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vermiculite ore assessment

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What is Vermiculite? The Vermiculite Association

Vermiculite is mined using open cast mining techniques where the ore is separated from other minerals and then screened or classified into several basic particle sizes. Every care is taken in mining operations to minimize the impact on the environment and to restore land to its natural condition when mining ends.

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vermiculite ore processing

STRATEGY FOR FURTHER ASSESSMENT OF . Strategy for Further Assessment of Vermiculite Ore Asbestos Sites September 30, 2008 I. Background : The Agency is committed to developing a …

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Supreme Perlite Portland, Oregon

with asbestos from vermiculite ore that was received from Libby, Montana and processed at Supreme Perlite 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 1968 through 1974. This factsheet outlines some of the important findings from

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Vermiculite Intermountain HC02272007release

VERMICULITE INTERMOUNTAIN AND INTERMOUNTAIN PRODUCTS, INC. SALT LAKE CITY, SALT LAKE COUNTY, UTAH ... Public Health Service Agency for Toxic Substances and Disease Registry Division of Health Assessment and Consultation Atlanta, Georgia 30333 . Health Consultation: A Note of Explanation ... Vermiculite ore from the Libby, Montana mine contained ...

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Resolving the Vermiculite Asbestos Conflict

Risk Assessment Models – Low Dose Case Studies . ... process the ore, and promoted the material under the trade name of Zonolite. This ... Operators mined most of the vermiculite ore through large open cuts; several adits, one 750 feet long, also provided access to the ore. Initial processing took place at a

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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. ... Risk Assessment from Mining in the Iron Ore Mine. In the past, workers were exposed to aerosols containing high concentrations of asbestos fibers.

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Vermiculite Insulation Identification

Vermiculite insulation identification. How to identify vermiculite or vermiculite insulation by visual inspection. ... An IMC official said Koos purchased vermiculite ore from American Vermiculite (a South African mine) and from Grace, but, to their knowledge, none of the ore came from the Libby mine. ... "Hazardous Materials: EPA’s ...

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Libby vermiculite exposure and risk of developing asbestos ...

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.

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Health Safety The Vermiculite Association

Vermiculite is mined using open cast mining techniques where the ore is separated from other minerals and then screened or classified into several basic particle sizes. Every care is taken in mining operations to minimize the impact on the environment and to restore land to its natural condition when mining ends.

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UC HealthNews : LowLevel Exposure to 'AsbestosLike ...

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 fiber that can become airborne and inhaled when used in manufacturing.

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vermiculite beneficiation

Vermiculite Beneficiation Ore vermiculite mining in kenya vermiculite mining in kenya Mica and vermiculite in South Africa*saimm . ... epa/600/891/037 september 1991 health assessment document for vermiculite environmental criteria and assessment office office of health and environmental assessment office of research and development ...

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Exposure to AsbestosContaining Vermiculite Ore and ...

BackgroundLibby, 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 contamination of the community.

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asbestos ore types

Dosimetric and Toxicologic Assessment of Amphibole Fiber Containing Material from Libby, Montana as asbestos contaminated vermiculite ore from Libby was shipped to hundreds of locations a comparative fashion with respect to different types of asbestos, including fibers not associated

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Study of Asbestos Contamination of Former Vermiculite ...

Historically, vermiculite has been used for a variety of products including loosefill insulation, as a carrier for agricultural chemicals, and as an additive in potting The vermiculite ore from Libby was mined from an open pit and beneficiated, crushed, sized, and sorted at the mine site into vermiculite …

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Vermiculite Wikipedia

Vermiculite is a 2:1 clay, meaning it has two tetrahedral sheets for every one octahedral sheet. It is a limitedexpansion clay with a medium shrinkswell capacity. Vermiculite has a high cation exchange capacity (CEC) at 100–150 meq/100 g.

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Health Assessment Document for Vermiculite EPA

EPA/600/891/037 SEPTEMBER 1991 HEALTH ASSESSMENT DOCUMENT FOR VERMICULITE ENVIRONMENTAL CRITERIA AND ASSESSMENT OFFICE OFFICE OF HEALTH AND ENVIRONMENTAL ASSESSMENT OFFICE OF RESEARCH AND DEVELOPMENT ENVIRONMENTAL PROTECTION AGENCY RESEARCH TRIANGLE PARK, NC 27711 Printed on Recycled Paper ... Vermiculite ore was …

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vermiculite ore exposure

epa/600/891/037 september 1991 health assessment document for vermiculite environmental criteria and assessment office office of health and environmental assessment office of research and development environmental protection agency research triangle park, nc 27711 printed on recycled paper

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EPA Research in Montana | US EPA

EPA Research in Montana. ... Libby amphibole asbestos (LAA) has been found to cooccur with the vermiculite ore that was mined in Libby, Montana starting in the 1920s. ... The assessment was able to identify a level of exposure that, over a lifetime, would be unlikely to cause such effects on the lung membranes. This was the first quantitative ...

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vermiculite NW 041608 2

Division of Health Assessment and Consultation Atlanta, Georgia 30333 . Health Consultation: A Note of Explanation ... • The site was an exfoliation facility that processed more than 100,000 tons of vermiculite ore from Libby mine. Exfoliation, a processing method in which ore is heated and

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vermiculite ore y

Vermiculite Ore. Palabora Vermiculite is a lamellar flakelike hydrated magnesiumironaluminium silicate. Geologically Palabora vermiculite arises from the weathering, over time, of phlogopite mica. During the weathering process alkalis present in the mica are leached and replaced with water.

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E E INC LETTER REPORT FOR WESTERN MINERAL …

site assessment activities for the WMP site are presented in Attachment B. ... vermiculite ore by railcar. EPA and START personnel observed the soil to contain a large concentration of raw vermiculite ore. START collected the 8ounce composite sample at this location.

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Dosimetric and Toxicologic Assessment of Amphibole Fiber ...

Dosimetric and Toxicologic Assessment of Amphibole FiberContaining Material from Libby, Montana ... The leading source of vermiculite ore for the United States and the world from about ... assessment, including inherent toxicity of LA relative to other forms of asbestos and differential ...

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Vermiculite is a porous mineral used as insulation, and to ...

Vermiculite is a mineral ore that is composed of hydrated laminar magnesiumaluminumiron silicate (1). Vermiculite ores may also contain a range of other minerals including asbestos (1).

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Lincoln County Asbestos Resource Program Vermiculite Libby

Most vermiculite is not contaminated with asbestos. However, the vermiculite ore taken from a mining operation in Libby, Montana, was contaminated with asbestos amphibole minerals, including tremolite and actinolite. ... The Lincoln County ARP is born.

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