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Resources
Clean Air Testing Labs Documents
Bulk Sampling Field Sheet
Resources Time Sheet
Project Monitoring Record
Osha Chain Of Custody
Bulk QC
TEM PCM Data
Sheet
Links
General Glossary
AHERA: Asbestos Hazard Emergency Response Act (1986);
legislation requiring the cataloging of asbestos containing building
materials in schools.
Asbestiform: tending to separate into fibers having
length:width ratios from 10:1 to over 100:1.
Asbestos: any of a group of commercially mined minerals that
tend to break into fibers. The regulated asbestos minerals are the
serpentine mineral chrysotile and the asbestiform varieties of the
amphibole minerals grunerite (amosite), riebeckite (crocidilite),
tremolite, actinolite and anthophylitte. Amphibole minerals occure in
both the regulated, asbestiform varieties and the non-regulated, non-asbestiform
varieties. The fibers are resistant to high temperatures, have high
tensile strength, and in some cases can be woven into cloth.
Asbestosis: a chronic fibrosis of the lungs caused by large
exposures to asbestos, usually affecting miners, ship-builders and
mill-workers.
EPA: Environmental Protection Agency; environmental issues
government agency.
f/cc: fibers per cubic centimeter; reporting units for PCM
analyses.
Friable: able to be crumbled to powder by hand pressure when
dry.
Mesothelioma: cancer of the lining of the lung or intestines.
MFL: millions of fibers per liter of water; reporting units for
TEM analysis of water samples.
NESHAP: National Emission Standard for Hazardous Air Pollutants
(rev. 1996).
Non-Asbestiform: tending to break into cleavage fragments
having length:width ratios from 2:! to 20:1.
OSHA: Occupational Safety & Health Administration; requires
that workers be protected from asbestos exposure.
PCM: phase-contrast microscope, an optical microscope used to
perform fiber counts on air sample filters. Its disadvantages for
asbestos analysis are that 1) it cannot resolve all asbestos fibers,
and 2) it cannot distinguish asbestos fibers from other fibers.
PEL: permissible exposure limit; OSHA mandated maximum level
for workers without respiratory protection (8 hour time weighted
average).
structures/mm2: asbestos structures, as defined by AHERA
(fiber, bundle, matrix or cluster), per square millimeter of filter;
reporting units for AHERA TEM analyses.
TEM: transmission electron microscope, highly technical
equipment used to perform asbestos analysis on air samples. It can
resolve and distinguish all asbestos fibers from other fibers.
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