Except where authorized to do so by an applicable pretreatment standard or requirement,
no industrial user shall ever increase the use of process water, or in any other way
attempt to dilute a discharge as a partial or complete substitute for adequate treatment
to achieve compliance with a pretreatment standard or requirement. The director may
impose mass limitations on industrial users which are using dilution to meet applicable
pretreatment standards or requirements, or in other cases where the imposition of
mass limitations is appropriate.
