40 CFR Part 60, Table 2 — Operating Limits for Wet Scrubbers
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| For these operating parameters | You must establish these operating limits | And monitoring using these minimum frequencies |
|---|---|---|
| Data measurement | Data recording | Averaging time |
| Charge rate | Maximum charge rate | Continuous | Every hour | Daily (batch units) 3-hour rolling (continuous and intermittent units).1 |
| Pressure drop across the wet scrubber or amperage to wet scrubber | Minimum pressure drop or amperage | Continuous | Every 15 minutes | 3-hour rolling.1 |
| Scrubber liquor flow rate | Minimum flow rate | Continuous | Every 15 minutes | 3-hour rolling.1 |
| Scrubber liquor pH | Minimum pH | Continuous | Every 15 minutes | 3-hour rolling.1 |
1 Calculated each hour as the average of the previous 3 operating hours.