- Table 3 to Subpart DDDD of Part 60—Model Rule—Operating Limits for Wet Scrubbers

For these operating
parameters
You must establish these operating limits And monitor using these minimum frequencies Data
measurement
Data
recording
Averaging time Charge rateMaximum charge rateContinuousEvery hourDaily (batch units). 3-hour rolling (continuous and intermittent units). 1Pressure drop across the wet scrubber or amperage to wet scrubberMinimum pressure drop or amperageContinuousEvery 15 minutes3-hour rolling. 1Scrubber liquor flow rateMinimum flow rateContinuousEvery 15 minutes3-hour rolling. 1Scrubber liquor pHMinimum pHContinuousEvery 15 minutes3-hour rolling. 1

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