Particulate PM10
PM10 is particulate matter that is less than
10 microns in size. Typical particulate tests are Total Suspended
Particulate (TSP) that is all particulate discharged from a stack.
A PM10 test will separates the particulate depending on the size
of the particles. The National Environmental Standards (NES) issued
by the Ministry for the Environment refer to PM10.
The test method used by K2 Environmental is USEPA OTM 27. This
method determines the size of the particles in the gas stream emitted
to the atmosphere. The test will determine the fraction of:
- Particulate Matter greater than 10 microns
- Particulate Matter less than 10 microns
The photo below shows the sampling head used to separate the particulate
in a stack. This method can also report the particulate that is
less than 2.5 microns (PM2.5)
Condensable Particulate
Particulate matter that forms from condensing
gases or vapors is referred to as condensable particulate matter.
Condensable particulate matter forms by chemical reactions as well
as by physical phenomena.
Condensable particulate matter is usually formed from material
that is not particulate matter at stack conditions but which condenses
and/or reacts upon cooling and dilution in the ambient air to form
particulate matter. The formation of condensable particulate matter
occurs within a few seconds after discharge from the stack.
From a health standpoint, condensable particulate matter is important
because it is almost entirely contained in the PM2.5
classification.
Sampling for condensible matter will be with USEPA 202, however
the improvements advocated by the dry impinger method will be incorporated
into the test sample. Condensable particulate matter is determined
after a particulate train.
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