(A) Prohibitive discharge standards.
(1) General prohibitions. No contributor shall contribute or cause to be contributed into the POTW, directly or indirectly, any pollutant or wastewater that causes interference or pass through. These general prohibitions apply to all contributors to a POTW, whether or not the contributor is a significant industrial user or subject to any national, state or local pretreatment standards or requirements.
(2) Specific prohibitions. No contributor shall contribute or cause to be contributed into the POTW the following pollutants, substances or wastewater:
(a) Pollutants that create a fire or explosive hazard in the POTW, including but not limited to, wastestreams with a closed cup flashpoint of less than 140°F (60°C) using the test methods specified in 40 C.F.R. part 261.21. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides, and any other substances that the town, the state or EPA has notified the contributor is a fire hazard or a hazard to the POTW;
(b) Solid or viscous substances that may cause obstruction to the flow in the POTW resulting in interference such as, but not limited to: grease, garbage with particles greater than one-half inch in any dimension, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste paper, wood, plastics, gas, tar, asphalt residues, residues from refining or processing of fuel, lubricating oil, mud, glass-grinding or polishing wastes;
(c) Any wastewater having a pH less than 5.0 or more than 11.0, or wastewater having any other corrosive property capable of causing damage to the POTW or equipment;
(d) Any noxious or malodorous liquids, gases or solids that, 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;
(e) Any substance that may cause the POTW’s 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 cases where a substance discharged to the POTW causes the POTW to be in noncompliance with sludge use or disposal regulations or permits issued under § 405 of the Act, the Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances Control Act or state criteria applicable to the sludge management method being used, the town has the right to seek monetary compensation;
(f) Any wastewater, alone or in conjunction with other sources, causing the POTW treatment plant effluent to fail a toxicity test, to violate the town's NPDES and/or state disposal system permit or the receiving water quality standards, the town has the right to seek monetary compensation.
(g) Any wastewater that imparts objectionable color that cannot be removed by the treatment process, including but not limited to, dye wastes and vegetable tanning solutions, which consequently impart sufficient color to the POTW treatment plant's effluent to render the waters injurious to public health, secondary recreation, or to aquatic life and wildlife, or to adversely affect the palatability of fish, or aesthetic quality, or to impair the receiving waters for any designated uses.
(h) Any wastewater having a temperature greater than 150°F (66°C), or that will inhibit biological activity in the POTW treatment plant resulting in interference, and in no case wastewater that causes the temperature at the introduction into the POTW treatment plant to exceed 104°F (40°C).
(i) Any wastewater containing pollutants, including oxygen-demanding pollutants (BOD and the like), in sufficient quantity (flow or concentration), either singly or by interaction with other pollutants, to cause interference with the POTW or otherwise constitute a hazard to human or other biological life.
(j) Any wastewater containing any radioactive wastes or isotopes, except as specifically approved by the POTW Director in compliance with applicable state or federal regulations.
(k) Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through.
(l) Any pollutants that 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.
(m) Any trucked or hauled pollutants, except at the discharge points designated by the POTW Director in accordance with § 50.335.
(n) Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, non-contact cooling water and unpolluted industrial wastewater, unless specifically authorized by the POTW Director.
(o) Fats, oils or grease of animal or vegetable origin in amounts that may cause obstructions or maintenance problems in the POTW, or interference in the POTW.
(p) Any sludge, screening or other residue from the pretreatment of industrial waste.
(q) Any medical waste, except as specifically authorized by the POTW Director in a wastewater permit.
(r) Any material containing ammonia, ammonia salts or other chelating agents that will produce metallic complexes that interfere with the POTW.
(s) 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.
(t) Any wastewater causing the POTW treatment plant effluent to violate state water quality standards for toxic substances as described in 15A NCAC 2B .0020.
(u) Any wastes containing detergents, surface active agents or other substances that may cause excessive foaming in the POTW.
(v) At no time, shall two successive readings on an explosion hazard meter, at the point of discharge into the POTW (or at any point in the POTW) be more than 5%, nor any single reading over 10% of the lower explosive limit (LEL) of the meter.
(3) Pollutants, substances, wastewater or other wastes prohibited in 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 material storage areas must discharge to the industrial wastewater contributor's pretreatment facility before connecting with the POTW.
(4) When the POTW Director determines that a contributor is discharging to the POTW any of the above-enumerated substances in such amounts that may cause or contribute to interference of POTW operation or pass through, the POTW Director shall:
(B) National categorical pretreatment standards. Contributors subject to categorical pretreatment standards are required to comply with applicable standards as set out in 40 C.F.R. Ch. 1, Subch. N, parts 405 through 471, and incorporated herein.
(1) Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the POTW Director may impose equivalent concentration or mass limits in accordance with 40 C.F.R. part 403.6(c).
(2) When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the POTW Director shall impose an alternate limit using the combined wastestream formula in 40 C.F.R. part 403.6(e).
(3) A contributor may obtain a variance from a categorical pretreatment standard if the contributor can prove, pursuant to the procedural and substantive provisions in 40 C.F.R. part 403.13, that factors relating to its discharge are fundamentally different from the factors considered by EPA when developing the categorical pretreatment standard.
(4) A contributor may obtain a net gross adjustment to a categorical standard in accordance with 40 C.F.R. part 403.15.
(5) A contributor may request a removal credit adjustment to a categorical standard in accordance with 40 C.F.R. part 403.7.
(Ord. passed 6-21-2011; Am. Ord. passed 12-13-2012)