StacksVerified U.S. regulatory reference

40 CFR Part 60, Table 3

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
For these operatingparametersYou must establish these operating limitsAnd monitor using these minimum frequencies
DatameasurementDatarecordingAveraging time
Charge rateMaximum charge rateContinuous | Every hour | Daily (batch units). 3-hour rolling (continuous and intermittent units).1
Pressure drop across the wet scrubber or amperage to wet scrubberMinimum pressure drop or amperageContinuous | Every 15 minutes | 3-hour rolling.1
Scrubber liquor flow rateMinimum flow rateContinuous | Every 15 minutes | 3-hour rolling.1
Scrubber liquor pHMinimum pHContinuous | Every 15 minutes | 3-hour rolling.1

1 Calculated each hour as the average of the previous 3 operating hours.