Seen this stuff lately?

Haven’t seen this stuff in awhile in my neck of the woods, almost caught me off guard.

I generally assume it’s likely ACM and recommend accordingly. From the little patch missing, I assume I’m not the only one :). Looked like a recent tear, someone probably sent in a sample.

Tim

ACM.jpg

Agreed.
The sampled portion of the vent pipe should have been sealed with tape after sampling.