NIOSH
HAZARD REVIEW
Health
Effects of Occupational Exposure
to
Respirable Crystalline Silica
|
Table
1. Nonmining and mining industries with the largest numbers of U.S.
workers potentially exposed to respirable crystalline silica, 1986
|
|||
|
SIC*
|
Industry |
Estimated
number of
workers potentially exposed (1986)† |
%
total
workers exposed (NOES) |
|
Nonmining
industries:
|
|||
|
174
|
Masonry, stonework, tile setting, and plastering |
131,986
|
32.7
|
|
734
|
Services to dwellings and other buildings |
65,812
|
10.3
|
|
327
|
Concrete, gypsum, and plaster products |
63,456
|
33.3
|
|
176
|
Roofing and sheet metal work |
51,153
|
25.3
|
|
356
|
General industrial machinery and equipment |
44,991
|
16.2
|
|
807
|
Medical and dental laboratories |
37,063
|
30.0
|
|
493
|
Combination of gas and electric and other utilities |
35,074
|
21.2
|
|
179
|
Miscellaneous special trade contractors |
32,615
|
7.8
|
|
753
|
Automotive repair shops |
30,826
|
7.1
|
|
326
|
Pottery and related products |
29,772
|
81.7
|
|
Mining
industries:
|
|||
|
13
|
Oil and gas extraction |
408,175
|
100‡
|
|
12
|
Bituminous coal and lignite mining |
174,131
|
100
|
|
14
|
Mining and quarrying of nonmetallic minerals, except fuels |
100,546
|
100
|
|
10
|
Metal mining |
39,856
|
100
|
| Source:
NIOSH [1991]. *Standard industrial classification. †Estimated number of workers potentially exposed to the hazards of flint, quartz, sand, or silica powder; based on data from the County Business Patterns 1986 [Bureau of the Census 1986] and the National Occupational Exposure Survey (NOES) [NIOSH 1983b]. For SICs in which the estimates differed for individual hazards, the highest percentage was used for that SIC. ‡Exposure is assumed to be 100% in the mining industries. |
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