No user shall contribute or cause to be contributed, directly or indirectly, any pollutant or wastewater that will interfere with the operation or performance of the sewage works. These general prohibitions apply to all users of the sewage works, whether the user is subject to national, state or local pretreatment standards or requirements. A person or user may not contribute the following substances to any sewage works.
(A) Any liquids, solids or gases that, by reason of their nature or quantity, are or may be sufficient, either alone or by interaction with other substances, to cause fire or explosion, or be injurious in any other way to the sewage works or to the operation of the POTW. 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 10% of the lower explosive limit (LEL) of the meter. 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 substance that the town, the state or EPA has notified the user is a fire hazard or a hazard to the system.
(B) Solid or viscous substances that may cause obstruction to the flow in the sewage works or other interference with the operation of the POTW 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, wipes, spent grains, spent hops, waste paper, wood, plastics, gas, tar, asphalt residues, residues from the refining or processing of fuel or lubrication oil, mud, glass grinding or polishing wastes, or butchers’ offal.
(C) Any pollutant, including oxygen-demanding pollutants (BOD and the like) released in a discharge at a flow rate and/or pollutant concentration that will cause interference with the POTW.
(D) Any wastewater having a pH less than 5.0 and more than 10.0, unless the POTW is specifically designed to accommodate such wastewater, or wastewater having any other corrosive property capable of causing damage or hazard to structures, equipment and/or personnel of the POTW.
(E) Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to:
(1) Injure or interfere with any wastewater treatment process;
(2) Constitute a hazard to humans or animals;
(3) Create a toxic effect on the receiving waters of the POTW, or to exceed the limitation set forth in a categorical pretreatment standard.
(F) 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.
(G) Any substance that will cause the POTW to violate its limits and restrictions set forth in the town’s NPDES permit.
(H) Any substance with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions.
(I) Any wastewater having a temperature that will inhibit biological activity in the POTW resulting in interference; but in no case, wastewater with a temperature at the introduction into the POTW that exceeds 40°C (104°F), or any liquid or vapor discharged into the sewage works having a temperature higher than 65°C (150°F).
(J) Any unpolluted water, including, but not limited to, non-contact cooling water.
(K) Any waters or wastes containing acid, metallic pickling wastes, or concentrated plating solutions.
(L) Any toxic radioactive isotopes of such half-life or concentration as exceeds limits established by federal regulations. The radioactive isotopes 1131 and 1132 used in hospitals are not prohibited, if they are properly diluted before being discharged into the sanitary sewer.
(M) Any waters or wastes containing any toxic substances in quantities that are sufficient to interfere with the biochemical processes of the POTW, that will pass through the POTW into the receiving stream in amounts exceeding the standards set by federal, interstate, state or other competent authority having jurisdiction, or contaminated sewage sludge that contains iron or any other toxic ions, compounds or substances in concentrations or amounts exceeding the limits established from time to time by the town that exert an excessive chlorine requirement on the POTW.
(N) Any unusual volume of flow or concentration of wastes constituting slugs that, for a duration of five minutes or more, have a concentration or flow of more than five times the average concentration of the BOD, the suspended solids or flow of the customer’s sewage discharged during a 24-hour period of normal operation, and that are released in a single extraordinary discharge event that causes interference to the POTW.
(O) Any waters or wastes containing suspended solids or dissolved solids of such character and quantity that unusual provisions, attention, and expense would be required to handle such materials at the POTW, its pumping stations, or other facilities.
(P) 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 no case shall a substance discharged to the POTW cause the POTW to be in noncompliance with sludge use or disposal criteria guidelines or regulations developed under Section 405 of the Act, any criteria or guidelines of or pursuant to the Solid Waste Disposal Act, Resource Conservation and Recovery Act, the Clean Air Act, the Toxic Substances Control Act, or state criteria applicable to the sludge management method being used.
(Q) Any wastewater that causes a hazard to human life or creates a public nuisance.
(Ord. 2019-10, passed 12-2-2019)