Asbestos Abatement >> How To Estimate The Cost Of Asbestos Removal

From the early 1920s until 1990, mining operations in Libby, Montana, produced and processed vermiculite. This vermiculite, which mining companies shipped to many locations around the United States for processing, How To Estimate The Cost Of Asbestos Removal contained asbestos. 

The National Asbestos Exposure Review (NAER) is a project of the Agency for Toxic Substances and Disease Registry (ATSDR). ATSDR is working with other federal, state, and How To Estimate The Cost Of Asbestos Removal local environmental and public health agencies to evaluate public health impacts at sites that processed Libby vermiculite. 

The evaluations focus on the processing sites and on the human health effects that might be associated with possible past or How To Estimate The Cost Of Asbestos Removal current exposures. They do not consider how the products of these facilities were used by businesses or by consumers. 

The sites that processed Libby vermiculite will be evaluated by 1) identifying the ways in which people could have been exposed to asbestos in the past and How To Estimate The Cost Of Asbestos Removal the ways in which people could be exposed currently, and 2) determining whether any such exposures represent a public health hazard. 

ATSDR will use the How To Estimate The Cost Of Asbestos Removal information gained from the site-specific investigations to recommend further public health actions as needed. Site evaluations are progressing in two phases: Phase 1: ATSDR has selected 28 sites for the first phase of reviews on the basis of the following criteria: 

The U.S. Environmental Protection Agency (EPA) mandated further action at the site because of contamination in place, or How To Estimate The Cost Of Asbestos Removal The site was an exfoliation facility that processed more than 100,000 tons of vermiculite ore from the Libby mine. 

Exfoliation processing of vermiculite involves heating vermiculite at high temperatures to expand it; How To Estimate The Cost Of Asbestos Removal higher quantities of asbestos are released during exfoliation processing than in other processing methods. The following is one of the site-specific health consultations ATSDR and its state health partners are developing for each of the 28 Phase 1 sites. 

A future report will summarize findings at the Phase 1sites and How To Estimate The Cost Of Asbestos Removal include recommendations for evaluating the more than 200 remaining sites nationwide that received Libby vermiculite. Phase 2: ATSDR will continue to evaluate former Libby vermiculite processing sites in accordance with the findings and recommendations contained in the summary report. 

ATSDR will also identify further actions as necessary to protect public health. This health consultation is based on a formal site evaluation prepared by the Arizona Department of Health Services (ADHS) and How To Estimate The Cost Of Asbestos Removal summarizes an evaluation of exposure pathways and potential health impacts at a site in Arizona. 

To conduct a health consultation, a number of steps are necessary. Evaluating exposure. ADHS scientists begin by reviewing available information about environmental conditions at the site. The first task is to determine the extent of the contamination, How To Estimate The Cost Of Asbestos Removal where it is found on the site, and how people might be exposed to it. 

Usually, ADHS does not collect its own environmental sampling data. We rely on information provided by the Arizona Department of Environmental Quality (ADEQ), the U.S. Environmental Protection Agency (EPA), and How To Estimate The Cost Of Asbestos Removal by other government agencies, businesses, and the general public. Evaluating health effects. 

If the evidence shows that people are currently exposed, or could in the future be exposed, to hazardous substances, How To Estimate The Cost Of Asbestos Removal ADHS scientists will take steps to determine whether such exposure is at levels that could endanger human health. 

The health consultation focuses on public health—the health impact on the community as a whole—and is based on existing scientific information. Developing recommendations. In the health consultation, ADHS outlines its conclusions regarding any potential health threat posed by a site and offers recommendations for reducing or eliminating human exposure to How To Estimate The Cost Of Asbestos Removal contaminants. 

The role of ADHS in dealing with hazardous waste sites is primarily advisory. For that reason, the health consultation will typically make recommendations to other agencies such as EPA and ADEQ. If, however, How To Estimate The Cost Of Asbestos Removal a health threat is immanent, ADHS will issue a public health advisory warning people of the danger and will work to resolve the problem. 

Soliciting community input. The health consultation process is interactive. ADHS starts by soliciting and How To Estimate The Cost Of Asbestos Removal evaluating information from various government agencies, from the organizations responsible for cleaning up the site, and from the communities near the site. Any conclusions about the site are shared with the individuals, the groups, and the organizations that provided information. 

Once a health consultation has been prepared, ADHS seeks feedback from the public. In Libby, Montana, from the 1920s through the early 1990s, W.R. Grace and How To Estimate The Cost Of Asbestos Removal other entities related to W.R. Grace or preceding it in interest ("the mining companies”) mined, processed, and shipped millions of tons of vermiculite ore to approximately 244 sites across the United States. 

Expanded and unexpanded vermiculite from Libby had many commercial applications. Expanded (exfoliated) vermiculite included loose fill insulation, fertilizer carrier, and How To Estimate The Cost Of Asbestos Removal concrete aggregate. Unexpanded Libby vermiculite concentrate was found in gypsum wallboard, joint compound, cinder blocks, and many other building products. 

Raw vermiculite ore from Libby, Montana, is estimated to contain up to 21–26% fibrous asbestos (MRI 1982). During mining and processing operations, asbestos fibers released into the ambient air, How To Estimate The Cost Of Asbestos Removal that is, the air in and around the mining companies’ facilities. Consequently, many workers were exposed to high levels of asbestos-fiber concentrations. 

ATSDR health screening activities and How To Estimate The Cost Of Asbestos Removal other investigations within the Libby community have detected elevated levels of diseases related to asbestos exposure, such as asbestosis, mesothelioma, and lung cancer. The W.R. Grace facility at 4220 W. Glenrosa Avenue in Phoenix, Arizona, received vermiculite concentrate from the Libby, Montana, vermiculite mine. 

W.R. Grace Company has owned and operated the Arizona site since 1964. The facility is located within an industrial use area, which is approximately ½-mile square. This area is in turn surrounded by a larger mixed use area consisting of commercial and How To Estimate The Cost Of Asbestos Removal residential districts. The nearest residential areas are approximately ½-mile northeast and southwest of the facility. 

In 1964 W.R. Grace purchased the company that had previously occupied the site and, How To Estimate The Cost Of Asbestos Removal following the relocation of its vermiculite exfoliation furnace from 6960 N 52nd Street, Glendale, Arizona, began processing vermiculite concentrate and marketing it under the Zonolite® brand. 

The objective of this health consultation is to evaluate exposure pathways and potential health effects in those persons who, between 1964 and 2002, How To Estimate The Cost Of Asbestos Removal may have been exposed to Libby asbestos as a result of 1. vermiculite concentrate processing activities, 2. waste materials from the W.R. Grace exfoliation facility in Phoenix.

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