.010 No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff, subsurface drainage, contaminated or uncontaminated cooling water or industrial process waters to any public sewer, except as permitted by other ordinances of the City.
.020 Storm water and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as storm drains or to a natural outlet approved by the Engineer. Industrial cooling water or unpolluted process waters may be discharged, on approval of the Engineer, to a storm drain or natural outlet.
.030 No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
.0301 Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas;
.0302 Any waters or wastes containing toxic or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, which may injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance or create any hazard in the receiving waters of the sewage treatment plant, including, but not limited to, cyanides in excess of two mg/l as CN in the wastes as discharged to the public sewer;
.0303 Any waters or wastes having a pH lower than 6.5 or higher than 12.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage works;
.0304 Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the sewage works such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails, and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
.040 No person shall discharge or cause to be discharged to the public sewer the following described substances, materials, waters or wastes if it appears likely, in the opinion of the Engineer, Inspector or Districts, that such wastes may harm either the sewers, sewage treatment process or equipment, have an adverse effect on the receiving stream, or that may otherwise endanger life, limb, public property, or constitute a nuisance. In forming his opinion as to the acceptability of these wastes, the Engineer, Inspector or Districts will give consideration to such factors and 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 prohibited are:
.0401 Any liquid or vapor having a temperature higher than 140° F.;
.0402 Any water or wastes containing fats, wax, grease or oils, whether emulsified or not, in excess of six hundred mg/l of ether soluble matter or visible quantities of floatable oil or containing substances which may solidify or become viscous at temperatures between 32°and 100°F.;
.0403 Any garbage that has not been properly shredded to particles no greater than one-half inch in any dimension;
.0404 Any waters or wastes containing any acid iron pickling wastes, or concentrated plating solutions whether neutralized or not;
.0405 Any waters or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances; or wastes exerting excessive chlorine requirements, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the Engineer or Districts for such materials;
.0406 Any waters or wastes containing phenols or other taste or odor-producing substances, in such concentrations exceeding limits which may be established by the Engineer or Districts as necessary, 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;
.0407 Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Engineer or Districts in compliance with applicable State or Federal regulations;
.0408 Materials which exert or cause:
.0408.01 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 sulfate and sodium chloride, where this constitutes a major portion of the contaminate),
.0408.02 Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions),
.0408.03 Unusual B.O.D., chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works,
.0408.04 Unusual volume of flow or concentration of wastes constituting slugs as defined herein;
.0409 Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
.050 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 this chapter, and which in the judgment of the Engineer or Districts may have a deleterious effect upon the sewage works, processes, equipment or receiving waters, or which otherwise may create a hazard to life or constitute a public nuisance, the Engineer or Districts may:
.0501 Reject the wastes by blocking the building sewer;
.0502 Require pretreatment to an acceptable condition for discharge to the public sewers;
.0503 Require control over the quantities and rates of discharge; and/or
.0504 (Repealed by 5040, 7/25/89)
If the Engineer and Districts permit 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 Engineer and Inspector and subject to the requirements of all applicable codes, ordinances and laws. (Ord. 2585 § 1 (part); October 22, 1968; Ord. 5040 § 5; July 25, 1989; Ord. 6057 §§ 4, 5; May 15, 2007.)