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Discharge Quality Standards


A. Toxic Materials
No person shall discharge or cause to be discharged any of the following described wastes or waters to any public sewers: any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas; any waste stream with a closed cup flash point of less than 140°F as measured by test method 40CFR261.21. Additionally, any waters or wastes containing toxic solids, liquids, or gases in sufficient quantity either single or by interaction with other wastes which may constitute a hazard to humans or animals or create any hazard in the receiving waters or any materials which may cause an upset, interference, inhibition, or pass through of the wastewater treatment plant or sewerage system.


B. Solids or Viscous Materials
No person shall discharge or cause to be discharged any 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, structural materials, straw, shavings, metal, glass, sludge, feathers, grease and fats, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails, and paper dishes, cups, milk containers, chemical residues, paint residues, lime slurry or cannery waste bulk, etc. (either whole or ground by garbage grinders).


C. Other Harmful Wastes
No person shall discharge or cause to be discharged the following described substances, materials, waters, or wastes if it appears, in the opinion of the responsible agency, that such wastes can harm either the sewers, sewer system or equipment, sewage treatment process or equipment, or have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property, or constitute a nuisance. In forming their opinion as to the acceptability of these wastes, the responsible agency will give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in the sewers, materials or construction of the sewers, nature of the sewage treatment process, capacity of the sewage treatment plant, and other pertinent factors. The substances prohibited are:
  1. Any liquid or vapor having a temperature higher than one hundred forty degrees (140°) F., sixty degrees (60°) C.
  2. Any water or waste containing fats, wax, grease, or oils, petroleum base, whether emulsified or not, in excess of eighty (80) mg/1 or one hundred (100) mg/1 containing substances which may solidify or become viscous at temperatures between thirty-two (32°) and one hundred forty (140°) degrees F. or zero degrees (0°) C. and sixty degrees (60°) C.
  3. Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of three-fourth (3/4) horsepower or greater shall be subject to the review and approval of the responsible agency.
  4. Cyanide in excess of two (2) milligrams per liter for amenable cynide and ten (10) milligrams per liter of total cyanide. Both stated figures shall be regulated at the discretion of the responsible agency, using such data as it is provided by the laboratory of the responsible agency.
  5. Any radioactive wastes or isotopes of such a concentration that may exceed the limits established by the applicable State or Federal Regulations, or would cause an upset, interference, inhibition, or pass through at the treatment works.
  6. Any water or wastes, acid or alkaline in reaction, and having corrosive properties capable of causing damage or hazard to structures, equipment or personnel. Any waters or wastes having a pH lower than 5.0 Standard Units (S.U.) Any waters or wastes having a pH higher than 10.5 Standard Units (S.U.). Free acids and alkalis of such waste must be neutralized at all times.
  7. Materials which exert or cause:
    a) Unusual concentrations of inert suspended solids (such as, but not limited to, fuller's earth, lime slurries, and lime residue) or of inert dissolved solids (such as, but not limited to, sodium chloride, calcium chloride and sodium sulfate), from ion exchange softeners.

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

    c) Discharge rate and servicing not to exceed the hydraulic capacity of the sewer, unusual volume of flow, or concentration of wastes constituting "slugs" as defined herein.
  8. Any waters or wastes which contain the substances or possess characteristics which may be injurious to the sewers or which may be hazardous and which in the judgement of the responsible agency may have a deleterious effect upon the sewage works, processes, equipment, or receiving waters, or which otherwise might create a hazard to life or constitute a public nuisance.