No user shall contribute or cause to be contributed into the POTW the following pollutants, substances or wastewater:
(A) Pollutants which create a fire or explosive hazard in the POTW, including, but not limited to, waste streams with a closed-cup flashpoint of less than 140°F (60°C) using the test methods specified in 40 C.F.R. § 261.21;
(B) Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference, but in no case solids greater than one-half inch in any dimension;
(C) Petroleum oil, non-biodegradable cutting oil or products of mineral oil origin in amounts that will cause interference or pass through;
(D) Any wastewater having a pH less than 6.0 or more than 9.0 or wastewater having any other corrosive property capable of causing damage or hazard to the POTW, its personnel or equipment. The POTW Director may authorize exceeding these limits via permit, consent order or administrative order. In no case, however, shall a pH less than 5.0 or greater than 11.0 be discharged to the POTW;
(E) Any wastewater containing pollutants, including oxygen-demanding pollutants (BOD and the like) or any toxic substances or any other materials (including, but not limited to, heavy metals or chemicals) in sufficient quantity (flow or concentration), either singly or by interaction with other pollutants, to cause interference with the POTW;
(F) Any wastewater which has a temperature of greater than 150°F (66°C) or which will inhibit biological activity in the POTW treatment plant resulting in interference but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104°F (40°C);
(G) Any pollutants which result in the presence of toxic gases, vapors or fumes within the POTW in a quantity that may cause worker health and safety problems;
(H) Any trucked or hauled pollutants, except at discharge points designated by the POTW Director in accordance with § 50.046 of this chapter;
(I) Any noxious or malodorous liquids, gases or solids or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for maintenance and repair;
(J) Any substance which may cause the POTWs effluent or any other product of the POTW such as residues, sludges or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case, shall a substance discharged to the POTW cause the POTW to be in non-compliance with sludge use or disposal regulations or permits issued under § 405 of the Act, the Solid Waste Disposal Act, being 42 U.S.C. §§ 6901 et seq., the Clean Air Act being 42 U.S.C. §§ 7401 et seq., the Toxic Substances Control Act being 15 U.S.C. §§ 2601 et seq. or state criteria applicable to the sludge management method being used;
(K) Any wastewater which imparts color which cannot be removed by the treatment process, including, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts sufficient color to the treatment plant’s effluent to render the waters injurious to public health or secondary recreation or to aquatic life and wildlife or to adversely affect the palatability offish or aesthetic quality or impair the receiving waters for any designated uses;
(L) Any wastewater containing any radioactive wastes or isotopes, except as specifically approved by the POTW Director in compliance with applicable state or federal regulations;
(M) Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, de-ionized water, non-contact cooling water and unpolluted industrial wastewater, unless specifically authorized by the POTW Director or provided for in an interlocal agreement with another town, county or contract user;
(N) Fats, oils or greases of animal or vegetable origin in excess of 100 mg/l at any time, except as specifically authorized by the POTW Director in a wastewater permit;
(O) Any sludges, screenings or other residues from the pretreatment of industrial wastes;
(P) Any medical wastes, except as specifically authorized by the POTW Director in a wastewater discharge permit;
(Q) Any material containing ammonia, ammonia salts or other chelating agents which will produce metallic complexes that interfere with the municipal wastewater system;
(R) Any material that would be identified as hazardous waste, according to 40 C.F.R. part 261, if not disposed of in a sewer, except as may be specifically authorized by the POTW Director;
(S) Any wastewater causing the treatment plant effluent to violate state water quality standards for toxic substances as described in 15A NCAC 2B.0200;
(T) Wastewater causing, alone or in conjunction with other sources, the treatment plant’s effluent to fail a toxicity test;
(U) Recognizable portions of the human or animal anatomy;
(V) Any wastes containing detergents, surface active agents or other substances which may cause excessive foaming in the municipal wastewater system;
(W) At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the system (or at any point in the system) be more than 5% nor any single reading over 10% of the lower explosive limit (LEL) of the meter;
(X) Any volatile organics, except as specifically authorized by the POTW Director in a wastewater permit;
(Y) Any process wastewater discharged by a permitted user which does not pass through the user’s wastewater treatment facility and/or through the sampling point designated in the user’s permit;
(Z) Any discharge of a non-routine, episodic nature, including, but not limited to, an accidental spill or non-customary batch discharge unless prior approval is obtained from the POTW Director; and
(AA) Any wastewater that requires excessive quantities of chlorine for stabilization in addition to biological treatment. The amount of excess demand will be determined by comparing the chlorine demand of the waste in question with the average chlorine demand of all other wastes entering the plant.
(Ord. passed 10-14-2021)