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The vermiculite ore formerly mined in Libby, Montana, contains asbestiform amphibole fibers of winchite, richterite, and tremolite asbestos. Because of the public health impact of widespread occupational and nonoccupational exposure to amphiboles in Libby vermiculite, numerous related studies have been published in recent years.
A significant source of exposure to asbestos in the came from contaminated vermiculite ore mined in rural Libby, Montana and then distributed to over 200 regional processing and expanding plants in 30 states; shipments of material were sent to nearly every state in the
Plant Workers Exposed to Vermiculite Ore from Libby, Mont., Shown to Have High Rate of Chest Wall Abnormalities 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 ...
Mar 07, 2009· WR Grace has gone bankrupt under the weight of 100,000 asbestosrelated claims, mostly from plant workers around the US where raw vermiculite from Libby was processed. It .
The vermiculite from Libby contained asbestos. ATSDR has linked some exposures to Libby vermiculite to respiratory illnesses. Those who lived with former Zonolite and Grace workers while Libby vermiculite was being processed at the plant also were potentially exposed to asbestos. Workers may have carried home asbestos fibers on their hair ...
The correspondence stated "...we have experienced asbestosis in % of the workers (with over 10 years'' service) in Libby, as well as in 28% of the workers (with over 10 years'' service) exposed to Libby ore in the expanding plants."7 Other facilities which processed Libby vermiculite ore .
Jul 10, 2005· Workers Exposed To Libby Vermiculite Ore Have High Rate Of Chest Wall Abnormalities Date: July 10, 2005 Source: University of Cincinnati Summary: More than onequarter of tested workers at an Ohio ...
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.
» Plant Workers Exposed to Vermiculite Ore from Libby ... 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 .
The story can be traced back to 1919 when companies first started pulling vermiculite out of mines in Libby. Known commercially as Zonolite, vermiculite was used in a variety of construction materials including insulation for homes and buildings. Decades of mining the vermiculite exposed workers and residents to toxic asbestos dust.
Mar 01, 2007· facilities processed asbestoscontaminated vermiculite ore from Libby, Montana. The occupational exposure pathway for former workers exposed to airborne Libby asbestos in and around these facilities during handling and processing of vermiculite is considered a completed exposure pathway and was a public health hazard.
Workers Exposed To Libby Vermiculite Ore ... ScienceDaily. 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.
with asbestos from vermiculite ore that was received from Libby, Montana and processed at the former Vermiculite Northwest facility ... exposure to these workers is unknown. Could I be exposed to ... The Vermiculite Northwest plant processed more than 193,113 tons of Libby
Mar 18, 2008· Workers exposed to low levels of an asbestoslike mineral from Montana more than two decades ago are at an increased risk for lung disease today, according to .
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 ...
Risk of Exposure to Asbestos If You Have Vermiculite Insulation. Asbestos causes cancer and other diseases. There is no known safe level of asbestos exposure. Asbestos fibers must be airborne to cause a health risk through inhalation, so the first step is not to disturb the material, which would release more fibers into the air. If you remove ...
Vermiculite contaminated with Libby Amphibole asbestos was shipped to nearly 300 processing plants around the country. Upon delivery, the ore was exfoliated. Exfoliation is a process in which vermiculite ore is heated at high temperatures to expand or "pop" it.
The Arms of Tragedy: Libby''s Asbestos Went Far Beyond Just Libby. In Minneapolis, Minnesota, a vermiculite processing plant operated from the 1930s until the late 1980s. The plant utilized vermiculite ore from Libby for much of those 50 to 60 years, meaning many of the plant''s workers and nearby residents were at risk.
asbestosrelated lung disease. Workers employed at Supreme Perlite during were exposed to elevated levels of Libby asbestos as a result of working in and around the facility. contacts of former workers were also likely to have been exposed to Libby asbestos brought home on clothing and hair of workers. Could I be exposed to
EPA reported that the Libby vermiculite ore, even after processing it to remove impurities, remained contaminated with asbestos. This report resulted from an investigation EPA had launched in 1978, after learning that workers at a vermiculiteprocessing plant in Marysville, Ohio—one of
The vermiculite deposit at the mine in Libby, Montana, was (and is) heavily contaminated with asbestos. Numerous people were knowingly exposed to the harmful dust of vermiculite that contained asbestos. Unfortunately, the mine had been operating since the 1920s, and environmental and industrial controls were virtually nonexistent until the ...
facilities in Libby, MT. The plant produced vermiculite products from ore mined and processed in Libby through the use of two expansion furnaces, which heated the ore to approximately 2000 F. W. R. Grace documents indicate that while it operated, the plant processed over 138,000 tons of vermiculite ore .
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.
Jan 01, 2012· Health effects from occupational exposures to Libby asbestos in operations beyond Libby are emerging. Workers at a vermiculite expansion plant that produced material primarily for lawn care products were found to have increased risk of pleural abnormalities at exposures lower than those seen in Libby (Rohs et al. 2008).
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