PM2.5 Sampling Procedures
For PM2.5
sampling the following changes must be made to the filter
holder:
-
Ensure that the
multiple impactor adapter with the PM10 impactor (silver)
is installed on top of the preseparator assembly, while the
PM2.5 impactor (gold) is installed in the preseparator
assembly.
-
Clean and lubricate
the target disk at least every 2-4 sampling periods, or more frequently
depending on the degree of impaction stage soiling.
-
After the sampler
has been assembled, calibrated, verified to be in proper working order,
and a filter loaded in the filter holder assembly, set flow rate
adjustment in accordance with procedures as shown in the Operation
Manual.
- Follow all other
procedures in the Operation Manual, noting that PM2.5 is
being sampled rather than PM10 and TSP.
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