135 Glossary of Terms
EVM Series User Manual
Glossary of Terms
The American Conference of Governmental Industrial Hygienists organization in the
United States.
Sampling for pollutants in the air using a variety of means such as sorbent tubes,
bags, filters and sampling conventions.
Any substance in air that could, in high enough concentration, harm man, other
animals, vegetation, or material. Pollutants may include almost any natural or artificial
composition of airborne matter capable of being airborne. They may be in the form of
solid particles, liquid droplets, gases, or in combination.
Air pollution are chemicals present in the atmosphere which are normally not a part
of the atmosphere. Basically, air pollution is air that is contaminated, interferes with
human health or welfare, or harms the environment. Some examples include dust,
smoke, and a variety of toxic gases such as carbon monoxide.
Sampling, measurement/analysis of airborne pollutants.
The level of pollutants prescribed by regulations that are not to be exceeded during a
given time in a defined area.
Total suspended particulate matter found in the atmosphere as solid particles or
liquid droplets. Chemical composition of particulates varies widely, depending on
location and time of year. Airborne particulates include: windblown dust, emissions
from industrial processes, smoke from the burning of wood and coal, and motor
vehicle or non-road engine exhausts.
The American Society of Heating, Refrigeration and Air-Conditioning Engineers in the
United States.
A functional test of the sensors installed in the gas monitor. Calibration gas is used
for a bump test.
Calculating particulate
matter
The worker exposure assessment, on the EVM, is based on a gravimetric analysis
with filter samples drawn over a period time. If acute effects exist from personal
inhalable dust, the sampling analysis allows for short term analysis (STEL).
This is the maximum allowable concentration of a chemical that an employee may be
exposed to. It must never be exceeded, even for an instant.
Confined Space (see
also “Permit Required
Confined Space”)
A “Confined Space” has three components:
a. It is large enough to enter & perform work
b. It has limited means for entry & exit
c. It is not designed for continuous occupancy
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