StacksVerified U.S. regulatory reference

40 CFR Part 60, Table 2

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
Minimum screening frequencyMinimum detection threshold of screening technology *(kg/hr)
Semiannual≤1
Triannual≤2
Triannual + Annual OGI≤10
Quarterly≤5
Quarterly + Annual OGI≤15
Bimonthly≤15

* Based on a probability of detection of 90%