Can you use Method 201A in stacks that contain liquid droplets or are saturated with water vapor?
Method 201A cannot be used to measure emissions from stacks that have entrained moisture droplets (e.g., a wet scrubber stack), since these stacks may have water droplets larger than the cut size for the PM10-sizing device. To measure PM10 in stacks where water droplets are known to exist, EPAs Technical Information Document ( TID-009: Methods 201 and 201A in Presence of Water Droplets) recommends use of Method 5 of Appendix A to 40 CFR part 60 (or a comparable method) and consideration of the particulate catch as PM10 emissions.
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- Can you use Method 201A in stacks that contain liquid droplets or are saturated with water vapor?
