StacksVerified U.S. regulatory reference

40 CFR Part 63, Table 2

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov

As stated in § 63.8790(b), you must comply with the applicable operating limits in the following table:

For each . . .You must . . .
1. Scrubbera. Maintain the daily average scrubber inlet liquid flow rate above the minimum value established during the performance test.
b. Maintain the daily average scrubber effluent pH within the operating range value established during the performance test.
c. If you use a venturi scrubber, maintain the daily average pressure drop across the venturi within the operating range value established during the performance test.
2. Other type of control device to which flame lamination emissions are ductedMaintain your operating parameter(s) within the ranges established during the performance test and according to your monitoring plan.

[68 FR 18070, Apr. 14, 2003, as amended at 86 FR 64402, Nov. 18, 2021]