Notwithstanding the limitations set forth in these regulations, a special variance or amendment may be issued whereby a waste of unusual character or strength may be accepted when, in the opinion of the Authority, unusual or extraordinary circumstances compel special terms or special conditions. As a separate and additional requirement, such variance or amendment will be issued only when, in the opinion of the Authority, it would not have any deleterious effect on the system by causing interference with or disruption in the treatment works, or violation of the NPDES permit or state water quality criteria or standards. In no case shall a discharge be approved which would exceed the limits established by a National Categorical Pretreatment Standard.
A user seeking a variance or amendment shall petition the Authority in writing and provide documentation of the exceptional circumstances which the user believes would justify a variance or amendment. If a variance or amendment is approved by the Authority, the user shall pay a surcharge in addition to the applicable service charges. Said surcharge shall be established by the Authority for each variance or amendment granted.