No user shall discharge or cause to be discharged, directly or indirectly, any of the following described substances into the wastewater disposal system or to any public sanitary sewer:
(A) Any liquids, solids or gases which 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 wastewater disposal system or to the operation of the system. 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. 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;
(B) Solid or viscous substances which will or may cause obstruction to the flow in a sanitary sewer or other interference with the operation of the wastewater treatment facilities 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, plastic, gas, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes;
(C) Any wastewater having a pH less than 5.0 or greater than 9.5 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the wastewater disposal system;
(D) Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to inhibit or disrupt any wastewater treatment process, constitute a hazard to humans or animals or create a toxic effect in the receiving waters of the wastewater disposal system. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to § 307 (a) of the Act;
(E) Any noxious or malodorous liquids, gases or solids which either singly or by interaction with other wastes are capable of creating a public nuisance or hazard to life or are sufficient to prevent entry into the sanitary sewers for their maintenance and repair;
(F) Any wastewater with objectionable color not removed in the treatment process, such as but not limited to dye wastes and vegetable tanning solutions;
(G) Any wastewater which creates conditions at or near the wastewater disposal system which violate any statute or any rule, regulation or ordinance of any public agency or state or federal regulatory body;
(H) Any wastewater having a temperature greater than 150 degrees F (65.6 degrees C) or causing, individually or in combination with other wastewater, the influent at the wastewater treatment plant to have a temperature exceeding 104 degrees F (40 degrees C);
(I) Any slug load, which shall mean any pollutant, including oxygen demanding pollutants (BOD and the like), released in a discharge of such volume or strength as to cause inhibition or disruption in the wastewater disposal system. In no case shall a slug load have a flow rate or contain concentrations or quantities of pollutants that exceed for any time period longer than 15 minutes more than five times the average 24 hour concentrations, quantities or flow of the user during normal operations;
(J) Noncontact cooling water or unpolluted storm or groundwater;
(K) Any wastewater containing fats, wax, grease or oils, whether emulsified or not, in excess of 150 mg/l or containing substances which may solidify or become viscous at temperatures between 32 degrees F and 150 degrees F (0 degrees C and 65.6 degrees C) and any wastewater containing oil and grease concentrations of mineral origin of greater than 100 mg/l, whether emulsified or not;
(L) Wastewater containing inert suspended solids (such as but not limited to Fullers earth, lime slurries and lime residues) or of dissolved solids (such as, but not limited to sodium chloride and sodium sulfate) in such quantities that they would cause disruption with the wastewater disposal system;
(M) Any wastewater having a BOD5 greater than 650 mg/l or having a suspended solids concentration of greater than 350 mg/l, unless otherwise permitted by the city; and
(N) In addition to these prohibitions, no user shall discharge to any public sanitary sewer any discharge which will cause interference with the wastewater disposal system.
(Ord. 297, passed 3-1-2022)