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Vermiculite Ore Exposed

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Health Of Vermiculite Miners Exposed To Trace Amounts Of ...

Health Of Vermiculite Miners Exposed To Trace Amounts Of ...

A small cohort of 194 men with low exposure to fibrous tremolite (mean 0.75 f/ml y) in the mining and milling of vermiculite in South Carolina experienced 51 deaths 15 years or more from first employment. The SMR (all causes) was 1.17 reflecting excess deaths from circulatory disease. There were four deaths from lung cancer and 3.31 expected (SMR 1.21, 95% CI 0.33-3.09).

Health Of Vermiculite Miners Exposed To Trace Amounts Of ...

Health Of Vermiculite Miners Exposed To Trace Amounts Of ...

There were four deaths from lung cancer and 3.31 expected (SMR 1.21, 95% CI 0.33-3.09). Three of the four deaths were in the lowest exposure category (less than 1 f/ml y); no death was attributed to mesothelioma or pneumoconiosis. These findings contrast with those in Montana where the vermiculite ore was heavily contaminated with fibrous ...

How Vermiculite Is Made - Material, History, Used ...

How Vermiculite Is Made - Material, History, Used ...

None of the ore bodies currently used by major vermiculite producers pose an asbestos health risk to workers when the material is processed in accordance with the applicable MSDS. In August 2000, the United States Environmental Protection Agency (EPA) issued a report regarding vermiculite …

Vermiculite Northwest Fact Sheet, 2009 Update

Vermiculite Northwest Fact Sheet, 2009 Update

vermiculite ore from the 1940s until it closed in 1974. The ore used at the former Vermiculite Northwest facility was obtained from a mine in Libby, Montana, which was last owned and ... exposed to asbestos from vermiculite waste rock if it was used as fill material, for gardening, or …

Morbidity And Mortality Of Vermiculite Miners And Millers ...

Morbidity And Mortality Of Vermiculite Miners And Millers ...

@article{osti_6934800, title = {Morbidity and mortality of vermiculite miners and millers exposed to tremolite-actinolite: Part I. Exposure estimates}, author = {Amandus, H E and Wheeler, R and Jankovic, J and Tucker, J}, abstractNote = {The vermiculite ore and concentrate of a mine and mill near Libby, Montana, was found to be contaminated with fibrous tremolite-actinolite.

Vermiculite Ore Exposed - Masingita-Ps.Co.Za

Vermiculite Ore Exposed - Masingita-Ps.Co.Za

Workers Exposed to Vermiculite Ore Show Chest Wall Scarring Published June 2005. More than a quarter of workers tested at an Ohio vermiculite manufacturing plant ... Former Vermiculite …

Incidental Vermiculite Building Insulation Exposure ...

Incidental Vermiculite Building Insulation Exposure ...

Vermiculite insulation exposure levels in residential buildings: What are reasonable risk assessments for people exposed to vermiculite insulation in residential buildings. Most research on health hazards from asbestos-containing vermiculite insulation has focused on workers at vermiculite mining or processing sites or at communities close to those locations.

Grace Asks Judge To Shield Railway From Asbestos Suits ...

Grace Asks Judge To Shield Railway From Asbestos Suits ...

May 22, 2007 About 600 town residents and former railroad workers sued BNSF, claiming the railroad's transportation of vermiculite ore exposed them to asbestos, which is …

Public Health Assessment - Atsdr.Cdc.Gov

Public Health Assessment - Atsdr.Cdc.Gov

Mountain,” 7 miles northeast of Libby. From the early 1920s until 1990, vermiculite was mined for use in a variety of products. Raw vermiculite ore is used in gypsum wallboard, cinder blocks, and many other products, and exfoliated vermiculite is used as loose fill insulation, as a fertilizer carrier, and as an aggregate for concrete.

Vermiculite Northwest Fact Sheet, 2009 Update

Vermiculite Northwest Fact Sheet, 2009 Update

vermiculite ore from the 1940s until it closed in 1974. The ore used at the former Vermiculite Northwest facility was obtained from a mine in Libby, Montana, which was last owned and ... exposed to asbestos from vermiculite waste rock if it was used as fill material, for gardening, or …

Exposure To Asbestos-Containing Vermiculite Ore And ...

Exposure To Asbestos-Containing Vermiculite Ore And ...

It is estimated that between 1924 and 1990, when the mine was closed, a total of 5.8 million tons of vermiculite ore was mined and distributed (Kuntz et al. 2009), making Zonolite Mountain the largest vermiculite ore mine in the United States. In addition to the mine, processing, exfoliation, and shipping preparations were performed in Libby.

(Pdf) Mortality Of Vermiculite Miners Exposed To Tremolite

(Pdf) Mortality Of Vermiculite Miners Exposed To Tremolite

The vermiculite ore as fed to the mill contained 4-6% of amphibole fibre in the tremolite series. Vital status was established in all but one of the 406 and death certificates were obtained and ...

Vermiculite Intermountain Hc-02-27-2007Release

Vermiculite Intermountain Hc-02-27-2007Release

communities throughout the United States located near facilities that received vermiculite ore from the Libby mine. A major source of exposure to asbestos is from exfoliation of the ore at exfoliation facilities. Exfoliation is the process of heating the vermiculite ore to drive off excess 3

Exposure To Asbestos-Containing Vermiculite Ore And ...

Exposure To Asbestos-Containing Vermiculite Ore And ...

Mar 12, 2010 It is estimated that between 1924 and 1990, when the mine was closed, a total of 5.8 million tons of vermiculite ore was mined and distributed (Kuntz et al. 2009), making Zonolite Mountain the largest vermiculite ore mine in the United States. In addition to the mine, processing, exfoliation, and shipping preparations were performed in Libby.

Workers Exposed To Libby Vermiculite Ore Have High Rate …

Workers Exposed To Libby Vermiculite Ore Have High Rate …

Workers Exposed To Libby Vermiculite Ore Have High Rate Of Chest Wall Abnormalities. SAN DIEGO -- More than one-quarter of tested workers at an Ohio manufacturing plant historically exposed to asbestos-containing vermiculite ore exhibited signs of scarring of the chest wall lining, a study by researchers from the University of Cincinnati has found.

Vermiculite Health, Safety And Environmental Aspects

Vermiculite Health, Safety And Environmental Aspects

Vermiculite is a member of the phyllosilicate mineral group and is micaceous in nature. It is found in many parts of the world but only a limited number of sources are worked as commercial deposits. The vermiculite is mined and refined using a variety of techniques and supplied commercially in a range of particle size grades of vermiculite concentrate (unexpanded).

Vermiculite Health, Safety And Environmental Aspects

Vermiculite Health, Safety And Environmental Aspects

Vermiculite and other ore bodies can contain a variety of associated minerals such as mica, quartz, feldspar, etc. The associated minerals are unique to a particular deposit and, in ... Vermiculite Miners and Millers Exposed to Tremolite-Actinolite: Part I, Exposure Estimates” Am. J. Ind, Hyg. 11,1-14,1987. Amandus, H.E., and Wheeler, R ...

Disease Progression In Persons Exposed To Asbestos ...

Disease Progression In Persons Exposed To Asbestos ...

Disease Progression in Persons Exposed to Asbestos Contaminated Vermiculite Ore in Marysville, Ohio (R01): CDC's Procurement and Grants Office has published a funding opportunity announcement entitled, Disease Progression in Persons Exposed to Asbestos Contaminated Vermiculite Ore in Marysville, Ohio (R01). Approximately $500,000 will be available in fiscal year 2009 to fund one award.

Researchers To Assess Effects Of Town's Vermiculite Ore ...

Researchers To Assess Effects Of Town's Vermiculite Ore ...

Nov 05, 2009 According to researchers at Mount Sinai School of Medicine, thousands of residents and workers in Libby, Mont., have been exposed to asbestos-contaminated vermiculite ore, …

Health Consultation Zonolite/W.R. Grace Site

Health Consultation Zonolite/W.R. Grace Site

tons of vermiculite ore, it was identified as a potential problem by the ATSDR following a national evaluation of facilities that received vermiculite ore from the Libby, Montana mine. Site Visit On November 19, 2002, James Pasqualo, Jeffrey Winegar, Stella Tsai, and Mary Baird of the NJDHSS conducted a site visit at the Zonolite/W.R. Grace site.

Libby Amphibole Asbestos – Not Just A Libby Risk - Card In ...

Libby Amphibole Asbestos – Not Just A Libby Risk - Card In ...

Members of these communities may have been exposed to asbestos-contaminated vermiculite ore through multiple pathways during operation, and residual fiber contamination continues to present a potential for hazardous exposure. The Agency for Toxic Substance and Disease Registry (ATSDR) is currently evaluating 28 of these processing sites.

Journal Article: Low Levels Of Exposure To Libby Amphibole ...

Journal Article: Low Levels Of Exposure To Libby Amphibole ...

Nov 05, 2014 Libby Amphibole asbestos (LAA) is a mixture of amphibole fibers present in ore from the vermiculite mine near Libby, MT (1). Workers and community residents were exposed to LAA at the mining operations in Libby, MT (2, 3), as well as at vermiculite processing facilities in Marysville, OH (4, 5), and Minneapolis, MN (6). Epidemiologic studies of these populations indicate that exposure to LAA ...

Radiographic Evidence Of Nonoccupational Asbestos …

Radiographic Evidence Of Nonoccupational Asbestos …

Jan 01, 2012 BACKGROUND: Community exposure to asbestos from contaminated vermiculite ore from Libby, Montana, occurred in many processing sites in the United States, including a densely populated urban residential neighborhood of Minneapolis, Minnesota.