Activity matrix for filter selection

1. Activity Matrix for Filter Selection and Preparation : SPM Monitoring
Equipment Acceptance limits Frequency and
method of
measurement
Action of
requirements are
no met
Filter installation Filter rough side up
centered on screen,
edges parallel to
edges of screen to
faceplate gasket
Visual check each
filter
Void the filter;
install substitute
filter
Gasket tightened
carefully to prevent
leakage and not to
damage filter paper
i
Operational checks Stabilised initial flow
rate = established
initial flow rate +
10% for pressure
transducer* or +
15% for rotameter;
Sampling time 24 +
1 h
Visual check of each
filter and Timing
device
Perform steps in
order until flow rate
is within limits or
cause of discrepancy
is identified;
measure line
voltage, change the
filter, check
calibration, and
calibrate sampler
void the sample
Sample handling No evidence of
malfunction in post-
sampling check
Visual check of each
sample
Void the sample;
correct the cause of
malfunction
Documentation Names, sampling
dates, times; sample,
filter, and station
numbers; unusual
condition; flow
rates; and handling
dates recorded on
sample envelope
Visual check of each
sample envelope
Complete or correct
the documentation;
if not available; Void
the sample
* Applicable for automatic sample

2. (221
Activity Matrix for Filter Selection and Preparation : Sl'M Monitoring
Equipment Acceptance limits Frequency and
method of
measurement
Action of
requirements are
no met
Filter selection .0.3- um diameter
particle collection
efficiency >99%
Manufacturer's
proof of DOP test
ASTM-D29S6-71
Reject of return to
supplier
Filter collection
efficiency
. No pinholes, cuts,
creases, etc.
Visual check each
filter with light table
Reject or return to
supplier
Filter identification Identification
number in
accordance with
specifications
Visual check of each
filter
Identify properly or
discard filter
Filter condition condition for >24 h,
under constant
humidity, RH
/v-cpozv
difference within +
5%; average temp,
between 20° & 25°
C with variation less
then ± 3°C
For each sample
observe the room or
chamber conditions
o n / ^ +V10. n l i K r o + i r % n
U H U i n v v v j c m i i y i
period
Repeat conditioning
after >48 h at
ambient conditions
Filter weighting Indicated filter
weight determined
to nearest mg within
30 s after
conditioning
Gravimetric check Reweigh after >48 h
at ambient
conditions; repeat
the conditioning
Filter handling Filter handling filter
in protective folder;
envelopes
undamaged
Visual check of each
filter
Discard damaged
filters