13.08.480   Prohibitions on discharges.
   No 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 users of the POTW whether or not they are subject to categorical pretreatment standards or any other National, State, or local pretreatment standards or requirements.
   No person shall discharge to a public sewer wastes which, in the opinion of the director, cause, or are capable of causing either alone or by interaction with other substances:
   A.   A fire or explosive hazard;
   B.   Obstruction of flow in a sewer system or injury of the system or damage to the wastewater collection, treatment or disposal facilities;
   C.   Danger to life or safety of personnel;
   D.   A nuisance, or prevention of the effective maintenance or operation of the sewer system, through having a strong, unpleasant odor;
   E.   Air pollution by the release of toxic or malodorous gases or malodorous gas-producing substances;
   F.   No person or industrial user shall discharge to the city’s facilities any substance which has or contains:
   1.    An end-of-pipe discharge temperature in excess of one hundred fifty (150) degrees Fahrenheit (sixty-five and one-half (65.5) degrees C), or a temperature which will inhibit biological activity in the treatment plant, but in no case heat which will cause the influent at the headworks of the treatment plant to exceed one hundred four (104) degrees F (forty (40) degrees C);
   2.   More than two hundred (200) mg/l of total oil or grease;
   3.   Any gasoline, benzene, naphtha, fuel oil or other inflammable or explosive liquid, solid or gas;
   4.   Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through;
   5.   Any garbage that has not been properly shredded;
   6.   Any ashes, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, wood, or any other solid, or viscous substance capable of causing obstructions to the flow in sewers or other interference with the proper operation of the sewage system;
   7.   Any waters or wastes having a pH lower than 5.5 or higher than 9.0 or having any other corrosive characteristic capable of causing damage or hazard to structures, equipment or personnel of the sewage system;
   8.   Any waters or wastes containing toxic or poisonous substances in sufficient quantity to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals or create any hazard in the receiving waters of the sewage treatment plant;
   9.   Any noxious or malodorous gas or substance capable of creating a public nuisance;
   10.   No discharge to the sewer shall be permitted that when blended with the remaining city flow shall cause an excess of the following constituent levels in the discharge from the sewage treatment plant.
   a.   Chlorides: one hundred fifty (150) mg/l,
   b.   Dissolved solids: six hundred (600) mg/l,
   c.   Sodium ratio: seventy (70) percent,
   d.   pH, outside limits: 6.5-8.5 ph units;
   11.   Which exerts an excessive chemical oxygen demand or chlorine demand to such a degree that the total wastewater received at the sewage treatment plant exceeds treatable limits, as established by the city, for such wastewater;
   12.   Which shall produce discoloration of the sewage treatment plant effluent;
   13.   With a volume of flow or concentration of wastes constituting “slugs” as defined in Section 13.08.040;
   14.   Any substance which may cause the treatment plant's effluent or any other product of the treatment plant 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 city's facilities cause the plant to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed under Section 405 of the Act; any criteria, guidelines, or regulations affecting sludge use or disposal developed pursuant to 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;
   15.   Any substance which may cause the treatment plant to violate its NPDES permit or the receiving water quality standards;
   16.   Pollutants which create a fire or explosive hazard in the city's wastewater collection and/or treatment systems, including, but not limited to, wastestreams with a closed-cup flashpoint of less than one hundred forty (140) degrees F (sixty (60) degrees C) using the test methods specified in 40 CFR Part 261.21.
   G.   A detrimental environmental impact or a nuisance in the waters of the state or a condition unacceptable to any public agency having regulatory jurisdiction over the city; discoloration or any other condition in the quality of the city's treatment works effluent in such a manner that receiving water quality requirements established by city's NPDES permit cannot be met;
   H.   Conditions at or near the city's treatment works which violates any statute or any rule, regulation, or ordinance of any public agency or state or federal regulatory body;
   I.   Quantities or rates of flow which overload the city's collection or treatment facilities or cause excessive city collection or treatment costs. (Ord. 2011-08 § 3, 2011: Ord. 2006-02 (part), 2006: Prior code § 4245)