(A) Prohibited discharges generally. No person may discharge to public sewers any waste which, by itself or by interaction with other wastes, may:
(1) Injure or interfere with wastewater treatment processes or facilities;
(2) Constitute a hazard to humans or animals; or
(3) Create a hazard in the receiving waters of the wastewater treatment plant effluent.
(Prior Code, § 9-2C-4-1)
(B) Chemicals.
(1) No discharge to public sewers may contain:
(a) Cyanide greater than 0.05 milligram per liter;
(b) Fluoride other than that contained in the public water supply;
(c) Chlorides in concentrations greater than 250 mg/l;
(d) Gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas; or
(e) Substances causing an excessive chemical oxygen demand (COD).
(2) No waste or wastewater discharged to public waters may contain:
(a) Strong acid, iron pickling wastes or concentrated plating solutions, whether neutralized or not;
(b) Fats, wax, grease or oils, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32 and 150°F (0 and 65°C);
(c) Objectionable or toxic substances exerting an excessive chlorine requirement to such degree that any such material received in the composite wastewater at the wastewater treatment works exceeds the limits established by the approving authority for such materials; or
(d) Obnoxious, toxic or poisonous solids, liquids or gases in quantities sufficient to violate the provisions of division (A) above.
(3) No waste, wastewater or other substance may be discharged into public sewers which has a pH lower than 5.5 or higher than 9.5, or any other corrosive property capable of causing damage or hazard to structures, equipment and/or personnel at the wastewater facilities.
(4) All waste, wastewater or other substance containing phenols, hydrogen sulfide or other taste and odor producing substances shall conform to concentration limits established by the approving authority. After treatment of the composite wastewater, concentration limits may not exceed the requirements established by state, federal or other agencies with jurisdiction over discharges to receiving waters.
(Prior Code, § 9-2C-4-2)
(C) Heavy metals and toxic materials.
(1) No discharges may contain concentrations of heavy metals greater than amounts specified in this division (C). The maximum allowable concentrations of heavy metals stated in terms of milligrams per liter (mg/l), determined on the basis of individual sampling in accordance with Standard Methods are:
Arsenic | 0.05 |
Barium | 5.00 |
Boron | 1.00 |
Cadmium | 0.05 |
Chromium (total) | 0.10 |
Copper | 0.10 |
Lead | 0.10 |
Manganese | 1.00 |
Mercury | 0.005 |
Nickel | 1.00 |
Selenium | 0.05 |
Silver | 0.10 |
Zinc | 0.30 |
(2) No other heavy metals or toxic materials may be discharged into the public sewers without a permit from the approving authority specifying conditions of pretreatment, concentrations, volumes and other applicable provisions.
(3) Prohibited heavy metals and toxic materials include, but are not limited to:
(a) Antimony;
(b) Beryllium;
(c) Bismuth;
(d) Cobalt;
(e) Fungicides;
(f) Herbicides;
(g) Molybdenum;
(h) Pesticides;
(i) Rhenium;
(j) Strontium;
(k) Tellurium; and
(l) Uranyl ion.
(Prior Code, § 9-2C-4-3)
(D) Materials impairing the system.
(1) No person may discharge into public sewers any substance capable of causing:
(a) Obstruction to the flow in sewers;
(b) Interference with the operation of treatment processes of facilities; or
(c) Excessive loading of treatment facilities.
(2) Discharges prohibited by division (D)(1) above include, but are not limited to, materials which exert or cause concentrations of:
(a) Inert suspended solids greater than 250 mg/l including, but not limited to:
1. Fuller’s earth;
2. Lime slurries; and
3. Lime residues.
(b) Dissolved solids greater than 500 mg/l including, but not limited to:
1. Sodium chlorides; and
2. Sodium sulfates.
(c) Excessive discoloration including, but not limited to:
1. Dye wastes; and
2. Vegetable tanning solutions.
(d) BOD, COD or chlorine demand in excess of normal plant capacity.
(3) No person may discharge into the public sewers any substance that may:
(a) Deposit grease or oil in the sewer lines in such a manner as to clog the sewers;
(b) Overload skimming and grease handling equipment;
(c) Pass to the receiving waters without being effectively treated by normal wastewater treatment processes due to the non-amenability of the substance to bacterial action; or
(d) Deleteriously affect the treatment process due to excessive quantities.
(4) No person may discharge any substance into the public sewers which:
(a) Is not amenable to treatment or reduction by the processes and facilities employed; or
(b) Is amenable to treatment only to such a degree that the treatment plan effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(5) The approving authority shall regulate the flow and concentration of slugs when they may:
(a) Impair the treatment process;
(b) Cause damage to collection facilities;
(c) Incur treatment costs exceeding those for normal wastewater; or
(d) Render the waste unfit for stream disposal or industrial use.
(6) No person may discharge into public sewers solids or viscous substances which may violate division (D)(1) above if present in sufficient quantity or size including, but not limited to:
(a) Ashes;
(b) Bulk solids;
(c) Chemical residues;
(d) Cinders;
(e) Entrails;
(f) Feathers;
(g) Glass;
(h) Hair and fleshings;
(i) Metal;
(j) Mud;
(k) Paint residues;
(l) Paper products, either whole or ground by garbage grinders;
(m) Paunch manure;
(n) Plastics;
(o) Rags;
(p) Sand;
(q) Shavings;
(r) Slops;
(s) Straw;
(t) Tar;
(u) Unground garbage;
(v) Whole blood; and
(w) Wood.
(Prior Code, § 9-2C-4-4)
Penalty, see § 52.99