No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, uncontaminated cooling water, or unpolluted industrial process waters to any sanitary sewer.
Stormwater and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as approved by the Water Pollution Control Authority. Industrial cooling water or unpolluted process waters may be discharged, on approval of the Water Pollution Control Authority, to a storm sewer, combined sewer or natural outlet.
No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
A. 
Any gasoline, benezene, naphtha, fuel oil, or flammable or explosive liquid, solid, or gas.
B. 
Any waters or wastes containing toxic or poisonous solids, liquids, or gases in sufficient quantity, either singly or by interaction with other wastes, to 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.[1]
[1]
Editor's Note: Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. I).
C. 
Any waters or wastes having a pH lower than 5.5, or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personnel of the sewerage works.
D. 
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 sewerage 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. Ground garbage will be accepted subject to the following conditions:
(1) 
That only food wastes be considered as garbage;
(2) 
That all ground particles be of such size that they will be carried freely under the normal flow conditions prevailing in the sewer conduit to which they are contributory;
(3) 
Installation of a garbage grinder with three-fourths horsepower (or greater) motor should be subject to approval of the regulatory agency; and
(4) 
That limitations on acceptable garbage grinder operation specify that not more than 30%, on the dry basis, pass a No. 40 U.S. standard sieve.
No person shall discharge or cause to be discharged the following described substances, materials, waters, or wastes if it appears likely, in the opinion of the Water Pollution Control Authority, that such wastes can harm either the sewers, sewage treatment process, or equipment, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property, or constitute a nuisance. In forming its opinion as to the acceptability of these wastes, the Water Pollution Control Authority will give consideration to such factors as 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, and other pertinent factors. The substances prohibited are:
A. 
Any liquid or vapor having a temperature higher than 150° F. (65° C.).
B. 
Any water or waste containing 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° F. and 150° F. (0° C. and 65° C.).
C. 
Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of 3/4 horsepower (0.76 hp metric) or greater shall be subject to the review and approval of the Water Pollution Control Authority.
D. 
Any waters or wastes containing strong acid iron pickling wastes, or concentrated plating solutions whether neutralized or not.
E. 
Any waters or wastes containing iron, chromium, copper, zinc, and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the Water Pollution Control Authority 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; of any ashes, shavings or sawdust, metal, sticks, coarse rubbish, glass, rags, tar, feathers, plastics, waste rubber, animal guts, or tissues, entrails, blood, hair hides, wood, paunch manure, or any other substance likely to damage, destroy or cause an obstruction to the flow in any sewer or which may interfere with the proper operation of the sewerage works.
F. 
Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Water Pollution Control Authority in compliance with applicable state or federal regulations.
G. 
Any waters or wastes having a pH lower than 5.0 or higher than 9.5 or having any other corrosive or detrimental property capable of causing damage or hazard to the sewerage works or personnel.
H. 
Materials which exert or cause:
(1) 
Unusual concentrations of inert suspended solids (such as, but not limited to, Fullers earth, lime slurries, and lime residues) or dissolved solids (such as, but not limited to, sodium chloride and sodium sulfate).
(2) 
Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions).
(3) 
Unusual BOD, chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works.
(4) 
Unusual volume of flow or concentration of wastes constituting "slugs" as defined herein.
I. 
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.
[1]
Editor's Note: Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. I).
A. 
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 § 312-36 of this article, and which, in the judgment of the Water Pollution Control Authority, may have a deleterious effect upon the sewerage works, processes, equipment, or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the Water Pollution Control Authority may:
(1) 
Reject the wastes.
(2) 
Require pretreatment to an acceptable condition for discharge to the public sewers.
(3) 
Require payment to cover the added cost of handling and treating the wastes.
(4) 
Require control over the quantities and rates of discharge.
B. 
If the Water Pollution Control Authority permits 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 Water Pollution Control Authority, and subject to the requirements of all applicable codes, ordinances, and laws.
Grease, oil, and sand interceptors shall be provided when, in the opinion of the Water Pollution Control Authority, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand, or other harmful ingredients; except that such interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the Water Pollution Control Authority, and shall be located so as to be readily and easily accessible for cleaning and inspection.
Where preliminary treatment or flow-equalizing facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
When required by the Water Pollution Control Authority, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable control manhole, together with such necessary meters and other appurtenances, in the building sewer to facilitate observation, sampling, and measurement of the wastes. Such manhole, when required, shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the Water Pollution Control Authority. The manhole shall be installed by the owner at his expense, and shall be maintained by him so as to be safe and accessible at all times. All industries discharging into a public sewer shall perform such monitoring of their discharge as the Director and/or other duly authorized employees of the City may reasonably require, including installation, use and maintenance of monitoring equipment, keeping records and reporting the results of such monitoring to the Director. Such records shall be made available upon request by the Director to other agencies having jurisdiction over discharges to the receiving waters.
[1]
Editor's Note: Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. I).
All measurements, tests, and analysis of the characteristics of waters and wastes to which reference is made in this chapter shall be determined in accordance with the latest edition of Standard Methods for the Examination of Water and Wastewater, published by the American Public Health Association, and shall be determined at the control manhole provided, or upon suitable samples taken at said control manhole. In the event that no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected. Sampling shall be carried out by customarily accepted methods to reflect the effect of constituents upon the sewerage works and to determine the existence of hazards to life, limb, and property. (The particular analysis involved will determine whether a twenty-four-hour composite of all outfalls of a premises is appropriate or whether a grab sample or samples should be taken. Normally, but not always, BOD and suspended solids analyses are obtained from twenty-four-hour composites of all outfalls whereas pHs are determined from periodic grab samples.)
No statement contained in this article shall be construed as preventing any special agreement or arrangement between the Water Pollution Control Authority and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the Water Pollution Control Authority for treatment, subject to payment therefor by the industrial concern, provided that such agreements do not contravene any requirements of existing state and federal laws and are compatible with any user charge and industrial cost recovery SYSTEM IN effect. Notification of any such special agreements must be given to the Common Council by the Water Pollution Control Authority.