ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)107788
CIS number 08-375
ISSN - Serial title 1545-9624 - Journal of Occupational and Environmental Hygiene
Year 2006
Convention or series no.
Author(s) Hicks J., Yager J.
Title Airborne crystalline silica concentrations at coal-fired power plants associated with coal fly ash
Bibliographic information Aug. 2006, Vol.3, No.8, p.448-455. 19 ref.
Abstract This study presents the results of the measurements of airborne concentrations of crystalline silica dust in the breathing zone of workers exposed to fly ash. Six plants were studied; two were fired with lignite, and the other four used bituminous and sub-bituminous coals. A total of 108 personal breathing zone respirable dust air samples were collected. The results from bituminous and sub-bituminous fired plants revealed that the highest airborne fly ash concentrations are encountered during maintenance activities: 0.008mg/m3 to 96mg/m3 (mean of 1.8mg/m3). This group exceeded the threshold limit values (TLV) in 60% of the air samples. During normal production activities, airborne concentrations of crystalline silica ranged from non-detectable to 0.18mg/m3 (mean value of 0.048mg/m3). Other findings concerning the particle sizes and the crystalline forms of silica are discussed.
Descriptors (primary) flyash; lignite; bituminous coal; determination in air; electric power generation; thermal power stations; silica
Descriptors (secondary) threshold limit values; personal sampling; breathing atmosphere; maintenance; exposure evaluation; respirable dust
Document type D - Periodical articles
Country / State or ProvinceUSA
Subject(s) Power generation and distribution
Toxic and dangerous substances
Broad subject area(s) Chemical safety
Browse category(ies) Power generation and distribution