| Agent Name | DEPRESSED TEMPERATURE |
| CAS # | |
| RTECS # | |
| Agent Code | P0720 |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 575 | ELECTRICIANS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
3,912 |
| 869 | CONSTRUCTION LABORERS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
1,940 |
| SUBTOTAL | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
5,852 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 563 | BRICKMASONS AND STONEMASONS | 55.5% |
0.0% |
44.5% |
0.0% |
0.0% |
17,829 |
| 869 | CONSTRUCTION LABORERS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
2,847 |
| SUBTOTAL | 47.8% |
0.0% |
52.1% |
0.0% |
0.0% |
20,676 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 019 | MANAGERS AND ADMINISTRATORS, N.E.C. | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
232 |
| 073 | CHEMISTS, EXCEPT BIOCHEMISTS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
322 |
| 364 | TRAFFIC, SHIPPING, AND RECEIVING CLERKS | 9.0% |
0.0% |
90.9% |
0.0% |
0.0% |
9,164 |
| 365 | STOCK AND INVENTORY CLERKS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
65 |
| 368 | WEIGHERS, MEASURERS, AND CHECKERS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
1,453 |
| 435 | WAITERS AND WAITRESSES | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
1,438 |
| 444 | MISCELLANEOUS FOOD PREPARATION OCCUPATIONS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
482 |
| 453 | JANITORS AND CLEANERS | 67.8% |
0.0% |
32.2% |
0.0% |
0.0% |
7,214 |
| 518 | INDUSTRIAL MACHINERY REPAIRERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
269 |
| 519 | MACHINERY MAINTENANCE OCCUPATIONS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
127 |
| 547 | SPECIFIED MECHANICS AND REPAIRERS, N.E.C. | 50.7% |
0.0% |
49.3% |
0.0% |
0.0% |
2,499 |
| 549 | NOT SPECIFIED MECHANICS AND REPAIRERS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
438 |
| 633 | SUPERVISORS, PRODUCTION OCCUPATIONS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
2,081 |
| 686 | BUTCHERS AND MEAT CUTTERS | 9.3% |
0.0% |
90.7% |
0.0% |
0.0% |
49,900 |
| 687 | BAKERS | 57.1% |
0.0% |
42.9% |
0.0% |
0.0% |
4,387 |
| 754 | PACKAGING AND FILLING MACHINE OPERATORS | 14.8% |
0.0% |
85.2% |
0.0% |
0.0% |
5,662 |
| 756 | MIXING AND BLENDING MACHINE OPERATORS | 5.2% |
0.0% |
94.7% |
0.0% |
0.0% |
8,474 |
| 757 | SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS | 45.9% |
0.0% |
54.1% |
0.0% |
0.0% |
239 |
| 758 | COMPRESSING AND COMPACTING MACHINE OPERATORS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
1,134 |
| 764 | WASHING, CLEANING, AND PICKLING MACHINE OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
485 |
| 766 | FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
181 |
| 768 | CRUSHING AND GRINDING MACHINE OPERATORS | 38.6% |
0.0% |
61.4% |
0.0% |
0.0% |
6,152 |
| 769 | SLICING AND CUTTING MACHINE OPERATORS | 5.0% |
0.0% |
95.0% |
0.0% |
0.0% |
898 |
| 777 | MISCELLANEOUS MACHINE OPERATORS, N.E.C. | 14.2% |
0.0% |
85.4% |
0.0% |
0.4% |
9,115 |
| 779 | MACHINE OPERATORS, NOT SPECIFIED | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
113 |
| 786 | HAND CUTTING AND TRIMMING OCCUPATIONS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
1,639 |
| 796 | PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS | 74.7% |
0.0% |
25.3% |
0.0% |
0.0% |
738 |
| 799 | GRADERS AND SORTERS, EXCEPT AGRICULTURAL | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
271 |
| 804 | TRUCK DRIVERS, HEAVY | 96.8% |
0.0% |
3.2% |
0.0% |
0.0% |
6,885 |
| 806 | DRIVER-SALES WORKERS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
107 |
| 856 | INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS | 40.1% |
0.0% |
56.5% |
0.0% |
3.4% |
7,585 |
| 859 | MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS | 87.4% |
0.0% |
12.6% |
0.0% |
0.0% |
1,130 |
| 869 | CONSTRUCTION LABORERS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
121 |
| 873 | PRODUCTION HELPERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
54 |
| 877 | STOCK HANDLERS AND BAGGERS | 71.7% |
0.0% |
28.3% |
0.0% |
0.0% |
473 |
| 878 | MACHINE FEEDERS AND OFFBEARERS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
161 |
| 883 | FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C. | 23.2% |
0.0% |
76.8% |
0.0% |
0.0% |
5,982 |
| 887 | VEHICLE WASHERS AND EQUIPMENT CLEANERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
1,077 |
| 888 | HAND PACKERS AND PACKAGERS | 14.0% |
0.0% |
86.0% |
0.0% |
0.0% |
40,063 |
| 889 | LABORERS, EXCEPT CONSTRUCTION | 59.0% |
0.0% |
41.0% |
0.0% |
0.0% |
15,088 |
| SUBTOTAL | 26.3% |
0.0% |
73.4% |
0.0% |
0.1% |
193,898 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 444 | MISCELLANEOUS FOOD PREPARATION OCCUPATIONS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
398 |
| SUBTOTAL | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
398 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 713 | FORGING MACHINE OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
1,176 |
| 777 | MISCELLANEOUS MACHINE OPERATORS, N.E.C. | 97.1% |
0.0% |
0.0% |
0.0% |
2.9% |
4,441 |
| 849 | CRANE AND TOWER OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
392 |
| 856 | INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
1,176 |
| 889 | LABORERS, EXCEPT CONSTRUCTION | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
5,094 |
| SUBTOTAL | 98.9% |
0.0% |
0.0% |
0.0% |
1.0% |
12,279 | |
| 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% |
531 |
| SUBTOTAL | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
531 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 779 | MACHINE OPERATORS, NOT SPECIFIED | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
3,081 |
| SUBTOTAL | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
3,081 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 856 | INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
96 |
| SUBTOTAL | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
96 | |
| 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% |
631 |
| 223 | BIOLOGICAL TECHNICIANS | 97.3% |
0.0% |
0.0% |
0.0% |
2.7% |
736 |
| 453 | JANITORS AND CLEANERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
572 |
| 633 | SUPERVISORS, PRODUCTION OCCUPATIONS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
1,533 |
| 754 | PACKAGING AND FILLING MACHINE OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
76 |
| 756 | MIXING AND BLENDING MACHINE OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
902 |
| 757 | SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
1,250 |
| 779 | MACHINE OPERATORS, NOT SPECIFIED | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
453 |
| 785 | ASSEMBLERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
4,825 |
| 796 | PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
1,172 |
| 859 | MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
676 |
| SUBTOTAL | 90.0% |
0.0% |
9.7% |
0.0% |
0.1% |
12,826 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 777 | MISCELLANEOUS MACHINE OPERATORS, N.E.C. | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
73 |
| SUBTOTAL | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
73 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 235 | TECHNICIANS, N.E.C. | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
73 |
| 453 | JANITORS AND CLEANERS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
1,338 |
| 709 | GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
168 |
| 766 | FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD | 0.0% |
0.0% |
0.0% |
0.0% |
100.0% |
155 |
| 777 | MISCELLANEOUS MACHINE OPERATORS, N.E.C. | 66.7% |
0.0% |
0.0% |
0.0% |
33.3% |
464 |
| 804 | TRUCK DRIVERS, HEAVY | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
309 |
| 859 | MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS | 0.0% |
0.0% |
0.0% |
0.0% |
100.0% |
309 |
| SUBTOTAL | 27.9% |
0.0% |
50.1% |
0.0% |
21.9% |
2,816 | |
| 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% |
131 |
| 683 | ELECTRICAL AND ELECTRONIC EQUIPMENT ASSEMBLERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
20 |
| SUBTOTAL | 13.2% |
0.0% |
86.7% |
0.0% |
0.0% |
151 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 308 | COMPUTER OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
229 |
| 364 | TRAFFIC, SHIPPING, AND RECEIVING CLERKS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
248 |
| 453 | JANITORS AND CLEANERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
259 |
| 633 | SUPERVISORS, PRODUCTION OCCUPATIONS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
181 |
| 777 | MISCELLANEOUS MACHINE OPERATORS, N.E.C. | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
1,373 |
| 785 | ASSEMBLERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
43 |
| 856 | INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
32 |
| SUBTOTAL | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
2,365 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 074 | ATMOSPHERIC AND SPACE SCIENTISTS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
22 |
| 216 | ENGINEERING TECHNICIANS, N.E.C. | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
7 |
| 519 | MACHINERY MAINTENANCE OCCUPATIONS | 0.0% |
0.0% |
0.0% |
0.0% |
100.0% |
28 |
| 653 | SHEET METAL WORKERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
213 |
| 689 | INSPECTORS, TESTERS, AND GRADERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
14 |
| 713 | FORGING MACHINE OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
34 |
| 753 | CEMENTING AND GLUING MACHINE OPERATORS | 0.0% |
0.0% |
0.0% |
0.0% |
100.0% |
204 |
| 756 | MIXING AND BLENDING MACHINE OPERATORS | 0.0% |
0.0% |
0.0% |
0.0% |
100.0% |
136 |
| 785 | ASSEMBLERS | 0.0% |
0.0% |
0.0% |
0.0% |
100.0% |
134 |
| 787 | HAND MOLDING, CASTING, AND FORMING OCCUPATIONS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
54 |
| 889 | LABORERS, EXCEPT CONSTRUCTION | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
28 |
| SUBTOTAL | 42.5% |
0.0% |
0.0% |
0.0% |
57.4% |
874 | |
| 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% |
860 |
| 453 | JANITORS AND CLEANERS | 11.4% |
0.0% |
88.6% |
0.0% |
0.0% |
1,014 |
| 507 | BUS, TRUCK, AND STATIONARY ENGINE MECHANICS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
625 |
| 533 | MISCELLANEOUS ELECTRICAL AND ELECTRONIC EQUIPMENT REPAIRERS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
10 |
| 534 | HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
24 |
| 549 | NOT SPECIFIED MECHANICS AND REPAIRERS | 0.0% |
0.0% |
66.7% |
0.0% |
33.3% |
1,017 |
| 686 | BUTCHERS AND MEAT CUTTERS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
2,991 |
| 787 | HAND MOLDING, CASTING, AND FORMING OCCUPATIONS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
150 |
| 856 | INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
1,383 |
| 859 | MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS | 0.0% |
0.0% |
78.7% |
0.0% |
21.3% |
5,970 |
| 883 | FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C. | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
11,763 |
| 889 | LABORERS, EXCEPT CONSTRUCTION | 57.7% |
0.0% |
42.3% |
0.0% |
0.0% |
4,666 |
| SUBTOTAL | 19.0% |
0.0% |
75.6% |
0.0% |
5.2% |
30,473 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 465 | PUBLIC TRANSPORTATION ATTENDANTS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
4,366 |
| 508 | AIRCRAFT ENGINE MECHANICS | 0.0% |
0.0% |
100.0% |
0.0% |
0.0% |
7,276 |
| 637 | MACHINISTS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
3,317 |
| SUBTOTAL | 22.1% |
0.0% |
77.8% |
0.0% |
0.0% |
14,959 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 766 | FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD | 40.0% |
0.0% |
60.0% |
0.0% |
0.0% |
1,729 |
| SUBTOTAL | 40.0% |
0.0% |
60.0% |
0.0% |
0.0% |
1,729 | |
| 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% |
2,359 |
| 849 | CRANE AND TOWER OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
236 |
| SUBTOTAL | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
2,595 | |
| Code | Occupation Description (1980) | No Control |
Resp Prot |
Other PPE |
Vent |
Other Control |
Exposures |
| 275 | SALES COUNTER CLERKS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
185 |
| SUBTOTAL | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
185 | |
| 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% |
494 |
| SUBTOTAL | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
494 | |
| 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% |
2,561 |
| 083 | MEDICAL SCIENTISTS | 6.7% |
0.0% |
93.3% |
0.0% |
0.0% |
246 |
| 095 | REGISTERED NURSES | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
603 |
| 203 | CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
201 |
| 308 | COMPUTER OPERATORS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
107 |
| 379 | GENERAL OFFICE CLERKS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
39 |
| 443 | WAITERS'/WAITRESSES' ASSISTANTS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
1,239 |
| 444 | MISCELLANEOUS FOOD PREPARATION OCCUPATIONS | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
1,914 |
| 446 | HEALTH AIDES, EXCEPT NURSING | 100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
4,047 |
| SUBTOTAL | 97.9% |
0.0% |
2.0% |
0.0% |
0.0% |
10,957 | |
| TOTAL | 36.6% |
0.0% |
62.3% |
0.0% |
1.0% |
317,308 | |
| 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.