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significant industrial user14 [Regulation]

Definition:
Includes all industrial users that are subject to categorical pretreatment standards and other users that discharge an average of 25,000 gpd of process wastewater to the POTW or contributes a process wastestream which makes up 5% or more of the average flow to the POTW. For a complete definition see the source document.

Source:
40 CFR 403.3