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TITLE 5 PUBLIC UTILITIES AND PROPERTY

CHAPTER 2 SEWER USE

SECTION 5-2-2 PROHIBITIONS AND LIMITATIONS ON WASTEWATER DISCHARGE

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  (A)          Prohibitions on Wastewater Discharges: No person shall discharge or deposit or cause or allow to be discharged or deposited into the wastewater treatment system any wastewater which contains the following:
  (1)   Oils and Grease. Solid or viscous oils or grease which may cause obstructions to the flow in a sewer or other interference with the operation of the wastewater treatment facility. Oils and greases containing substances which may solidify or become viscous at temperatures between 32 degrees and 150 degrees F (32° and 150° F) at the point of discharge into the system.
  (2)   Explosive Mixtures. 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 sewerage facilities or to the operation of the system. At no time shall two (2) successive readings on an explosion hazard meter, at the point of discharge into the sewer system, be more than five percent (5%) nor any single reading over ten percent (10%) of the Lower Explosive Limit (L.E.L.) of the meter. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, zylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchalorates, bromates, carbides, hydrides and sulfides.
  (3)   Noxious Material. Noxious or malodorous solids, liquids or gases, which , either singly or by interaction with other wastes, are capable of creating a public nuisance or hazard to life, or are or may be sufficient to prevent entry into a sewer for its maintenance and repair.
  (4)   Improperly Shredded Garbage. Garbage that has not been ground or comminuted to such a degree that all particles will be carried freely in suspension under flow conditions normally prevailing in the public sewers, with no particle greater than one-half inch (1/2") in any dimension.
  (5)   Radioactive Wastes. Radioactive wastes or isotopes of such half-life or concentration that they do not comply with regulations or orders issued by the appropriate authority having control over their use and which will or may cause damage or hazards to the sewerage facilities or personnel operating the system.
   
  (6)   Solid or Viscous Wastes. Solid or viscous wastes which will or may cause obstruction to the flow in a sewer, or otherwise interfere with the proper operation of the wastewater treatment system. Prohibited materials include, but are not limited to, grease, uncomminuted garbage, 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, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, and similar substances.
  (7)   Excessive Discharge Rate. Wastewaters at a flow rate or containing such concentrations or quantities of pollutants that exceeds for any time period longer than fifteen (15) minutes more than five (5) times the average twenty-four (24) hour concentration, quantities or flow during normal operation and that would cause a treatment process upset and subsequent loss of treatment efficiency.
  (8)   Toxic Substances. Any toxic substances in amounts exceeding standards promulgated by the Administrator of the United States Environmental Protection Agency pursuant to section 307(a) of the Act, and chemical elements or compounds, phenols or other taste or odor producing substances, or any other substances which are not susceptible to treatment or which may interfere with the biological processes or efficiency of the treatment system, or that will pass through the system.
  (9)   Unpolluted Waters. Any unpolluted water including, but not limited to, water from cooling systems or of storm water origin, which will increase the hydraulic load on the treatment system.
  (10) Discolored Material. Wastes with objectionable color not removable by the treatment process.
  (11) Corrosive Wastes. Any waste which will cause corrosion or deterioration of the treatment system. All wastes discharged to the public sewer system must have a pH value in the range of six (6) to nine (9) standard units. Prohibited materials, include, but are not limited to, acids, sulfides, concentrated chloride and fluoride compounds and substances which will react with water to form acidic products.
  (12) Prohibited and Categorical Wastes. Any wastes defined by the EPA pretreatment regulations as a "prohibited " or "categorical" waste as defined by 40 CFR, Section 403.5(b) and Section 403.6.
   
  (B)           Limitations on Wastewater Discharges. No person shall discharge or convey, or permit or allow to be discharged or conveyed, to a public sewer any wastewater containing pollutants of such character or quantity that will:
  (1)   Not be susceptible to treatment or interfere with the process or efficiency of the treatment system.
  (2)   Constitute a hazard to human or animal life, or to the stream or water course receiving the treatment plant effluent.
  (3)   Violate pretreatment standards.
  (4)   Cause the treatment plant to violate its NPDES permit or applicable receiving water standards.
  (5)   Cause the treatment works to be over loaded by either large flows or large concentrations of pollutants.