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

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  • 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 onequarter of tested workers at an Ohio manufacturing plant historically exposed to asbestoscontaining vermiculite ore exhibited signs of scarring of the chest wall lining, a study by researchers from the University of Cincinnati has found.

  • Limiting Potential Exposures of Workers to Asbestos

    Limiting Potential Exposures of Workers to Asbestos

    Vermiculite ore mined near Libby, Montana, which accounted for more than half the worldwide production of vermiculite from 1925 to 1990, was contaminated with asbestos and asbestoslike fibers. Workplace exposure to these fibers caused a serious health problem in local miners and millers, as well as some downstream workers.

  • Libby Asbestos Exposure Goes Well Beyond Just Libby

    Libby Asbestos Exposure Goes Well Beyond Just Libby

    The plant utilized vermiculite ore from Libby for much of those 50 to 60 years, meaning many of the plants workers and nearby residents were at risk. Approximately 6,000 people who worked at or lived near the plant during that time were included in a recent

  • A risk assessment for exposure to grunerite asbestos

    A risk assessment for exposure to grunerite asbestos

    The vermiculite workers are an example of the effect of amphibole asbestos at concentrations of 1 in the ore. The mortality experience of the two asbestosexposed groups are distinctly similar. Each shows an elevated risk of lung cancer, mesothelioma, and asbestosis a nonmalignant respiratory disease.

  •  PDF  Exposure to Asbestos Containing Vermiculite Ore and

    PDF Exposure to Asbestos Containing Vermiculite Ore and

    Libby, Montana, was home to the largest vermiculite ore mine in the United States. The processing, use, and transport of the ore, which was contaminated with amphibole asbestos, led to generalized ...

  • Vermiculite ore

    Vermiculite ore

    The Vermiculite ore from the Kovdor origin is well known throughout the world as the highest quality raw material for exfoliated vermiculite production and vermiculite products boards, plasters and others. The Kovdor deposit has all grades of vermiculite Large, Medium, Fine, SuperFine, Micron. ...

  • 5 Things You Need to Know About Vermiculite   Family

    5 Things You Need to Know About Vermiculite Family

    Jun 17, 2019018332What is vermiculite Vermiculite is a mineral that was used for insulation. If your home was built before 1990, you might have vermiculite insulation in your walls or attic. Up to 85 percent of all vermiculite insulation in the U.S. came from a mine in Libby, Montana, sold under the name Zonolite.

  • Asbestos in Vermiculite Insulation   Wisconsin Department

    Asbestos in Vermiculite Insulation Wisconsin Department

    Sep 29, 2020018332Over 70 of vermiculite ore mined worldwide came from the Libby, Montana mine. The ore from this mine also included a natural deposit of amphiboletremolite asbestos. Much of the vermiculite from Libby was contaminated with asbestos. Asbestos fibers are invisible to the eye and can only be professionally detected.

  • VERMICULITE IS NOT ASBESTOS

    VERMICULITE IS NOT ASBESTOS

    Vermiculite ore deposits, like most other rocks, contain an assemblage of other minerals besides the vermiculite Addison and Davies 1990. There may be major components such as feldspars, pyroxenes, amphiboles, carbonates, and quartz, as well as minor components such as phosphates, iron oxides, titanium oxides and zircon Atkinson et al 1982.

  • What Is Asbestos    Types of Asbestos  amp  Health Risks

    What Is Asbestos Types of Asbestos amp Health Risks

    Jul 10, 2020018332Those exposed risk illnesses such as mesothelioma and other asbestos cancers. By the late 1970s, miners practiced a new method for removing ore. Miners incorporated wetting agents into the process. Wetting the ore helped prevent the release of fibers. Workers then crushed, sized, screened and dewatered the ore prior to shipment.

  • Significance of Exposed Grain Surface Area in Coarse

    Significance of Exposed Grain Surface Area in Coarse

    Gold Ore with the HydroFloat ... Vermiculite Graphite Coal ... HRXMT used to compare exposed grain surface area needed to recover 0.85x0.50 mm particles

  • Workers exposed to Libby Vermiculite Ore have high rate of

    Workers exposed to Libby Vermiculite Ore have high rate of

    More than onequarter of tested workers at an Ohio manufacturing plant historically exposed to asbestoscontaining vermiculite ore exhibited signs of scarring of the chest wall lining, or pleural ...

  • Vermiculite Northwest  Spokane  Health Consultation  2004

    Vermiculite Northwest Spokane Health Consultation 2004

    The exfoliation, or popping, of vermiculite ore at Vermiculite NW released significant amounts of asbestos fibers inside the facility and vented contaminated asbestos dust outside that may have been carried into the nearby neighborhood. Onsite soil samples revealed detectable levels of asbestos, and offsite samples showed trace levels of ...

  • Asbestos Toxicity  Where Is Asbestos Found    ATSDR

    Asbestos Toxicity Where Is Asbestos Found ATSDR

    Jan 29, 2014018332The mined vermiculite ore contained amphibole asbestos. It was processed at 245 sites around the country, and contaminated vermiculite products were distributed nationally ATSDR 2001a. See below for a map with a sample of 30 out of the 245 sites where Libby vermiculite

  • US  Vermiculite Products Could Expose Consumers to

    US Vermiculite Products Could Expose Consumers to

    The company has been sued by nearly 200 former workers or their families, and is now the subject of a class action lawsuit representing some 26,000 people exposed to asbestos from contaminated vermiculite ore, including mineworkers, processing plant employees and Libby residents.

  • Radiographic evidence of nonoccupational asbestos

    Radiographic evidence of nonoccupational asbestos

    N2 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.

  • CDC   NIOSH Update   NIOSH Recommends Precautions to

    CDC NIOSH Update NIOSH Recommends Precautions to

    People may be occupationally exposed to vermiculite in workrelated activities involving insulation and other construction or home materials, agricultural and horticultural materials such as potting mixes and soil conditioners, brake shoes and pads, and other products. ... show that vermiculite ore mined near Libby until 1990 was contaminated ...

  • Workers exposed to Libby Vermiculite Ore have high rate of

    Workers exposed to Libby Vermiculite Ore have high rate of

    More than onequarter of tested workers at an Ohio manufacturing plant historically exposed to asbestoscontaining vermiculite ore exhibited signs of scarring of the chest wall lining, or pleural ...

  • Golden Vermiculite Ore     VISIGHT

    Golden Vermiculite Ore VISIGHT

    Vermiculite ore process heatresistant, inert, inorganic, lightweight and absorbent, making it an excellent loose fill insulation that protects against heat, sound and moisture. Exfoliated vermiculite is used in both hand and sprayapplied general building plasters to improve coverage, ease of handling, adhesion to a wide variety of substrates ...

  • Asbestos Mines   Vermiculite Mining  amp  Asbestos Exposure

    Asbestos Mines Vermiculite Mining amp Asbestos Exposure

    Jan 20, 2020018332U.S. asbestos mining peaked around 1973, a few years before the federal government issued warnings about the mineral and began to regulate its use. Unfortunately for most of the miners, many were already exposed, and the restrictions came much too late. Asbestos mining in the U.S. began just before the turn of the 20th century.

  • Asbestos Awareness Lesson Plan  Libby Montana

    Asbestos Awareness Lesson Plan Libby Montana

    an ore called quotvermiculitequot exposed workers, their families, and thousands of town residents to a toxic form of asbestos, creating what the Environmental Protection Agency EPA has called the worst case of industrial poisoning of a whole community in American history. 2. Play the video clip, Working at the Mine length 1212 and ask

  • Low Exposure To Asbestos like Mineral From Montana

    Low Exposure To Asbestos like Mineral From Montana

    Vermiculite is a mineral with a flaky, fluffylooking structure. Previous studies revealed that the vermiculite ore mined in Libby, Mont., contained increased levels of an asbestoslike mineral ...

  • Journal Article  Low Levels Of Exposure To Libby Amphibole

    Journal Article Low Levels Of Exposure To Libby Amphibole

    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 ...

  • Protect Your Family from Asbestos Contaminated Vermiculite

    Protect Your Family from Asbestos Contaminated Vermiculite

    Sizes of vermiculite products range from very fine particles to large coarse pieces nearly an inch long. Top of Page. Concerns about Asbestoscontaminated Vermiculite Insulation. A mine near Libby, Montana, was the source of over 70 percent of all vermiculite sold in

  • Health Canada Vermiculite Insulation Containing Asbestos

    Health Canada Vermiculite Insulation Containing Asbestos

    vermiculite ore produced by the Libby Mine in Montana from the 1920s to 1990. It was sold as Zonolite174 Attic Insulation and possibly other brands in Canada during that time. Vermiculite from the Libby Mine may contain asbestos. The Libby Mine supplied the majority of the world market in vermiculitebased insulation.

  • Miners and Asbestos Exposure   Tremolite Asbestos in

    Miners and Asbestos Exposure Tremolite Asbestos in

    Tremolite asbestos is a contaminant of vermiculitean ore resembling mica that is used in housing insulation Zonolite, soil conditioners, fertilizers, cement mixtures and as an ingredient in animal feed Verxite. From 1924 to 1990, Zonolite Mountain in Libby, Montana, was the site of a vermiculite

  •  PDF  Mortality in a cohort of vermiculite miners exposed

    PDF Mortality in a cohort of vermiculite miners exposed

    Prior to the early 1990s, between 50 to 80 of the worlds supply of vermiculite ore was mined near Libby, Montana, where sodiccalcic elongate amphiboles 1 were a common mineral impurity ATSDR ...

  • Health Officials Still Accounting for Asbestos Mined in

    Health Officials Still Accounting for Asbestos Mined in

    The Centers for Disease Control concluded in a report last week that 28 plants across the nation that processed large amounts of vermiculite ore. from Libby exposed workers, families and some ...

  • Former Vermiculite Northwest Portland  Oregon

    Former Vermiculite Northwest Portland Oregon

    with asbestos from vermiculite ore that was received from Libby, Montana and processed at the former Vermiculite Northwest facility in Portland, Oregon. The evaluation focused on ways that people could have been or may be exposed to asbestos from vermiculite processed at this site from 1967 until it

  • 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 onequarter of tested workers at an Ohio manufacturing plant historically exposed to asbestoscontaining vermiculite ore exhibited signs of scarring of the chest wall lining, a study by researchers from the University of Cincinnati has found.

  • Exposure to Asbestos Containing Vermiculite Ore and

    Exposure to Asbestos Containing Vermiculite Ore and

    Jul 01, 2010018332Mortality in a cohort of vermiculite miners exposed to fibrous amphibole in Libby, Montana. Occup Environ Med 614363366 15031396. Crossref, Medline, Google Scholar McDonald JC, Sebastien P, Armstrong B. 1986. Radiological survey of past and present vermiculite miners exposed to tremolite. Br J Ind Med 437445449 3013279. Medline, Google ...

  • Radiographic Evidence of Nonoccupational Asbestos

    Radiographic Evidence of Nonoccupational Asbestos

    Vermiculite ore from a mine near Libby, Montana, is known to be contaminated with amphibole asbestos primarily winchite, richterite, and tremolite, which is liberated in the mining and processing of the ore Agency for Toxic Substances and Disease Registry ATSDR 2008 Meeker et al. 2003. The mining and processing of vermiculite in Libby

  • Vermiculite Q amp A

    Vermiculite Q amp A

    W.R. Grace bought the vermiculite mine in Libby in 1963 from the Zonolite Company. More than 1.5 billion pounds of raw contaminated ore was sent to processing plants across Canada. From a third to a half of the vermiculite from this mine was sold as attic insulation from the 1940s until 1984, when its sale by the company was discontinued.