||Health assessment document for vermiculite.
||Dynamac Corp., Rockville, MD.;Environmental Protection Agency, Research Triangle Park, NC. Environmental Criteria and Assessment Office.
|| Environmental Criteria and Assessment Office, Office of Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency,
Vermiculite--Physiological effect. ;
Air pollution ;
Public health ;
Clay minerals ;
Emission factors ;
Industrial production ;
Environmental transport ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||33 pages ; 28 cm
||Vermiculite is a nonfibrous silicate mineral with multiple consumer uses that has been shown to contain various concentrations of asbestiform fibers. Vermiculite is a micaceous hydrate of magnesium-iron-aluminum silicates with the ability to exfoliate or expand up to 20 times its original size at high temperatures. It has high-cation-exchange capacity and a very low thermal conductivity. Most of the vermiculite mined and beneficiated is exfoliated and used in construction aggregates, insulation, and agricultural applications. Exposure to vermiculite occurs mainly via the inhalation route. Nonoccupational exposure to vermiculite is high. In 1979, approximately 13 million persons were estimated to have been exposed to vermiculite. The carcinogenicity classification for vermiculite is D. However, the weight of evidence for asbestos-contaminated vermiculite is sufficient to show a causal relationship for increased lung cancer in miners and millers.
||"September 1991." Includes bibliographical references (pages 4-1-4-2). "EPA/600/8-91/037." Microfiche.
||Research Triangle Park, NC :
||See also PB85-183085 and PB88-123997. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Environmental Criteria and Assessment Office.
|Corporate Au Added Ent
||United States. Environmental Protection Agency. Environmental Criteria and Assessment Office (Research Triangle Park, N.C.) ; Dynamac Corporation.
|PUB Date Free Form
||PC A03/MF A01
|OCLC Time Stamp
|OCLC Rec Leader
||01251nam 2200289Ka 45020