§ 53.04. Prohibited discharge standards

No industrial user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all industrial users of the POTW whether or not they are subject to categorical pretreatment standards or any other national, state or local pretreatment standards or any other national, state or local pretreatment standards or requirement. Furthermore, no industrial user may contribute the following substances to the POTW:

(A) Pollutants which create a fire or explosive hazard in the municipal wastewater collection and POTW, including, but not limited to, wastestreams with a closed up flashpoint of less than 140 degrees Fahrenheit (60C) using the test methods specified in 40 CFR 261.21.

(B) Any wastewater having a pH less than five (5.0) or more than ten (10.0), unless authorized by the director, or otherwise causing corrosive structural damage to the POTW or equipment, or endangering sanitary district personnel. No wastewater having a pH of less than five (5.0) shall be authorized and no wastewater having a pH of more than 12 point five (12.5) shall be authorized, since this would be considered a hazardous waste under section 40 CFR 261.22 of the act.

(C) Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference.

(D) Any wastewater containing pollutants, including oxygen demanding pollutants (BOD, etc.), released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with either the POTW; or any wastewater treatment or sludge process, or which will constitute a hazard to humans or animals.

(E) Any wastewater having a temperature greater than 150 degrees Fahrenheit (65.5C), or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104˚ Fahrenheit (40C).

(F) Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through.

(G) Any pollutants which result in the presence of toxic gases, vapors or fumes within the POTW in a quantity that may cause acute worker health and safety problems.

(H) Any trucked or hauled pollutants, except at discharge points designated by the bureau in accordance with section 53.19.

(I) Any noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance, a hazard to life, or to prevent entry into the sewers for maintenance and repair.

(J) Any wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts color to the treatment plant's effluent thereby violating the Muncie Sanitary District's NODES permit. Color (in combination with turbidity) shall not cause the treatment plant effluent to reduce the depth of the compensation point for photosynthetic activity by more than ten percent from the seasonably established norm for aquatic life.

(K) Any wastewater containing any radioactive wastes or isotopes except as specifically approved by the director in compliance with applicable state or federal regulations.

(L) Subsurface drainage, condensate, deionized water, noncontact cooling water, and unpolluted industrial wastewater, unless specifically authorized by the director.

(M) Any sludges, or other residues from the pretreatment of industrial wastes.

(N) Any wastewater causing the treatment plant's effluent to fail a toxicity test.

(O) Any wastes containing detergents, surface active agents, or other substances which may cause excessive foaming in the POTW.

(P) Obstruction of flow in a sewer system or injury of the system, or a nuisance or prevention of the effective maintenance or operation of the sewer system.

(Q) Any discharge of fats, oils, or greases of animal or vegetable origin is limited to 200 mg/l.

Wastes prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW. All floor drains located in process or materials storage areas must discharge to the industrial user's pretreatment facility before connecting with the POTW.

(Ord. No. 7-95, § 2.1, 12-11-95)