vermiculite ore concern

Vermiculite Ore Concern

Asbestos - Vermiculite - EH: Minnesota Department of Health

In its pure form, vermiculite is clean, odorless, nontoxic and sterile. Recent findings about vermiculite ore contaminated with tremolite asbestos have caused concern over possible health effects for workers and others who had long-term contact.

VERMICULITE IS NOT ASBESTOS

few ore bodies have been found to contain more than tiny trace amounts. Nevertheless serious public concern was generated because of the known occurrences of asbestos in vermiculite deposits such as those in Montana that

Vermiculite - Wikipedia

Nevertheless, homes or structures containing vermiculite or vermiculite insulation dating from before the mid-1990s—and especially those known to contain the "Zonolite" brand—may contain asbestos, and therefore may be a health concern.

11.28 Vermiculite Processing - US EPA

The primary pollutants of concern in vermiculite processing are particulate matter (PM) and PM less than 10 micrometers (PM-10). Particulate matter is emitted from screening, drying, exfoliating, and materials handling and transfer operations. 2), nitrogen oxides (NO x), and sulfur oxides (SO x).

Vermiculite FAQs | Dudley Services, Inc.

The main concern is with a particular vermiculite ore that originated from a certain mine(s) in Libby, Montana. Unfortunately this ore had asbestos amphibole fibers mixed within it and was processed, bagged and installed in millions of homes throughout the world.

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.

STRATEGY FOR FURTHER ASSESSMENT OF VERMICULITE ORE ...

An estimated 105 exfoliation facilities in the US received vermiculite ore from the Libby mine. Because environmental contamination is more likely, exfoliation facilities (both former and current) that are thought to have received asbestos-contaminated ore from Libby, MT are of primary concern …

Vermiculite Insulation | Honest Home Inspections

Vermiculite itself has not been shown to be a health problem. However, some vermiculite insulation contained asbestos fibers, which can cause problems if inhaled. As long as this kind of vermiculite-based insulation remains undisturbed behind intact walls or in attic spaces and does not become airborne, it should not be a concern.

vermiculite ore concern - woodworxmarimbas.co.za

replalead ore vermiculite deal Vermiculite is a mica like mineral mined around the world and used in a variety of commercial and consumer products because of its insulating and fire resistant properties. Of concern is vermiculite ore produced by the Libby Mine in Montana from 1924 into the late 1980s, the mine officially closed in … Get price

Vermiculite - FYI Home Inspections

Of concern is vermiculite ore produced by the Libby Mine in Montana from the 1920’s to 1990. This mine had a natural deposit of asbestos which resulted in the vermiculite being contaminated with asbestos.

Libby vermiculite exposure and risk of developing asbestos ...

MALIGNANT DISEASES. In addition, mineral substances (e.g. talc or vermiculite) that contain asbestos should also be regarded as carcinogenic to humans. The most common malignancies associated with asbestos exposure are lung cancer and malignant mesothelioma …

Protect Your Family from Asbestos-Contaminated Vermiculite ...

Concerns about Asbestos-contaminated Vermiculite Insulation A mine near Libby, Montana, was the source of over 70 percent of all vermiculite sold in the United States from 1919 to 1990. There was also a deposit of asbestos at that mine, so the vermiculite from Libby was contaminated with asbestos.

Paracel Laboratories Ltd. - Asbestos / Vermiculite

Of concern is vermiculite ore produced by the Libby Mine in Montana from the 1920s to 1990. It was sold as Zonolite® Attic Insulation and possibly other brands in Canada during that time. Vermiculite from the Libby Mine often contains amphibole asbestos.

Vermiculite Insulation - www.TheHomeInspector.com - The ...

Asbestos contamination in vermiculite and vermiculite products has become a national concern to a variety of federal agencies (EPA, OSHA, CPSC and ATSDR) and to many private citizens throughout the country. A tremendous amount of information has been made available to the public via print, television/radio and the Internet.

Vermiculite Insulation and Potential Health Concerns ...

Approximately 80% of vermiculite ore mined worldwide came from the Libby, Montana mine from 1924 to 1990. The ore from this mine also included a natural deposit of amphibole/tremolite asbestos. Much of the vermiculite from Libby was contaminated with asbestos. Asbestos fibers are invisible to the eye and can only be professionally detected.

Health Canada Vermiculite Insulation Containing Asbestos

Of concern is vermiculite ore produced by the Libby Mine in Montana from the 1920s to 1990. It was sold as Zonolite® 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 vermiculite-based insulation.

Health Assessment Document for Vermiculite

Vermiculite ore was found to be contaminated with fibrous tremolite-actinolite (Amandus etaL, 1987a). The results of the mortality analysis indicated a significantly increased risk of mortality for lung cancer (20 observed, 9.0 expected, standardized mortality ratio (SMR) = 223.2, p . 0.01) and NMRD (20 observed, 8.2 expected, SMR = 243.0, p 0.05).

April 6, 1993

The primary pollutants of concern in vermiculite processing are particulate matter (PM) and PM less than 10 micrometers (PM-10). Particulate matter is emitted from screening, drying, exfoliating, and materials handling and transfer operations. In addition, vermiculite ore may contain asbestos. However, other than vermiculite mined from

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