUSING (SIC 42)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
335 FILE CLERKS 100.0%
0.0%
0.0%
0.0%
0.0%
15
533 MISCELLANEOUS ELECTRICAL AND ELECTRONIC EQUIPMENT REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
50
538 OFFICE MACHINE REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
126
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
553
889 LABORERS, EXCEPT CONSTRUCTION 0.0%
0.0%
0.0%
100.0%
0.0%
490
SUBTOTAL 60.2%
0.0%
0.0%
39.7%
0.0%
1,234
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%
196
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
196
ELECTRIC, GAS, AND SANITARY SERVICES (SIC 49)
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%
215
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
215
WHOLESALE TRADE - DURABLE GOODS (SIC 50)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
505 AUTOMOBILE MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
1,267
514 AUTOMOBILE BODY AND RELATED REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
507
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
1,267
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
3,041
WHOLESALE TRADE - NONDURABLE GOODS (SIC 51)
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%
2,156
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
2,156
PERSONAL SERVICES (SIC 72)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
019 MANAGERS AND ADMINISTRATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
299
274 SALES WORKERS, OTHER COMMODITIES 100.0%
0.0%
0.0%
0.0%
0.0%
299
888 HAND PACKERS AND PACKAGERS 100.0%
0.0%
0.0%
0.0%
0.0%
299
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
897
BUSINESS SERVICES (SIC 73)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
526 HOUSEHOLD APPLIANCE AND POWER TOOL REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
35
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
35
AUTO REPAIR, SERVICES, AND GARAGES (SIC 75)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
505 AUTOMOBILE MECHANICS 0.0%
0.0%
100.0%
0.0%
0.0%
1,656
SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
1,656
HEALTH SERVICES (SIC 80)
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%
524
459 ATTENDANTS, AMUSEMENT AND RECREATION FACILITIES 100.0%
0.0%
0.0%
0.0%
0.0%
187
518 INDUSTRIAL MACHINERY REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
437
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
12
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 0.0%
0.0%
100.0%
0.0%
0.0%
164
575 ELECTRICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
123
637 MACHINISTS 0.0%
0.0%
100.0%
0.0%
0.0%
14
SUBTOTAL 87.8%
0.0%
12.1%
0.0%
0.0%
1,461
TOTAL 63.7%
0.0%
18.3%
17.8%
0.0%
90,312
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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