Action Memorandwn Amendmenl Request: Approval of a …

The vermiculite from the libby mine was contaminated with a toxic and highly friable form of asbestos called TremoliteAdinoliteSeries Asbestos, often called Libby Asbestos (LA). For many decades, the asbestoscontaminatedvermiculite was utilized throughout town in many public places such as school tracks, public parles, and baseball fields ...

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Study of Asbestos Contamination of Former Vermiculite ...

Abstract The Environmental Protection Agency (EPA) has determined that vermiculite ore mined at the former Grace vermiculite mine in Libby, Montana, is contaminated with asbestos. Libby ore was processed at vermiculite exfoliation plants across …

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Mapunapuna site high on list for asbestos cleanup | The ...

Jun 28, 2004· Mapunapuna site high on list for asbestos cleanup. By Timothy Hurley Advertiser Staff Writer. The federal government has listed a former Mapunapuna manufacturing plant on a priority list of sites studied for health concerns in connection to shipments of asbestoscontaminated vermiculite ore from a Montana mine.

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CBC News In Depth: Consumers: Vermiculite

Vermiculite was once touted as a miracle mineral: it's fireresistant and has strong insulation properties. ... More than 680 million kilograms of raw contaminated ore was sent to processing ...

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What is vermiculite insulation? my attic? Do I have ...

supply of vermiculite came from a mine near Libby, Montana. This mine had a natural deposit of asbestos which resulted in the vermiculite being contaminated with asbestos. Attic insulation produced using vermiculite ore, particularly ore that originated from the Libby mine, may contain asbestos fibers. Today, vermiculite is mined at

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AsbestosContaminated Vermiculite Malignant Mesothelioma ...

The Environmental Protection Agency (EPA) mandated further action at the site on the basis of current contamination; or; The site was an exfoliation facility that processed roughly 100,000 tons or more of vermiculite from the Libby mine. Exfoliation is a process in which vermiculite ore is heated at high temperatures to expand or "pop" it.

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~~ WASHINGTON, DC 20460

address asbestos contamination from vermiculite ore received from Libby, MT (See Attachment A). EP A has conducted indoor residential assessments and cleanup at the Libby, MT National Priorities List (NPL) site. The removal of vermiculite insulation as part of the indoor residential

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Hazardous Substance Tools: What about vermiculite?

Only a few vermiculite ores contain asbestos. However, between 1960 and 1990, 70 percent of the world’s vermiculite ore came from a mine in Libby, MT, and was marketed as Zonolite. That particular ore is contaminated with tremolite, one of the six asbestos mineral forms.

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Vermiculite Health, Safety and Environmental Aspects

Vermiculite and other ore bodies can contain a variety of associated minerals such as mica, quartz, feldspar, etc. ... vermiculites contaminated with trace amounts of asbestiform material. Vermiculite ore ... Information given in this booklet is only intended as an introduction to health, safety and environmental aspects of vermiculite. It does ...

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Health Assessment Document for Vermiculite

In a review of nonasbestos fibrous materials, Lockey (1981) concluded that vermiculite itself did not produce adverse health effects, but noted that vermiculite ore may contain asbestos fibers. In a later study by Lockey et al. (1984), workers exposed to vermiculite contaminated …

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Schundler Company Vermiculite Technical Information ...

Dec 07, 2014· Finally because of the current confusion about vermiculite and asbestos, our plant was inspected recently (February 7, 2000) by representatives of the federal Environmental Protection Agency. Twelve samples of our vermiculite were taken from random areas of our ore piles, and then tested by Lockheed Martin Technology Services Group.

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Inspections Unlimited AsbestosContaminated Vermiculite ...

Sizes of vermiculite products range from very fine particles to large (coarse) pieces nearly an inch long. Concerns about Asbestoscontaminated 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.

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Big Tex Asbestos Contamination Resolved

May 15, 2012· Vermiculite ore is refined by rapidly expanding the ore with heat, a process known as exfoliation. As water in the ore becomes steam, it causes the rock to explode. The result is a lightweight, fireresistant construction material. Vermiculite contaminated with asbestos can release airborne asbestos fibers and they can be inhaled by anyone ...

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Radiographic Evidence of Nonoccupational Asbestos Exposure ...

Jan 01, 2012· 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 …

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Asbestos Vermiculite EH: Minnesota Department of Health

A member of the phyllosilicate group of minerals, it resembles mica in appearance. 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 longterm contact.

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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 …

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GAO0871 Hazardous Materials: EPA May Need to Reassess ...

AsbestosContaminated Ore from Libby, Montana, Highlights of . GAO0871, a report to and Should Improve Its Public Notification Process. congressional requesters Between 1923 and the early 1990s, a mine near Libby, Montana, shipped millions of tons of asbestoscontaminated vermiculite ore to sites throughout the United States.

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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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Vermiculite Northwest Fact Sheet, 2009 Update

Fact Sheet – 2009 Update . DOH 334190 1RYHPEHU The Washington State Department of Health, in cooperation with the Agency for Toxic Substances and Disease Registry (ATSDR), conducted a health consultation to evaluate potential health risks associated with asbestoscontaminated vermiculite ore processed at the

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Federal Register :: Disease Progression in Persons Exposed ...

The purpose of the program is to conduct followup medical screening programs for persons exposed to vermiculite ore in Libby, MT or shipped from Libby to other locations for packaging and processing, who had past exposures to asbestoscontaminated vermiculite ore during processing and/or packaging, and who underwent past medical testing for ...

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YOUR HOME; Removing Asbestos in Vermiculite The New York ...

Jan 21, 2001· Dr. Weis said that in most cases, vermiculite becomes contaminated with asbestos because the two minerals form under the same geological conditions. So when vermiculite is mined, the ore …

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Vermiculite, Respiratory Disease, and Asbestos Exposure in ...

Jan 03, 2007· Vermiculite from the mine near Libby, Montana, is contaminated with tremolite asbestos and other amphibole fibers (winchite and richterite). Asbestoscontaminated Libby vermiculite was used in loosefill attic insulation that remains in millions of homes in …

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Health Consultation

vermiculite processing plants that received asbestoscontaminated vermiculite ore from Libby, Montana. The site is located in a mixed industrial and residential area of St. Louis with major railroad lines north and south of the property (See Figure 1 and 2). Population data are …

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Vermiculite Wikipedia

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 …

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vermiculite NW 041608 2 Oregon

Figure 1 – Former Vermiculite Northwest vicinity Site History Vermiculite Northwest (the Zonolite Division of Grace) manufactured, packaged, and stored commercial vermiculite insulation products from 1950 to 1993. Vermiculite, which was mined in Libby, Montana, is known to be contaminated with several different forms of asbestos.

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Zonolite Serpentine or Amphibole? — Wenatchee Home Inspection

Dec 16, 2019· Vermiculite ore that was mined in Libby, Montana was often contaminated with naturally occurring asbestos. Libby, Montana, was the source of over 70 percent of all vermiculite sold in the United States from 1919 to 1990. From the EPAGold miners discovered vermiculite in …

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[ACTION MEMORANDUM REGARDING CLASSIC EMERGENCY …

May Need to Reassess Sites Receiving AsbestosContaminated Ore from Libby, Montana, and Should Improve Its Public Notification Process.” The Vermiculite Products Inc. facility is an active vermiculite exfoliation facility that processes vermiculite for use in concrete aggregat e. The facility has been in operation since 1941.

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Exposure to AsbestosContaining Vermiculite Ore and ...

Jul 01, 2010· 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 contamination of the community. The mine closed in 1990.

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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 an overview | ScienceDirect Topics

Attic insulation produced using vermiculite ore, particularly ore that originated from the Libby mine, may contain asbestos fibers. Today, vermiculite is mined at three facilities and in other countries that have low levels of contamination in the finished material. Health Problems. Asbestos can cause health problems when inhaled into the ...

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Summary Report Exposure to AsbestosContaining Vermiculite ...

Oct 29, 2008· Exposure to AsbestosContaining Vermiculite from Libby, Montana, at 28 Processing Sites in the United States . October 29, 2008 ... Vermiculite ore Vermiculite that has been removed from the ground (mined), but not yet ... current contamination, or …

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EPA's Current Best Practices for Vermiculite Attic ...

This mine had a natural deposit of asbestos which resulted in the vermiculite being contaminated with asbestos. Attic insulation produced using vermiculite ore, particularly ore that originated from the Libby mine, may contain asbestos fibers. ... EPA's Current Best Practices for Vermiculite Attic Insulation…

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Western Mineral Products: Vermiculite Processing ...

Vermiculite Processing Operations in Northeast Minneapolis. Vermiculite ore containing hazardous Libby asbestos was processed in Northeast Minneapolis from 19381989. This page contains information about the vermiculite, ways people were exposed, potential …

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