| Text of Test Method 201A - PM10 (In-stack, CRS) (revised with figures) |
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FREQUENTLY ASKED QUESTIONS (FAQS) for Method 201A
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, EPA’s 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.
Still have questions on this method? Contact the EMC
expert Jason DeWees at
dewees.jason@epa.gov .
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