StacksVerified U.S. regulatory reference

40 CFR Part 63, Table 1

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
For each * * *You must * * *Using * * *
1. Process Vent Stream from equipment in target HAP serviceRoute the process vent stream to a PM control device with:a. A PM percent reduction efficiency of 95 percent (98 percent for new sources), orb. An outlet concentration of 0.03 gr/dscf or lessVent collection system and PM control device, such as a wet scrubber or fabric filter, that are maintained and operated per manufacturer's recommendations.