CALCULATIONS:
12. Calculate the concentration of respirable particulate, C (mg/m3), in the air volume sampled, V (L):
where:
W1
= tare weight of filter before sampling (mg)
W2
= post-sampling weight of sample-containing filter (mg)
B1
= mean tare weight of blank filters (mg).
B2
= mean post-sampling weight of blank filters (mg)
V = volume as sampled at the nominal flowrate (i.e., 1.7 L/min or 2.2 L/min)