PittsburghV1, Main, Exploration, bibRecord, 000638

Airborne asbestos exposures associated with gasket and packing replacement: a simulation study of flange and valve repair work and an assessment of exposure variables.

Identifieur interne : 000638 ( Main/Exploration ); précédent : 000637; suivant : 000639

Airborne asbestos exposures associated with gasket and packing replacement: a simulation study of flange and valve repair work and an assessment of exposure variables.

Auteurs : Amy K. Madl [États-Unis] ; Kathryn D. Devlin [États-Unis] ; Angela L. Perez [États-Unis] ; Dana M. Hollins [États-Unis] ; Dallas M. Cowan [États-Unis] ; Paul K. Scott [États-Unis] ; Katherine White [États-Unis] ; Thales J. Cheng [États-Unis] ; John L. Henshaw [États-Unis]

Source :

Regulatory toxicology and pharmacology : RTP [ 1096-0295 ] ; 2015.

RBID : pubmed:25445297

Descripteurs français

KwdFr :
- Amiante (analyse), Exposition par inhalation (analyse), Exposition professionnelle (analyse), Humains, Navires, Polluants atmosphériques d'origine professionnelle (analyse), Surveillance de l'environnement, Ventilation.
MESH :
- analyse : Amiante, Exposition par inhalation, Exposition professionnelle, Polluants atmosphériques d'origine professionnelle.
- Humains, Navires, Surveillance de l'environnement, Ventilation.

English descriptors

KwdEn :
- Air Pollutants, Occupational (analysis), Asbestos (analysis), Environmental Monitoring, Humans, Inhalation Exposure (analysis), Occupational Exposure (analysis), Ships, Ventilation.
MESH :
- chemical , analysis : Air Pollutants, Occupational, Asbestos.
- analysis : Inhalation Exposure, Occupational Exposure.
- Environmental Monitoring, Humans, Ships, Ventilation.

Abstract

A simulation study was conducted to evaluate worker and area exposure to airborne asbestos associated with the replacement of asbestos-containing gaskets and packing materials from flanges and valves and assess the influence of several variables previously not investigated. Additionally, potential of take home exposures from clothing worn during the study was characterized. Our data showed that product type, ventilation type, gasket location, flange or bonnet size, number of flanges involved, surface characteristics, gasket surface adherence, and even activity type did not have a significant effect on worker exposures. Average worker asbestos exposures during flange gasket work (PCME=0.166 f/cc, 12-59 min) were similar to average worker asbestos exposures during valve overhaul work (PCME=0.165 f/cc, 7-76 min). Average 8-h TWA asbestos exposures were estimated to range from 0.010 to 0.062 f/cc. Handling clothes worn during gasket and packing replacement activities demonstrated exposures that were 0.71% (0.0009 f/cc 40-h TWA) of the airborne asbestos concentration experienced during the 5 days of the study. Despite the many variables considered in this study, exposures during gasket and packing replacement occur within a relatively narrow range, are below current and historical occupational exposure limits for asbestos, and are consistent with previously published data.

DOI: 10.1016/j.yrtph.2014.10.017
PubMed: 25445297

Affiliations:

Le document en format XML

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<term>Polluants atmosphériques d'origine professionnelle (analyse)</term>
<term>Surveillance de l'environnement</term>
<term>Ventilation</term>
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<term>Exposition par inhalation</term>
<term>Exposition professionnelle</term>
<term>Polluants atmosphériques d'origine professionnelle</term>
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<term>Ships</term>
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<front><div type="abstract" xml:lang="en">A simulation study was conducted to evaluate worker and area exposure to airborne asbestos associated with the replacement of asbestos-containing gaskets and packing materials from flanges and valves and assess the influence of several variables previously not investigated. Additionally, potential of take home exposures from clothing worn during the study was characterized. Our data showed that product type, ventilation type, gasket location, flange or bonnet size, number of flanges involved, surface characteristics, gasket surface adherence, and even activity type did not have a significant effect on worker exposures. Average worker asbestos exposures during flange gasket work (PCME=0.166 f/cc, 12-59 min) were similar to average worker asbestos exposures during valve overhaul work (PCME=0.165 f/cc, 7-76 min). Average 8-h TWA asbestos exposures were estimated to range from 0.010 to 0.062 f/cc. Handling clothes worn during gasket and packing replacement activities demonstrated exposures that were 0.71% (0.0009 f/cc 40-h TWA) of the airborne asbestos concentration experienced during the 5 days of the study. Despite the many variables considered in this study, exposures during gasket and packing replacement occur within a relatively narrow range, are below current and historical occupational exposure limits for asbestos, and are consistent with previously published data.</div>
</front>
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<tree><country name="États-Unis"><region name="Californie"><name sortKey="Madl, Amy K" sort="Madl, Amy K" uniqKey="Madl A" first="Amy K" last="Madl">Amy K. Madl</name>
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<name sortKey="Cheng, Thales J" sort="Cheng, Thales J" uniqKey="Cheng T" first="Thales J" last="Cheng">Thales J. Cheng</name>
<name sortKey="Cowan, Dallas M" sort="Cowan, Dallas M" uniqKey="Cowan D" first="Dallas M" last="Cowan">Dallas M. Cowan</name>
<name sortKey="Devlin, Kathryn D" sort="Devlin, Kathryn D" uniqKey="Devlin K" first="Kathryn D" last="Devlin">Kathryn D. Devlin</name>
<name sortKey="Henshaw, John L" sort="Henshaw, John L" uniqKey="Henshaw J" first="John L" last="Henshaw">John L. Henshaw</name>
<name sortKey="Hollins, Dana M" sort="Hollins, Dana M" uniqKey="Hollins D" first="Dana M" last="Hollins">Dana M. Hollins</name>
<name sortKey="Perez, Angela L" sort="Perez, Angela L" uniqKey="Perez A" first="Angela L" last="Perez">Angela L. Perez</name>
<name sortKey="Scott, Paul K" sort="Scott, Paul K" uniqKey="Scott P" first="Paul K" last="Scott">Paul K. Scott</name>
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Airborne asbestos exposures associated with gasket and packing replacement: a simulation study of flange and valve repair work and an assessment of exposure variables.

Airborne asbestos exposures associated with gasket and packing replacement: a simulation study of flange and valve repair work and an assessment of exposure variables.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

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