No person shall discharge, or cause to be discharged, to any sanitary sewer, any of the following described substances, water or wastes:
(A) Any liquid or vapor having a temperature higher than 65°C (150°F);
(B) Wastes containing oil or grease of petroleum origin;
(C) Any gasoline, benzene, naphtha, fuel oil, mineral spirits, commercial solvent, motor oil or other flammable or explosive liquid or any other petroleum derivative;
(D) Any water or wastes containing dissolved gases (such as hydrogen sulfide, sulfur dioxide, nitrogen oxides and ammonia) in concentrations sufficient to cause poisonous or toxic fumes or wastewater, or a malodorous or harmful condition;
(E) Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, asphalt materials, cement or concrete, paunch manure, hair and fleshing, entrails, lime slurry, lime residues, beer or distillery spent grains, chemical residues, paint residues, cannery waste, bulk solids or any other solid or viscous substances, in amounts capable of causing obstructions to flow in sewers or interference with the proper operation of the wastewater treatment works;
(F) Any waters or wastes having a pH lower than 5 or higher than 9 at any time, or having any other corrosive property capable of causing damage or being a hazard to structures, equipment and personnel of the wastewater treatment works;
(G) (1) Any waters or wastes containing pollutants in the form of compounds or elements, in solution or suspension, in concentrations exceeding the following:
Pollutant | Maximum Concentration in mg/l |
Pollutant | Maximum Concentration in mg/l |
Arsenic (As) | 0.050 |
Barium (Ba) | 1.000 |
Cadmium (Cd) | 0.100 |
Chromium (Cr) (total) | 3.000 |
Copper (Cu) | 1.000 |
Cyanides (Cn) | 2.000 |
Lead (Pb) | 0.100 |
Manganese (Mn) | 1.000 |
Mercury (Hg) | 0.005 |
Nickel (Ni) | 1.000 |
Selenium (Se) | 0.030 |
Silver (Ag) | 0.100 |
(2) The maximum concentrations shown for the above metals may be used as a guide in design and plant control but may be altered by the Director of Public Works in the event of accumulative overload on the water pollution control plant.
(H) (1) Any waters or wastes containing heavy metals and toxic materials in concentrations prohibited by state or federal rules, including but not limited to:
(a) Antimony;
(b) Beryllium;
(c) Bismuth;
(d) Boron;
(e) Cobalt;
(f) Molybdenum;
(g) Rhenium;
(h) Strontium;
(i) Tellurium;
(j) Fungicides;
(k) Herbicides;
(l) Pesticides; and
(m) Uranyl ion.
(2) Unless the permit required for discharge of industrial wastes specifies conditions of pretreatment, concentrations and volumes.
(I) Any noxious or malodorous gas or substance, capable of creating a public nuisance or hazard to life or preventing entry into sewers for their inspection, maintenance and repair;
(J) Any waters containing quantities of radium, naturally occurring or artificially produced radioisotopes in excess of presently existing or subsequently accepted limits for drinking water as established by the National Committee on Radiation Protection and Measurement;
(K) Any concentrated dye wastes, spent tanning solutions or other wastes which are highly colored, or wastes which are of unusual volume, concentration of solids or composition that may create obstruction to the flow in sewers or interference with the wastewater treatment processes without proper pretreatment and written approval of the Director of Public Works;
(L) Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed, or are amenable to treatment only to the degree that the wastewater treatment plant effluent cannot meet the requirements of the NPDES permit;
(M) Any water or wastes containing more than 2,000 mg/l total solids;
(N) Wastes at a flow rate and/or pollutant discharge rate, which is excessive over short periods of time so that there is a treatment process overload and subsequent loss of treatment efficiency; and
(O) (1) Any waters or wastes having any of the following shall be subject to review by the Director of Public Works:
(a) A five-day biochemical oxygen demand greater than 250 parts per million by weight;
(b) Containing more than 250 parts per million by weight of suspended solids; or
(c) Having an average daily flow greater than 2% of the average sewage flow of the city.
(2) Where necessary in the opinion of the Director of Public Works, the owner shall provide, at such owner’s expense, such preliminary treatment as may be necessary to:
(a) Reduce the biochemical oxygen demand to 250 parts per million by weight;
(b) Reduce the suspended solids to 250 parts per million by weight; or
(c) Control the quantities and rates of discharge of such waters or wastes.
(3) Plans, specifications and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for approval by the City Engineer or Chief Building and Code Inspector and no construction of such facilities shall be commenced until said approvals are obtained in writing.
(Prior Code, § 51.112) (Ord. 2270, passed 6-17-1972; Ord. 2535, passed 12-5-1977; Ord. 03-39, passed 11-17-2003) Penalty, see § 51.999