13.08.140 Wastes subject to review by city.

   No person shall discharge or cause to be discharged the following described substances, materials, waters or wastes if it appears likely in the opinion of the governing body of the city, that such wastes can harm either the sewers, sewage treatment process, or equipment, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, or public property, or constitute a nuisance. In forming an opinion as to acceptability of these wastes, the governing body of the city will give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction of the sewers, nature of the sewage treatment process, capacity of the sewage treatment plant, degree of treatability of wastes in the sewage treatment plant, and other pertinent factors. The substances which must be considered are:

   A.   Any liquid or vapor having a temperature higher than one hundred fifty degrees Fahrenheit or sixty-five degrees Celsius;

   B.   Any water or waste containing fats, grease, wax, or oils, whether emulsified or not, in excess of one hundred mg/1 or containing substances which may solidify or become viscous at temperatures between thirty-two and one hundred fifty degrees Fahrenheit (zero and sixty-five degrees Celsius);

   C.   Any garbage that has not been properly shredded. The installation and operation of any garbage grinder larger than those normally manufactured and sold for residential and noncommercial use will not be installed without specific review and approval by the governing body of the city;

   D.   Any waters or wastes containing strong acid, iron pickling wastes, or concentrated plating solutions cannot be discharged to the sewerage system unless completely neutralized and approved by the governing body of the city for discharge;

   E.   Any waters or wastes containing reducing substances of an organic or inorganic nature, toxic or nontoxic, which exert an immediate chlorine demand if the discharge of such agents will prevent the achievement of an adequate chlorine residual in the effluent of the wastewater treatment facility;

   F.   Any waters or wastes containing phenols or other taste or odor producing substances, in concentrations exceeding limits established by the governing body of the city after treatment of the composite sewage, to meet the requirements of the state, federal or other public agencies of jurisdiction for such discharge to the receiving waters;

   G.   Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the governing body of the city in compliance with applicable state and federal regulations;

   H.   Any waters or wastes having a pH in excess of 9.5;

   I.   Materials which exert or cause:

      1.   Unusual concentrations of inert suspended solids such as, but not limited to, fuller's earth, lime slurries and lime residues, or of dissolved solids such as, but not limited to, sodium chloride and sodium sulfate,

      2.   Excessive discoloration such as, but not limited to, dye wastes and vegetable tanning solutions,

      3.   Unusual chemical oxygen demand, or chlorine requirement in such quantities as to constitute a significant load on the sewage treatment works,

      4.   Slugs or shocks constituting an unusual volume of flow or concentration of wastes which will disturb the normal functioning of either the sewage treatment plant and/or collection system;

   J.   Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment process employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent can not meet the requirements of agencies having jurisdiction over discharge to the receiving waters. (Prior code § 4-3-47 (6))

13.08.150 Wastes deemed hazardous.

   A.   If any waters or wastes are discharged, or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in Section 13.08.140 of this chapter, and which in the judgment of the governing body of the city may have a deleterious effect upon the sewage works, processes, equipment or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the governing body of the city may:

      1.   Reject the wastes;

      2.   Require pretreatment to an acceptable condition for discharge to the public sewers; or

      3.   Require control over the quantities and rates of discharge.

   B.   If the governing body of the city permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the governing body of the city and the state, and subject to the requirements of all applicable codes, ordinances and laws. (Prior code § 4-3-47 (7))

13.08.160 Grease, oil and sand traps required when.

   Grease, oil and sand traps shall be provided when, in the opinion of the governing body of the city, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand or other harmful ingredients; except, that such traps shall not be required for private living quarters or dwelling units. All traps shall be of a type and capacity approved by the governing body of the city, and shall be located as to be readily and easily accessible for cleaning and inspection. Grease and oil traps shall be installed in all new filling stations, garages, restaurants and other new facilities wherein heavy discharge of grease and oil is to be expected. (Prior code § 4-3-47 (9))

13.08.170 Maintenance of pretreatment facilities.

   Where preliminary treatment or flow equalizing facilities are provided for any water or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense. (Prior code § 4-3-47 (10))

13.08.180 Control manholes.

   When required by the governing body of the city, the owner of any property serviced by a building sewer carrying liquid industrial wastes shall install a suitable control manhole together with such necessary meters and other appurtenances in the building sewer to facilitate observation, sampling, and measurement of the wastes. Such manhole, when required, shall be accessible and safely located, constructed in such a manner as to prevent infiltration of ground and surface waters, and should be constructed in accordance with plans approved by the governing body of the city. The manhole shall be installed by the owner at his expense, and shall be maintained by him so as to be safe and accessible at all times. (Prior code § 4-3-47 (11))

13.08.190 Testing of wastes—Costs.

   Testing of an industrial waste will be performed by the governing body of the city. If ever the governing body of the city or the industry requires more frequent tests, then those tests will be paid for by the party requesting the analysis. (Prior code § 4-3-47 (8))