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 METHANE, CHLORODIFLUORO-
CAS # 75-45-6
RTECS # PA6390000 
Agent Code 80048

SPECIAL TRADE CONTRACTORS (SIC 17)
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%
3,717
516 HEAVY EQUIPMENT MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
5,733
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 95.2%
0.0%
0.0%
0.0%
4.8%
33,556
549 NOT SPECIFIED MECHANICS AND REPAIRERS 60.7%
0.0%
0.0%
39.3%
0.0%
4,305
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 100.0%
0.0%
0.0%
0.0%
0.0%
16,198
596 SHEETMETAL DUCT INSTALLERS 100.0%
0.0%
0.0%
0.0%
0.0%
2,466
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
297
653 SHEET METAL WORKERS 100.0%
0.0%
0.0%
0.0%
0.0%
1,300
869 CONSTRUCTION LABORERS 81.9%
0.0%
0.0%
0.0%
18.1%
17,471
SUBTOTAL 92.3%
0.0%
0.0%
1.9%
5.6%
85,043
FOOD AND KINDRED PRODUCTS (SIC 20)
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%
232
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
2,350
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 90.6%
0.0%
9.4%
0.0%
0.0%
3,895
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
53
687 BAKERS 0.0%
0.0%
66.7%
33.3%
0.0%
5,650
756 MIXING AND BLENDING MACHINE OPERATORS 0.0%
0.0%
0.0%
50.0%
50.0%
313
883 FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
52
SUBTOTAL 49.5%
0.0%
32.9%
16.2%
1.2%
12,545
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%
334
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
221
783 WELDERS AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
26
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
79
873 PRODUCTION HELPERS 100.0%
0.0%
0.0%
0.0%
0.0%
206
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
866
APPAREL AND OTHER TEXTILE PRODUCTS (SIC 23)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
518 INDUSTRIAL MACHINERY REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
37
744 TEXTILE SEWING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
2,421
769 SLICING AND CUTTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
277
888 HAND PACKERS AND PACKAGERS 100.0%
0.0%
0.0%
0.0%
0.0%
1,176
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
3,911
LUMBER AND WOOD PRODUCTS (SIC 24)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
36
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
36
FURNITURE AND FIXTURES (SIC 25)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
518 INDUSTRIAL MACHINERY REPAIRERS 0.0%
0.0%
100.0%
0.0%
0.0%
732
SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
732
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
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%
123
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
186
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
263
637 MACHINISTS 0.0%
0.0%
100.0%
0.0%
0.0%
278
684 MISCELLANEOUS PRECISION WORKERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
334
696 STATIONARY ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
62
699 MISCELLANEOUS PLANT AND SYSTEM OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
26
766 FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD 100.0%
0.0%
0.0%
0.0%
0.0%
129
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
0.0%
0.0%
0.0%
0.0%
547
783 WELDERS AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
245
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
938
859 MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
313
SUBTOTAL 91.9%
0.0%
8.0%
0.0%
0.0%
3,444
PETROLEUM AND COAL PRODUCTS (SIC 29)
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%
105
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
105
STONE, CLAY, AND GLASS PRODUCTS (SIC 32)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
575 ELECTRICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
246
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
246
PRIMARY METAL INDUSTRIES (SIC 33)
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%
92
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 59.6%
0.0%
20.2%
0.0%
20.2%
326
SUBTOTAL 68.4%
0.0%
15.7%
0.0%
15.7%
418
FABRICATED METAL PRODUCTS (SIC 34)
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%
284
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
16
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 100.0%
0.0%
0.0%
0.0%
0.0%
104
798 PRODUCTION SAMPLERS AND WEIGHERS 100.0%
0.0%
0.0%
0.0%
0.0%
142
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
546
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
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%
96
216 ENGINEERING TECHNICIANS, N.E.C. 0.0%
0.0%
0.0%
0.0%
100.0%
169
364 TRAFFIC, SHIPPING, AND RECEIVING CLERKS 100.0%
0.0%
0.0%
0.0%
0.0%
1,274
453 JANITORS AND CLEANERS 86.9%
0.0%
0.0%
13.1%
0.0%
4,059
518 INDUSTRIAL MACHINERY REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
625
567 CARPENTERS 100.0%
0.0%
0.0%
0.0%
0.0%
123
575 ELECTRICIANS 53.3%
0.0%
46.7%
0.0%
0.0%
386
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 100.0%
0.0%
0.0%
0.0%
0.0%
58
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
65
779 MACHINE OPERATORS, NOT SPECIFIED 2.2%
0.0%
0.0%
97.8%
0.0%
15,569
785 ASSEMBLERS 97.9%
0.0%
0.0%
0.0%
2.1%
5,449
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 28.1%
0.0%
30.8%
0.0%
41.1%
977
856 INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
32
SUBTOTAL 41.4%
0.0%
1.6%
54.5%
2.3%
28,882
ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
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%
24
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
276
518 INDUSTRIAL MACHINERY REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
112
533 MISCELLANEOUS ELECTRICAL AND ELECTRONIC EQUIPMENT REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
19
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 80.9%
0.0%
0.0%
0.0%
19.1%
31
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 100.0%
0.0%
0.0%
0.0%
0.0%
3
645 PATTERNMAKERS AND MODEL MAKERS, METAL 0.0%
0.0%
100.0%
0.0%
0.0%
139
696 STATIONARY ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
66
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
35
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
41
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 0.0%
0.0%
100.0%
0.0%
0.0%
495
859 MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
59
SUBTOTAL 48.9%
0.0%
50.6%
0.0%
0.4%
1,300
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%
67
224 CHEMICAL TECHNICIANS 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%
142
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
1,528
505 AUTOMOBILE MECHANICS 0.0%
0.0%
100.0%
0.0%
0.0%
45
515 AIRCRAFT MECHANICS, EXC. ENGINE 100.0%
0.0%
0.0%
0.0%
0.0%
44
519 MACHINERY MAINTENANCE OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
22
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
77
575 ELECTRICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
65
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 100.0%
0.0%
0.0%
0.0%
0.0%
115
637 MACHINISTS 0.0%
0.0%
0.0%
100.0%
0.0%
176
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
51
769 SLICING AND CUTTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
131
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
21
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 100.0%
0.0%
0.0%
0.0%
0.0%
38
859 MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
687
SUBTOTAL 93.1%
0.0%
1.4%
5.4%
0.0%
3,212
INSTRUMENTS AND RELATED PRODUCTS (SIC 38)
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%
14
453 JANITORS AND CLEANERS 0.0%
0.0%
0.0%
0.0%
100.0%
251
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
18
567 CARPENTERS 100.0%
0.0%
0.0%
0.0%
0.0%
139
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 100.0%
0.0%
0.0%
0.0%
0.0%
55
696 STATIONARY ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
45
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
243
SUBTOTAL 67.1%
0.0%
0.0%
0.0%
32.8%
765
LOCAL AND INTERURBAN PASSENGER TRANSIT (SIC 41)
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%
4,763
503 SUPERVISORS, MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
217
507 BUS, TRUCK, AND STATIONARY ENGINE MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
516
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
5,496
TRUCKING AND WAREHOUSING (SIC 42)
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%
638
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 96.5%
0.0%
3.5%
0.0%
0.0%
339
SUBTOTAL 98.7%
0.0%
1.2%
0.0%
0.0%
977
TRANSPORTATION BY AIR (SIC 45)
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%
0.0%
100.0%
945
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
770
515 AIRCRAFT MECHANICS, EXC. ENGINE 83.2%
0.0%
0.0%
16.8%
0.0%
143
653 SHEET METAL WORKERS 100.0%
0.0%
0.0%
0.0%
0.0%
1,727
689 INSPECTORS, TESTERS, AND GRADERS 100.0%
0.0%
0.0%
0.0%
0.0%
193
SUBTOTAL 74.3%
0.0%
0.0%
0.6%
25.0%
3,778
COMMUNICATION (SIC 48)
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%
1,509
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
1,509
ELECTRIC, GAS, AND SANITARY SERVICES (SIC 49)
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%
70
575 ELECTRICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
700
577 ELECTRICAL POWER INSTALLERS AND REPAIRERS 0.0%
0.0%
75.0%
25.0%
0.0%
3,734
SUBTOTAL 17.0%
0.0%
62.1%
20.7%
0.0%
4,504
WHOLESALE TRADE - NONDURABLE GOODS (SIC 51)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
549 NOT SPECIFIED MECHANICS AND REPAIRERS 33.3%
0.0%
0.0%
0.0%
66.7%
4,000
SUBTOTAL 33.3%
0.0%
0.0%
0.0%
66.7%
4,000
BUSINESS SERVICES (SIC 73)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
073 CHEMISTS, EXCEPT BIOCHEMISTS 33.3%
0.0%
66.7%
0.0%
0.0%
1,441
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
140
696 STATIONARY ENGINEERS 0.0%
0.0%
0.0%
0.0%
100.0%
22
SUBTOTAL 38.6%
0.0%
59.9%
0.0%
1.3%
1,603
AUTO REPAIR, SERVICES, AND GARAGES (SIC 75)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
549 NOT SPECIFIED MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
2,508
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
2,508
MISCELLANEOUS REPAIR SERVICES (SIC 76)
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%
248
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
3,959
549 NOT SPECIFIED MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
1,985
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
133
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
6,325
HEALTH SERVICES (SIC 80)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
083 MEDICAL SCIENTISTS 100.0%
0.0%
0.0%
0.0%
0.0%
57
203 CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS 73.4%
0.0%
0.0%
0.0%
26.6%
62
446 HEALTH AIDES, EXCEPT NURSING 100.0%
0.0%
0.0%
0.0%
0.0%
300
449 MAIDS AND HOUSEMEN 100.0%
0.0%
0.0%
0.0%
0.0%
1,561
453 JANITORS AND CLEANERS 67.1%
0.0%
32.9%
0.0%
0.0%
2,093
518 INDUSTRIAL MACHINERY REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
208
526 HOUSEHOLD APPLIANCE AND POWER TOOL REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
20
534 HEATING, AIR CONDITIONING, AND REFRIGERATION MECHANICS 65.7%
0.0%
20.5%
0.0%
13.8%
500
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
29
549 NOT SPECIFIED MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
480
567 CARPENTERS 100.0%
0.0%
0.0%
0.0%
0.0%
14
575 ELECTRICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
95
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 52.6%
0.0%
47.4%
0.0%
0.0%
221
SUBTOTAL 82.6%
0.0%
15.8%
0.0%
1.5%
5,640
TOTAL 76.8%
0.0%
6.2%
11.5%
5.4%
178,391
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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