Libby amphibole tremolite

Author: vetp

August undefined, 2024

Web21. dec 2024. · Osha believes that as a whole the animal experiments conducted confirm that for clearly differentiated dust populations, qualitative differences in ... WebLibby, Montana by the author (MEG) in October 1999. The UI tremolite sample was selected to represent a non-fibrous amphibole and to obtain data on cleav-age fragments. The NIST tremolite was selected for a comparison to the Libby amphiboles. In general, tremolite samples were selected because the amphib-oles from Libby had been …

PECKHAM, JOHN Et Al v. AMERICAN OPTICAL CORPORATION Et …

WebFibrous amphibole asbestos from Libby (LAA) is composed of winchite (70%), richterite (9%), tremolite (5%), and non-amphibole minerals (16%) with a mean aspect ratio of 8.4 ± 0.7. C57BL/6 mice ... WebTremolite is a member of the amphibole group of silicate minerals with composition: Ca 2 (Mg 5.0-4.5 Fe 2+ 0.0-0.5)Si 8 O 22 (OH) 2.Tremolite forms by metamorphism of sediments rich in dolomite and … marco antonio panduro gonzales

Types of Asbestos That Can Cause Asbestos Diseases ACC

Web27. dec 2024. · Tremolite was the only regulated asbestos fiber found in the raw vermiculite ore, 2 but in 2003, Meeker et al. determined that the Libby amphibole (LA) was composed of toxic nonregulated amphibole fibers, including winchite (84%), and richterite (11%), in addition to tremolite (6%). 3 Several occupations in the Libby area have been … WebWho Is CARD. In the northwest corner of Montana, in the rural community of Libby, the Center for Asbestos Related Diseases (CARD) has emerged as a national center of excellence in addressing healthcare issues associated with Libby amphibole (previously called tremolite) asbestos. The CARD is a non-profit 501 (c) 3 governed by a volunteer ... Webseveral specific minerals of interest, including Libby amphibole, edenite, ferroactinolite, anthophyllite, tremolite, winchite, richterite, and erionite (U.S. EPA, 2006). Asbestos is a generic commercial term describing several silicate minerals where crystalline growth produces very long, thin, flexible, separable fibers. marco antonio patacho

Federal Register :: Asbestos; Reporting and Recordkeeping …

Toxicological Review of Libby Amphibole Asbestos in Support of …

Web01. okt 2000. · Changing amphibole nomenclature, uncertainties in Fe +2 /Fe +3, and natural compositional variability result in samples of the asbestiform amphibole from … WebTremolite is a noncommercial form of amphibole mineral that is present in some chrysotile, talc, and vermiculite deposits. Inhalation of asbestiform tremolite is suspected to have caused or contributed to an increased incidence of mesothelioma in certain mining settings; however, very little is known about the magnitude of tremolite exposure that occurred at … cso divorceWebThe presence of the blue sodium-rich amphibole glaucophane defines rocks of ... Though these amphiboles have historically been referred to as tremolite (or soda ... 2003; Meeker, 2003). Microprobe characterization of the material from Libby, MT, indicates the mineral has an average percent composition of 56.8 SiO 2, 1.9 FeO, 4.5 Fe 2 O 3 ... cso divorce rates

"Web01. apr 2007. · BackgroundVermiculite from the mine near Libby, Montana, is contaminated with tremolite asbestos and other amphibole fibers (winchite and richterite). Asbestos … " - Libby amphibole tremolite

Libby amphibole tremolite

Toxicological Review of Libby Amphibole Asbestos in Support of …

WebIn particular, Libby Amphibole Asbestos (“LAA”) is known to be present with a silicate, mica‐like mineral called vermiculite, extracted from an open pit mine near Libby, Montana, until its closure in 1990.21Thus, EPA is proposing to add LAA (and its tremolite, winchite, and richterite constituents) as well as vermiculite to the scope of ... http://www.minsocam.org/MSA/AmMin/TOC/Abstracts/2000_Abstracts/Oct00_abstracts/Wylie_p1540_00.pdf

Did you know?

Web22. maj 2013. · Vermiculite mined from Zonolite Mountain, located approximately 7 miles northeast of Libby, MT, contained amphibole asbestos fibers including winchite, richterite, and tremolite, 1 and are ... Web28. okt 2013. · The physical properties of different types of asbestos may strongly affect health outcomes in exposed individuals. This study was designed to provide understanding of the comparative toxicity of naturally occurring asbestos (NOA) fibers including Libby amphibole (LA), Sumas Mountain chrysotile (SM), El Dorado tremolite (ED) and …

WebTesting Status of Libby Amphibole 2007 09075; Testing Status of Libby Amphibole 2007 09075 . CASRN: LA2007 Related: Tremolite, Edenite, Richterite, and Winchite Short-Term Toxicity. 7 months (Inhalation) (C09075) On Test . Rats: Harlan Sprague-Dawley; Dose: 0, 0.1, 0.3, 1, 3, 10 mg/m3; n=35 males/exposure concentration or n=50 females/exposure ... Web01. nov 2024. · Fibrous amphibole asbestos from Libby (LAA) is composed of winchite (70%), richterite (9%), tremolite (5%), and non-amphibole minerals (16%) with a mean aspect ratio of 8.4 ± 0.7. C57BL/6 mice were exposed by oropharyngeal aspiration to fiber suspensions at a very low dose of 3 μg/mouse.

WebA small cohort of 194 men with low exposure to fibrous tremolite (mean 0.75 f/ml y) in the mining and milling of vermiculite in South Carolina experienced 51 deaths 15 years or more from first employment. The SMR (all causes) was 1.17 reflecting excess deaths from circulatory disease. There were four deaths from lung cancer and 3.31 expected ... Web15. feb 2012. · The amphiboles from the Vermiculite Mountain vermiculite deposit, primarily winchite and richterite, are related to tremolite and in the past have been referred to as …

WebName: Tremolite RRUFF ID: R060311 Ideal Chemistry: Ca 2 (Mg 5.0-4.5 Fe 2+ 0.0-0.5)Si 8 O 22 (OH) 2 Locality: Khyber Pass area, Khyber Agency, North-West Frontier Province, Pakistan Source: Herb Obodda 005 Owner: RRUFF Description: Colorless fragment Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical …

Web04. apr 2024. · Background on/Uses of Asbestos for Part 2 of the Risk Evaluation. For Part 2 of the Risk Evaluation for Asbestos, EPA will consider chrysotile (serpentine), crocidolite (riebeckite), amosite (cummingtonite-grunerite), anthophyllite, tremolite, actinolite, and Libby Amphibole Asbestos (and its tremolite, winchite and richterite constituents). marco antonio pedrazaWeb06. maj 2024. · The Environmental Protection Translation (EPA) is proposing reporting and recordkeeping requirements with absorption under the Poisons Substances Control Act (TSCA). EPA proposes to require certain persons that manufactured (including imported) or processed asbestos and asbestos-containing articles... marco antonio perez cruzWebPhysical properties. Long prismatic, acicular, or fibrous crystal habit, Mohs hardness between 5 and 6, and two directions of cleavage intersecting at approximately 56° and 124° generally suffice to identify amphiboles in hand specimens. The specific gravity values of amphiboles range from about 2.9 to 3.6. Amphiboles yield water when heated in a closed … cso dllWebTremolite Asbestos. Tremolite asbestos is known for its heat resistant properties and can also be woven into fabric. Like other asbestos in the amphibole family, tremolite has sharp fibers that can easily be inhaled or ingested. Tremolite is no longer mined and is responsible for many cases of asbestos-related cancer and asbestos diseases. marco antonio pedroniWeb01. okt 2008. · Libby, Montana is the site of a large vermiculite deposit that was mined between 1920 and 1990 to extract vermiculite for commercial applications such as … csodtravelcentersWebLibby Amphibole asbestos is in the tremolite subgroup and historically has been reported as a sodium-rich tremolite (Larsen, 1942; Boettcher, 1966; Leake, 1978). However, a more exact analysis of Libby Amphibole asbestos, characterizing the cation composition of individual fibers to better define the amphiboles present, indicates winchite and ... marco antonio perez alejoWebAmphibole ( tremolite) Amphibole ( / ˈæmfəboʊl /) is a group of inosilicate minerals, forming prism or needlelike crystals, [1] composed of double chain SiO. 4 tetrahedra, linked at the vertices and generally containing ions of … cso dei tintori florenz