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HHE Report No. HETA-88-104-2207, ASARCO - Troy Unit Mine, Troy, Montana.

Authors
Cornwell-RJ; Knutti-EB
Source
NIOSH 1992 Apr:48 pages
NIOSHTIC No.
00208288
Abstract
In response to a request from the United Mine Workers of America, an investigation was made of possible exposures to diesel exhaust, silica (14808607) and noise at the ASARCO Troy Unit Mine (SIC-1044), Troy, Montana. This silver mine was also a significant copper producer. Approximately 314 persons were employed in two basic operations of mining and ore concentration. The ore was mined by the room and pillar method. Extraction calls for drilling, blasting, scaling and roof bolting, mucking and hauling. Exposures to nitrogen-dioxide (10102440) ranged from 0.16 to 4.61 parts per million (ppm) some of which were in excess of the recommended NIOSH limit of 1ppm. Coal-tar-pitch volatiles ranged in concentration from to 3.99mg/m3 with a mean concentration of 1.60mg/m3. Respirable dust concentrations ranged from 0.26 to 16.74mg/m3 with a mean of 2.24mg/m3. The mean quartz content of surface dust samples was 24% and of underground samples was 7%. Noise exposures ranged from 65.5 to 103.8 decibels-A for the 8 hour time weighted average samples. Of the 22 personal dosimeter readings obtained underground, 21 exceeded the limits as did six of the 19 readings taken on the surface. The authors conclude that a health hazard existed due to exposures to respirable silica, noise and diesel combustion products. The authors recommend specific measures to reduce the potential hazardous exposures and enhance the company's medical surveillance program.
Keywords
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-88-104-2207; Region-8; Hazard-Confirmed; Mining-industry; Underground-miners; Mineral-dusts; Airborne-dusts; Air-quality-monitoring; Noise-exposure; Occupational-exposure; Diesel-emissions;
CAS No.
14808-60-7; 10102-44-0;
Publication Date
19920401
Document Type
Hazard Evaluation and Technical Assistance;
Fiscal Year
1992
NTIS Accession No.
PB92-221415
NTIS Price
A04
Identifying No.
HETA-88-104-2207
NIOSH Division
DSHEFS;
SIC Code
1044;
Source Name
Respiratory Disease Hazard Evaluation and Technical Assistance Program, NIOSH, U.S. Department of Health and Human Services, Morgantown, West Virginia, Report No. HETA-88-104-2207, 48 pages, 38 references
State
MT; VA; WV;
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